XML 14 R2.htm IDEA: XBRL DOCUMENT
v3.25.3

Pay vs Performance Disclosure - USD ($) | 12 Months Ended
--- | ---
Apr. 30, 2025 | Apr. 30, 2024 | Apr. 30, 2023
Pay vs Performance Disclosure [Table] |  |  |  |
Pay vs Performance [Table Text Block] |  |
Fiscal Year |  | Summary Compensation Table Total for Current PEO (Stratmann)1 |  |  | Compensation Actually Paid to Current PEO (Stratmann)1 |  |  | Average Summary Compensation Total for Non-PEO NEOs1 |  |  | Average Compensation Actually Paid to Non-PEO NEOs1 |  |  | Value of Initial Fixed $100 Investment Based on Total Stockholder Return |  |  | Net Income (millions) |
2025 |  | $ | 5,954,405 |  |  | $ | 619,878 |  |  | $ | 2,754,647 |  |  | $ | 295,496 |  |  | $ | 216 |  |  | $ | (21.5 | )
2024 |  | $ | 858,889 |  |  | $ | 350,088 |  |  | $ | 424,706 |  |  | $ | 247,643 |  |  | $ | 37 |  |  | $ | (27.5 | )
2023 |  | $ | 868,068 |  |  | $ | 477,551 |  |  | $ | 407,966 |  |  | $ | 284,986 |  |  | $ | 48 |  |  | $ | (26.3 | )
Named Executive Officers, Footnote [Text Block] |  |
Fiscal Year |  | PEO(s) |  | Non-PEO NEOs
2025 |  | Phillip Stratmann |  | Robert Powers, Matthew Burdyny(b), Tracy Pagliara
2024 |  | Philipp Stratmann |  | Robert Powers, Matthew Burdyny, Joseph DiPietro(a)
2023 |  | Philipp Stratmann |  | Robert Powers, Joseph DiPietro
(a) | Effective April 26, 2024, Mr. DiPietro departed from the Company.
(b) | Effective June 2025, Mr. Burdyny separated from the Company.
PEO Total Compensation Amount | [1],[2] | $ 5,954,405 | $ 858,889 | $ 868,068
PEO Actually Paid Compensation Amount | [1],[2] | $ 619,878 | 350,088 | 477,551
Adjustment To PEO Compensation, Footnote [Text Block] |  | Compensation actually paid to our NEOs represents the “Total” compensation reported in the Summary Compensation Table for the applicable fiscal year (“FY”), as adjusted as follows:
Equity Adjustments(a) |  | PEO (Stratmann) |  |  | Average Non-PEO NEOs |  |  | PEO (Stratmann) |  |  | Average Non-PEO NEOs |  |  | PEO (Stratmann) |  |  | Average Non-PEO NEOs |
|  | 2023 |  |  | 2024 |  |  | 2025 |
Equity Adjustments(a) |  | PEO (Stratmann) |  |  | Average Non-PEO NEOs |  |  | PEO (Stratmann) |  |  | Average Non-PEO NEOs |  |  | PEO (Stratmann) |  |  | Average Non-PEO NEOs |
Summary Compensation Table Total |  | $ | 868,068 |  |  | $ | 407,966 |  |  | $ | 858,889 |  |  | $ | 424,706 |  |  | $ | 5,954,405 |  |  | $ | 2,754,647 |
Deduction for Amounts Reported under the “Stock Awards” and “Option Awards” Columns in the Summary Compensation Table for Applicable FY(a) |  | $ | (319,493 | ) |  | $ | (101,475 | ) |  | $ | (289,042 | ) |  | $ | (105,806 | ) |  | $ | (5,437,530 | ) |  | $ | (2,494,830 | )
Increase based on ASC 718 Fair Value of Awards Granted during Applicable FY that Remain Unvested as of Applicable FY End, determined as of Applicable FY End(a) |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
Increase based on ASC 718 Fair Value of Awards Granted during Applicable FY that Vested during Applicable FY, determined as of Vesting Date(a) |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
Increase/deduction for Awards Granted during Prior FY that were Outstanding and Unvested as of Applicable FY End, determined based on change in ASC 718 Fair Value from Prior FY End to Applicable FY End(a) |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
Increase/deduction for Awards Granted during Prior FY that Vested During Applicable FY, determined based on change in ASC 718 Fair Value from Prior FY End to Vesting Date(a) |  | $ | (43,514 | ) |  | $ | (11,971 | ) |  | $ | (75,366 | ) |  | $ | (17,787 | ) |  | $ | 123,423 |  |  | $ | 43,200 |
Deduction of ASC 718 Fair Value of Awards Granted during Prior FY that were Forfeited during Applicable FY, determined as of Prior FY End(a) |  | $ | (27,510 | ) |  | $ | (9,534 | ) |  | $ | (144,392 | ) |  | $ | (53,470 | ) |  | $ | (20,421 | ) |  | $ | (7,521 | )
Increase based on Incremental Fair Value of Options Modified during Applicable FY(a) |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
Deduction for Change in the Actuarial Present Values reported under the “Change in Pension Value and Nonqualified Deferred Compensation Earnings” Column of the Summary Compensation Table for Applicable FY(a) |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
Increase for Service Cost and, if applicable, Prior Service Cost for Pension Plans(a) |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
Total Equity Adjustments |  | $ | (390,517 | ) |  | $ | (122,980 | ) |  | $ | (508,801 | ) |  | $ | (177,062 | ) |  | $ | (5,334,527 | ) |  | $ | (2,459,152 | )
Compensation Actually Paid |  | $ | 477,551 |  |  | $ | 284,986 |  |  | $ | 350,088 |  |  | $ | 247,643 |  |  | $ | 619,878 |  |  | $ | 295,496 |
(a) | Fair value or change in fair value, as applicable, of equity awards in the “Compensation Actually Paid” columns was determined by reference to (1) for performance stock units (and RSUs, if any), the average of the high and low values of our Common Stock on applicable year-end date(s) or, in the case of vesting dates, the closing price on the applicable vesting date(s) multiplied by the probability of achievement as of the applicable date, and (2) for stock options, a value derived using the Black-Scholes option pricing model and the present value of dividends we expect to pay over the expected term of the award as of the applicable year-end or vesting date(s), determined based on the same methodology as used to determine grant date fair value of such stock options for financial statement purposes modified to obtain the values as of the relevant valuation dates. The Black-Scholes option pricing model assumptions were determined as follows: a) the average of the high and low values of