Equity Components [Axis]
Common Shares [Member]
Treasury Shares [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Loss [Member]
Type of Arrangement and Non-arrangement Transactions [Axis]
Securities Purchase Agreement [Member]
Counterparty Name [Axis]
Placement Agents [Member]
Nature of Expense [Axis]
Placement Agent Fees [Member]
Pocket and Legal Expenses [Member]
Second Amended Purchase Agreement [Member]
Sale of Stock [Axis]
Over-Allotment Option [Member]
One Agreement [Member]
Legal Entity of Counterparty, Type [Axis]
Barclays Bank [Member]
Cash and Cash Equivalents [Axis]
Checking and Savings Accounts [Member]
Money Market Account [Member]
Restricted Cash and Cash Equivalents [Axis]
Barclay's Bank Agreement [Member]
Concentration Risk Benchmark [Axis]
Sales Revenue, Net [Member]
Concentration Risk Type [Axis]
Customer Concentration Risk [Member]
Customer [Axis]
Mitsui Engineering & Shipbuilding [Member]
Office of Naval Research [Member]
Income Statement Location [Axis]
Product Development [Member]
Selling, General and Administrative [Member]
Award Type [Axis]
Employee Stock Option [Member]
Restricted Stock [Member]
Non-vested Restricted Stock [Member]
Measurement Frequency [Axis]
Fair Value, Measurements, Recurring [Member]
Fair Value, Hierarchy [Axis]
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 3 [Member]
Financial Instrument [Axis]
Warrant Liability [Member]
Geographical [Axis]
Monore Township [Member]
Plan Name [Axis]
2018 Inducement Plan [Member]
Litigation Case [Axis]
Stipulation [Member]
Income Tax Authority, Name [Axis]
New Jersey Division of Taxation [Member]
Restricted Cash [Member]
Santander Bank [Member]
Property, Plant and Equipment, Type [Axis]
Equipment [Member]
Computer Equipment & Software [Member]
Office Furniture & Equipment [Member]
Leasehold Improvements [Member]
Equipment Under Capitalized Lease [Member]
North America [Member]
Asia and Australia [Member]
Europe [Member]
Legal Entity [Axis]
Tide Runner Marine, Inc. [Member]
Eni S.p.A [Member]
Premier Oil UK Limited [Member]
Range [Axis]
Minimum [Member]
2015 Omnibus Incentive Plan [Member]
Non-Vested Restricted Stock [Member]
Tax Authority, Spain [Member]
Adjustments for New Accounting Pronouncements [Axis]
Effect of Adoption [Member]
Amounts Excluding Effect of Adoption [Member]
Stock Purchase Agreement [Member]
Aspire Capital Fund, LLC [Member]
Warrant [Member]
Related Party [Axis]
Charles F. Dunleavy [Member]
2019 ATM Facility [Member]
Alliance Global Partners [Member]
Settlement [Member]
Wittich [Member]
Pre-funded Warrants [Member]
Measurement Input Type [Axis]
Dividend Rate [Member]
Risk Free Interest Rate [Member]
Maximum [Member]
Expected Volatility [Member]
Euro [Member]
Office Furniture & Fixtures [Member]
Other [Member]
Construction in Process [Member]
Income Tax Authority [Axis]
State and Local Jurisdiction [Member]
Foreign Tax Authority [Member]
Expected Life (Years) [Member]
Class of Stock [Axis]
Undesignated Preferred Stock [Member]
Document And Entity Information
Entity Registrant Name
Entity Central Index Key
Document Type
Document Period End Date
Amendment Flag
Current Fiscal Year End Date
Entity a Well-known Seasoned Issuer
Entity a Voluntary Filer
Entity's Reporting Status Current
Entity Interactive Data Current
Entity Filer Category
Entity Small Business Flag
Entity Emerging Growth Company
Entity Ex Transition Period
Entity Shell Company
Entity Public Float
Entity Common Stock, Shares Outstanding
Document Fiscal Period Focus
Document Fiscal Year Focus
Statement of Financial Position [Abstract]
ASSETS
Current assets:
Cash and cash equivalents
Marketable securities
Restricted cash- short-term
Accounts receivable
Unbilled receivables
Contract assets
Litigation receivable
Other current assets
Total current assets
Property and equipment, net
Restricted cash- long-term
Total assets
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable
Accrued expenses
Litigation payable
Unearned revenue
Contract liabilities
Warrant liabilities
Current portion of capital lease obligations
Deferred credits payable current
Total current liabilities
Deferred rent
Total liabilities
Commitments and contingencies
Ocean Power Technologies, Inc. stockholders' equity:
Preferred stock, $0.001 par value; authorized 5,000,000 shares, none issued or outstanding
Common stock, $0.001 par value; authorized 100,000,000 shares, issued 5,425,517 and 921,247 shares, respectively
Treasury stock, at cost; 3,770 and 3,701 shares, respectively
Additional paid-in capital
Accumulated deficit
Accumulated other comprehensive loss
Total stockholders' equity
Total liabilities and stockholders' equity
Preferred stock, par value
Preferred stock, shares authorized
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value
Common stock, shares authorized
Common stock, shares issued
Treasury stock, shares
Income Statement [Abstract]
Revenues
Cost of revenues
Gross profit/(loss)
Operating expenses:
Engineering and product development costs
Selling, general and administrative costs
Total operating expenses
Operating loss
Gain due to the change in fair value of warrant liabilities
Interest income, net
Other income
Foreign exchange gain/(loss)
Loss before income taxes
Income tax benefit
Net loss
Basic and diluted net loss per share
Weighted average shares used to compute basic and diluted net loss per share
Statement of Comprehensive Income [Abstract]
Net loss
Foreign currency translation adjustment
Total comprehensive loss
Statement [Table]
Statement [Line Items]
Balance
Balance, shares
Stock based compensation
Issuance/(forfeiture) of restricted stock, net
Issuance/(forfeiture) of restricted stock, net, shares
Sale of stock
Sale of stock, shares
Acquisition of treasury stock
Acquisition of treasury stock, shares
Adoption of accounting standard update related to stock compensation accounting (ASU 2016-09)
Other comprehensive loss
Common stock issued for commitment fee
Common stock issued for commitment fee, shares
Issuance of common stock- Aspire financing, net of issuance costs
Issuance of common stock- Aspire financing, net of issuance costs, shares
Issuance of common stock- AGP At The Market offering, net of issuance costs
Issuance of common stock- AGP At The Market offering, net of issuance costs, shares
Issuance of common stock, common and pre-funded warrants, net of issuance costs
Issuance of common stock, common and pre-funded warrants, net of issuance costs, shares
Exercise of pre-funded warrants
Exercise of pre-funded warrants, shares
Other
Other, shares
Balance
Balance, shares
Statement of Cash Flows [Abstract]
Cash flows from operating activities:
Adjustments to reconcile net loss to net cash used in operating activities:
Foreign exchange loss/(gain)
Depreciation
Loss on disposal of property, plant and equipment
Compensation expense related to stock option grants and restricted stock
Gain due to the change in fair value of warrant liabilities
Changes in operating assets and liabilities:
Accounts receivable
Unbilled receivables
Contract assets
Other assets
Accounts payable
Accrued expenses
Deferred rent
Deferred credit payable
Unearned revenue
Contract liabilities
Net cash used in operating activities
Cash flows from investing activities:
Purchases of marketable securities
Maturities of marketable securities
Leasehold improvements and purchase of equipment
Net cash used in investing activities
Cash flows from financing activities:
Proceeds from issuance of common stock, net of issuance costs
Proceeds from issuance of common stock- Aspire financing net of issuance costs
Proceeds from issuance of common stock- AGP At The Market offering, net of issuance costs
Proceeds from issuance of common stock, common and pre-funded warrants, net of issuance costs
Proceeds from exercise of pre-funded warrants
Payment of capital lease obligations
Acquisition of treasury stock
Net cash provided by financing activities
Effect of exchange rate changes on cash, cash equivalents and restricted cash
Net increase in cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash, beginning of period
Cash, cash equivalents and restricted cash, end of period
Supplemental schedule of cash flows information:
Cash paid for interest
Supplemental disclosure of noncash investing activities:
Acquisition of leasehold improvements and equipment through accrued expenses