our Common Stock on the applicable valuation date as of the current market price, b) in the case of in the money options, an expected term equal to the original ratio of expected term relative to the contractual term multiplied times the remaining term as of the applicable valuation date, and in the case of underwater stock options, an expected term set equal to the remaining term of the award, c) volatility based on the historical volatility of our stock price over a period equal to the expected term, and d) risk-free interest rates based on the implied yield on recently-issued U.S. Treasury zero-coupon bonds with a term comparable to the expected term. In all cases, these amounts were calculated in accordance with Accounting Standards Codification Topic No. 718, Compensation – Stock Compensation. For additional information on the assumptions used to calculate the valuation of the awards, see the Notes to the Company’s audited financial statements contained in the Company’s Annual Report on Form 10-K for the fiscal year ended April 30, 2025 and prior fiscal years.
Non-PEO NEO Average Total Compensation Amount | [1],[2] | $ 2,754,647 | 424,706 | 407,966
Non-PEO NEO Average Compensation Actually Paid Amount | [1],[2] | 295,496 | 247,643 | 284,986
Total Shareholder Return Amount |  | 216 | 37 | 48
Net Income (Loss) Attributable to Parent |  | $ (21,500,000) | $ (27,500,000) | $ (26,300,000)
PEO Name |  | Phillip Stratmann | Philipp Stratmann | Philipp Stratmann
PEO [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  | $ (5,334,527) | $ (508,801) | $ (390,517)
PEO [Member] | Deduction for Amounts Reported Under the Stock Awards and Option Awards Columns in the Summary Compensation Table For Applicable FY [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  | (5,437,530) | (289,042) | (319,493)
PEO [Member] | Increase Fair Value of Awards Granted During Applicable FY that Remain Unvested as of Applicable FY End Determined as of Applicable FY End [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  |  |  |
PEO [Member] | Fair Value of Awards Granted During Applicable FY that Vested During Applicable FY Determined as of Vesting Date [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  |  |  |
PEO [Member] | Awards Granted During Prior FY That Were Outstanding And Unvested As Of Applicable FY End Determined Fair Value From Prior FY End To Applicable FY End [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  |  |  |
PEO [Member] | Awards Granted During Prior FY that Vested During Applicable FY Determined Based on Change in Fair Value from Prior FY End to Vesting Date [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  | 123,423 | (75,366) | (43,514)
PEO [Member] | Fair Value of Awards Granted During Prior FY that Were Forfeited During Applicable FY Determined as of Prior FY End [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  | (20,421) | (144,392) | (27,510)
PEO [Member] | Increase Based on Incremental Fair Value of Options Modified During Applicable FY [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  |  |  |
PEO [Member] | Actuarial Present Values Reported Under the Change in Pension Value and Nonqualified Deferred Compensation Earnings Column of the Summary Compensation Table for Applicable FY [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  |  |  |
PEO [Member] | Increase for Service Cost and if Applicable Prior Service Cost for Pension Plans [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  |  |  |
Non-PEO NEO [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  | (2,459,152) | (177,062) | (122,980)
Non-PEO NEO [Member] | Deduction for Amounts Reported Under the Stock Awards and Option Awards Columns in the Summary Compensation Table For Applicable FY [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  | (2,494,830) | (105,806) | (101,475)
Non-PEO NEO [Member] | Increase Fair Value of Awards Granted During Applicable FY that Remain Unvested as of Applicable FY End Determined as of Applicable FY End [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  |  |  |
Non-PEO NEO [Member] | Fair Value of Awards Granted During Applicable FY that Vested During Applicable FY Determined as of Vesting Date [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  |  |  |
Non-PEO NEO [Member] | Awards Granted During Prior FY That Were Outstanding And Unvested As Of Applicable FY End Determined Fair Value From Prior FY End To Applicable FY End [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  |  |  |
Non-PEO NEO [Member] | Awards Granted During Prior FY that Vested During Applicable FY Determined Based on Change in Fair Value from Prior FY End to Vesting Date [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  | 43,200 | (17,787) | (11,971)
Non-PEO NEO [Member] | Fair Value of Awards Granted During Prior FY that Were Forfeited During Applicable FY Determined as of Prior FY End [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  | (7,521) | (53,470) | (9,534)
Non-PEO NEO [Member] | Increase Based on Incremental Fair Value of Options Modified During Applicable FY [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  |  |  |
Non-PEO NEO [Member] | Actuarial Present Values Reported Under the Change in Pension Value and Nonqualified Deferred Compensation Earnings Column of the Summary Compensation Table for Applicable FY [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  |  |  |
Non-PEO NEO [Member] | Increase for Service Cost and if Applicable Prior Service Cost for Pension Plans [Member] |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |
Total Equity Adjustments |  |  |  |