Supplemental disclosure of noncash financing activities:
Common stock issued for payment of commitment fee
Accounting Policies [Abstract]
Background and Liquidity
Summary of Significant Accounting Policies
Account Receivable Contract Assets And Contract Liabilities
Account Receivable, Contract Assets, and Contract Liabilities
Property, Plant and Equipment [Abstract]
Property and Equipment
Payables and Accruals [Abstract]
Accrued Expenses
Compensation Related Costs [Abstract]
Deferred Credits Payable
Warrants and Rights Note Disclosure [Abstract]
Warrants
Equity [Abstract]
Preferred Stock
Common Stock
Treasury Shares
Share-based Payment Arrangement [Abstract]
Share-Based Compensation Plans
Fair Value Disclosures [Abstract]
Fair Value Measurements
Income Tax Disclosure [Abstract]
Income Taxes
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies
Segment Reporting [Abstract]
Operating Segments and Geographic Information
Accounting Changes and Error Corrections [Abstract]
Adoption of Revenue Recognition Guidance
Consolidation
Use of Estimates
Revenue Recognition
Cash and Cash Equivalents, Restricted Cash and Security Agreements
Marketable Securities
Property and Equipment
Foreign Exchange Gains and Losses
Concentration of Credit Risk
Warrant Accounting
Net Loss Per Common Share
Share-Based Compensation
Deferred Rent
Income Taxes
Accumulated Other Comprehensive Loss
Recently Issued Accounting Standards
Schedule of Cash and Cash Equivalents
Schedule of Cash and Cash Equivalents and Restricted Cash
Schedule of Property, Plant and Equipment, Useful Life
Schedule of Revenue by Major Customers by Reporting Segments
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
Schedule of Accounts Receivable
Schedule of Contract Assets and Contract Liabilities
Schedule of Components of Property and Equipment
Schedule of Accrued Expenses
Schedule of Fair Value Assumptions Used
Schedule of Stock Option Activity
Schedule of Non-vested Restricted Stock Activity
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
Summary of Changes on Value of Warrant Liability Using Significant Unobservable Inputs
Schedule of Components of Loss Before Income Taxes
Schedule of Effective Income Tax Rate Reconciliation
Schedule of Deferred Tax Assets and Liabilities
Schedule of Future Minimum Payments for Operating Leases
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas
Schedule of Condensed Consolidated Financial Statements
Collaborative Arrangement and Arrangement Other than Collaborative [Axis]
Statistical Measurement [Axis]
Accumulated deficit
Cash, cash equivalents and restricted cash, at carrying value
Number of financing agreements closed
Number of common stock shares sold
Warrant to purchase shares common stock
Class of warrant or right, number of securities called by each warrant or right
Combined purchase price per share
Proceeds from issuance or sale of equity, net of issuance costs
Class of warrant or right, exercise price of warrants or rights
Class of warrant or right, expiration period
Payments of stock issuance costs
Aggregate purchase of common stock
Percentage of outstanding common stock
Common stock issued for commitment fee
Aggregate offering price
Payment of sales commission
Revenue remaining performance obligation
Revenue remaining performance obligation, percentage
Performance obligation revenue of next twelve months
Additional performance obligation revenue of next twelve months
Long-term line of credit
Line of credit facility, commitment fee percentage
Letters of credit outstanding, amount
Concentration risk percentage
Antidilutive securities excluded from computation of earnings per share, shares
Share-based compensation expense
Fair value of weighted average price per shares
Share based compensation restricted stock granted
Term of lease
Area of land
Tenant improvement work
Right-of-use asset
Right-of-use lease liability
Restricted Cash
Cash and Cash Equivalents
Restricted cash- short term
Restricted cash- long term
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Scenario [Axis]
Property and equipment, useful life (Year)
Property and equipment, useful life
Revenues, percentage
Total share-based compensation expense
Risk-free interest rate
Expected dividend yield
Expected life (in years)
Expected volatility
Revenue recognized
Revenue related to performance obligations
Account Receivable Contract Assets And Contract Liabilities - Schedule Of Accounts Receivable
Opening balance
Amount invoiced to customer
Collections
Ending balance
Account Receivable Contract Assets And Contract Liabilities - Schedule Of Contract Assets And Contract Liabilities
Contract liabilities
Contract (liability)/assets, net
Depreciation
Capital leased assets, gross
Capital lease, term
Property and equipment, gross
Less: accumulated depreciation
Property and equipment, net
Project costs
Contract loss reserve
Employee incentive payments
Accrued salary and benefits
Legal and accounting fees
Accrued taxes payable
Other
Accrued expenses total
Customer advances or deposits, noncurrent
Deferred credits payable option details
Deferred credits payable market discount rate
Deferred credits payable market liquidated damages rate
Option fee amount
Number of common stock shares sold
Combined purchase price per share
Warrant exercise price per share
Class of warrant or right, expiration period
Unexercised warrants
Unrealized gain on warrants
Fair value measurement percent
Fair value measurement expected life
Sale of stock, price per share
Value of common stock shares sold, net of issuance costs
Percentage of outstanding common stock limit for shareholder approval
Treasury stock, shares, acquired
Share-based compensation arrangement by share-based payment award, number of shares authorized
Stock based compensation shares, available for grant
Maximum number of shares that can be granted to participant in calendar year
Number of shares outstanding during period
Share-based compensation intrinsic value of outstanding
Share-based compensation options, exercisable intrinsic value
Share-based compensation unvested shares of stock options
Share-based compensation weighted average remaining contractual term
Unrecognized compensation cost related to non-vested stock options
Share-based compensation cost expected to recognize weighted-average term
Number of restricted shares granted
Unrecognized compensation cost related to unvested restricted stock
Shares Underlying Options Outstanding, Beginning
Shares Underlying Options Outstanding, Granted
Shares Underlying Options Outstanding, Exercised
Shares Underlying Options Outstanding, Cancelled/forfeited
Shares Underlying Options Outstanding, Ending
Shares Underlying Options Outstanding, Exercisable at Ending
Weighted Average Exercise Price, Beginning Balance
Weighted Average Exercise Price, Granted
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Cancelled/forfeited
Weighted Average Exercise Price, Ending Balance
Weighted Average Exercise Price, Exercisable at Ending
Weighted Average Remaining Contractual Term (In Years), Beginning
Weighted Average Remaining Contractual Term (In Years), Ending
Weighted Average Remaining Contractual Term (In Years), Exercisable at Ending
Number of Shares, Issued and unvested, Beginning
Number of Shares, Granted
Number of Shares, Vested
Number of Shares, Cancelled/forfeited
Number of Shares, Issued and Unvested, Ending
Weighted Average Price per Share, Issued and Unvested, Beginning
Weighted Average Price per Share, Granted
Weighted Average Price per Share, Vested
Weighted Average Price per Share, Cancelled/forfeited
Weighted Average Price per Share, Issued and Unvested, Ending
Fair Value Hierarchy and NAV [Axis]
Fair value, beginning
Issuance
Transfers
Change in fair value
Fair value, ending
Balance Sheet Location [Axis]
Income tax (expense) benefit
Deferred tax assets, valuation allowance
Valuation allowance, deferred tax asset, increase (decrease), amount
Operating loss carryforwards
Deferred tax assets, tax credit carryforwards, research and development
Income tax description
Operating loss carryforwards, limitation
Foreign net operating loss carry forwards
Proceed from sale of loss carryforwards and tax credits
Domestic
Foreign
Total loss before income taxes
Computed expected tax (benefit)
State income taxes, net of federal (benefit)
Federal research and development tax credits
Foreign rate differential
Other non-deductible expenses
Proceeds of sale of New Jersey tax (benefits)
U.S. tax reform effects
Other
Increase in valuation allowance
Income tax (benefit)
Federal net operating loss carryforwards
Foreign net operating loss carryforwards
State operating loss carryforwards
Federal and New Jersey research and development tax credits
Stock compensation
Unrealized foreign exchange loss
Accrued expenses
Other
Net deferred tax assets before valuation allowance
Valuation allowance
Net deferred tax assets
Lease expiration
Lease term
Security deposit
Operating leases, tenant improvement allowance, maximum
Operating leases, rent expense
Litigation settlement, amount awarded to other party
Loss Contingency Accrual
Loss contingency, receivable
Damages sought value
Stock price per share
Debt description
Income tax examination, penalties and interest accrued
2020
2021
2022
2023
2024
Thereafter
Total
Number of reportable segments
Revenues from external customers
Operating loss
Long-lived assets
Total assets
Increase in revenue remaining performance obligation
Total comprehensive loss
Contract liability
Stockholders' equity
Total liabilities and stockholders' equity
Contract liability
Net cash used in operating activities
Net increase in cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash, end of period
Account Receivable, Contract Assets, and Contract Liabilities [Text Block]
Alliance Global Partners [Member]
Amounts Excluding Effect of Adoption [Member]
Asia and australia [member]
Aspire Capital Fund, LLC [Member]
August 30, 2018 [Member]
Barclays bank agreement [member]
Barclays Bank [Member]
Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including, but not limited to, disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.
Charles F. Dunleavy [Member]
Checking and Savings Accounts [Member]
Common stock issued for commitment fee.
Common stock issued for commitment fee, shares.
Computer Equipment & Software [Member]
Cost Plus [Member]
Cost Sharing [Member]
Customer Advances And Deposits Disclosure [Text Block]
Deferred Credits Payable Market Discount Rate
Deferred Credits Payable Market Liquidated Damages Rate
Deferred credits payable option details
Effect of Adoption [Member]
Enel Green Power [Member]
Eni S.p.A [Member]
Equipment Under Capitalized Lease [Member]
Firm Fixed Price [Member]
Fixed Price [Member]
George W. Taylor [Member]
Income Tax Reforms [Member]
Increase in revenue remaining performance obligation.
Market Offering Agreement [Member]
May 01, 2019 [Member]
Related to the customer Mitsui Engineering and Ship Building.
Money Market Account [Member]
Monore Township [Member]
Monroe Lease [Member]
Naval Research [Member]
New Jersey Board of Public Utilities 1 [Member]
Non-vested Restricted Stock [Member]
OPTA [Member]
Offering Agreement [Member]
Represents office furniture and equipment.
Office Furniture & Fixtures [Member]
Office of Naval Research [Member]
One Agreement [Member]
Option fee amount.
Overnight Repurchase Account [Member]
Performance-based Vesting [Member]
Placement Agent Fees [Member]
Placement Agents [Member]
Pocket and Legal Expenses [Member]
Premier Oil UK Limited [Member]
Primary financial statement caption encompassing product development.
Restricted Cash [Member]
Reverse Stock Split [Member]
Cash on deposit at Santander Bank which serves as security for letter of credit.
Second Amended Purchase Agreement [Member]
Securities Purchase Agreement [Member]
September 11th, 2018 [Member]
Service-based Vesting [Member]
Settlement [Member]
Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
Stern Lawsuit [Member]
Stipulation [Member]
Stock Incentive Plan 2015 [Member]
Stock Incentive Plan 2006 [Member]
Stock Purchase Agreement [Member]
Tide Runner Marine, Inc. [Member]
2018 Inducement Plan [Member]
2015 Omnibus Incentive Plan [Member]
2019 ATM Facility [Member]
Related to the customer U.S. Department of Defense Office of Naval Research.
Warrants [Text Block]
Warrant Liability[Member]
Wittich [Member]
Adoption of accounting standard update related to stock compensation accounting.
Issuance of common stock for financing, net of issuance costs.
Issuance of common stock at the market offering, net of issuance costs.
Issuance of common stock, common and pre-funded warrants, net of issuance costs.
Issuance of common stock, common and pre-funded warrants, net of issuance costs, shares.
Issuance of common stock for financing, net of issuance costs, shares.
Issuance of common stock at the market offering, net of issuance costs, shares.
Exercise of pre-funded warrants.
Exercise of pre-funded warrants, shares.
Proceeds from issuance of common stock, common and pre-funded warrants, net of issuance costs.
Warrant Accounting [Policy Text Block]
Accumulated Other Comprehensive Loss [Policy Text Block]
Tabular disclosure of the useful lives of physical assets used in the normal conduct of business and not intended for resale.
The increase (decrease) during the reporting period of the amount of revenue for work performed for which billing has not occurred, net of uncollectible accounts.
Pre-funded Warrants [Member]
Unexercised warrants.
Undesignated Preferred Shares [Member]
Percentage of outstanding common stock.
At the Market Offering Agreement [Member]
A.G.P Alliance Global Partners [Member]
Maximum number of shares that can be granted to participant in calendar year.
Euro [Member]
Other [Member]
Contract (liability)/assets, net.
Represent the term of the capital lease.
Construction in Process [Member]
The ceiling amount of all operating loss carryforwards available to reduce future taxable income.
Foreign net operating loss carry forwards.
Amount received from sale of net operating loss carryforwards and other tax credits.
The proceeds of a sale of new jersey tax benefits expressed as a percentage in the effective tax rate reconciliation.
Effective income tax rate reconciliation tax reform effects.
Amount of deferred tax assets net of deferred tax liabilities before allocation of valuation allowance.
Lease expiration.
Lease term.
The maximum amount of tenant improvement allowance under the operating leases.
Payment of sales commission.
Aggregate purchase of common stock.
Common stock issued for commitment fee.
Refers to the number of financing agreements closed by the company.
Period from date of issuance that the warrant or right expires.
Right-of-use lease liability.
Undesignated Preferred Stock [Member]
Acquisition of leasehold improvements and equipment through accrued expenses.
Common stock combined purchase price per share.
Percentage of remaining performance obligation to total remaining performance obligation not recognized as revenue.
Additional performance obligation revenue of next twelve months.
The cash inflow associated with the amount received from entity's first offering of stock to the public.
Assets, Current
Liabilities, Current
Liabilities
Treasury Stock, Value
Gross Profit
Operating Expenses
Income Tax Expense (Benefit)
Shares, Outstanding
Treasury Stock, Value, Acquired, Cost Method
Gain (Loss) on Disposition of Property Plant Equipment
Increase (Decrease) in Accounts Receivable
IncreaseDecreaseInUnbilledReceivable
Increase (Decrease) in Contract with Customer, Asset
Increase (Decrease) in Other Operating Assets
Increase (Decrease) in Accounts Payable
Increase (Decrease) in Accrued Liabilities
Increase (Decrease) in Deferred Liabilities
Increase (Decrease) in Deferred Revenue
Payments to Acquire Marketable Securities
Payments to Acquire Machinery and Equipment
Net Cash Provided by (Used in) Investing Activities
Repayments of Long-term Capital Lease Obligations
Payments for Repurchase of Common Stock
Net Cash Provided by (Used in) Financing Activities
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations
Property, Plant and Equipment, Policy [Policy Text Block]
Income Tax, Policy [Policy Text Block]
StockIssuedDuringPeriodSharesIssuedForCommitmentFees
Proceeds from Sale and Collection of Receivables
ContractWithCustomerAssetsAndLiabilitiesCurrent
Depreciation [Default Label]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Other Accrued Liabilities, Current
CommonStockCombinedPurchasePricePerShare
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent
Effective Income Tax Rate Reconciliation, Percent
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities
Deferred Tax Assets, Other
optt_DeferredTaxAssetsNetBeforeValuationAllowance
Deferred Tax Assets, Net
Operating Leases, Future Minimum Payments Due