[1] | Amounts represent compensation actually paid to our Principal Executive Officers (“PEO”) and the average compensation actually paid to our non-PEO NEOs for the relevant fiscal year, as determined under SEC rules (and described below), which includes the individuals indicated in the table below for each fiscal year:
[2] | Fair value or change in fair value, as applicable, of equity awards in the “Compensation Actually Paid” columns was determined by reference to (1) for performance stock units (and RSUs, if any), the average of the high and low values of our Common Stock on applicable year-end date(s) or, in the case of vesting dates, the closing price on the applicable vesting date(s) multiplied by the probability of achievement as of the applicable date, and (2) for stock options, a value derived using the Black-Scholes option pricing model and the present value of dividends we expect to pay over the expected term of the award as of the applicable year-end or vesting date(s), determined based on the same methodology as used to determine grant date fair value of such stock options for financial statement purposes modified to obtain the values as of the relevant valuation dates. The Black-Scholes option pricing model assumptions were determined as follows: a) the average of the high and low values of our Common Stock on the applicable valuation date as of the current market price, b) in the case of in the money options, an expected term equal to the original ratio of expected term relative to the contractual term multiplied times the remaining term as of the applicable valuation date, and in the case of underwater stock options, an expected term set equal to the remaining term of the award, c) volatility based on the historical volatility of our stock price over a period equal to the expected term, and d) risk-free interest rates based on the implied yield on recently-issued U.S. Treasury zero-coupon bonds with a term comparable to the expected term. In all cases, these amounts were calculated in accordance with Accounting Standards Codification Topic No. 718, Compensation – Stock Compensation. For additional information on the assumptions used to calculate the valuation of the awards, see the Notes to the Company’s audited financial statements contained in the Company’s Annual Report on Form 10-K for the fiscal year ended April 30, 2025 and prior fiscal years.

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToPeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_NamedExecutiveOfficersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_NonPeoNeoAvgCompActuallyPaidAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_NonPeoNeoAvgTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_PeoActuallyPaidCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_PeoName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_PeoTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTable
Namespace Prefix: | ecd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 60 -Name Accounting Standards Codification -Section 65 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476176/805-60-65-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 323 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (g)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478666/740-323-65-2 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482765/220-10-50-6 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-3 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-1 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480175/815-40-65-1 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-8 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-11 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-11 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-4 Reference 17: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479168/946-830-55-10 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section 45 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479105/946-220-45-7 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(9)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(1)(d)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 23: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 31: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 32: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 60B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B Reference 33: http://www.xbrl.org/2003/role/disclosureRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483499/205-20-50-7 Reference 34: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 35: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-1A Reference 36: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-1B Reference 37: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_PeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=OPTT_DeductionForAmountsReportedUnderTheStockAwardsAndOptionAwardsColumnsInTheSummaryCompensationTableForApplicableFYMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=OPTT_IncreaseFairValueOfAwardsGrantedDuringApplicableFyThatRemainUnvestedAsOfApplicableFyEndDeterminedAsOfApplicableFyEndMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=OPTT_FairValueOfAwardsGrantedDuringApplicableFyThatVestedDuringApplicableFyDeterminedAsOfVestingDateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=OPTT_AwardsGrantedDuringPriorFyThatWereOutstandingAndUnvestedAsOfApplicableFyEndDeterminedFairValueFromPriorFyEndToApplicableFyEndMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=OPTT_AwardsGrantedDuringPriorFyThatVestedDuringApplicableFyDeterminedBasedOnChangeInFairValueFromPriorFyEndToVestingDateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=OPTT_FairValueOfAwardsGrantedDuringPriorFyThatWereForfeitedDuringApplicableFyDeterminedAsOfPriorFyEndMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=OPTT_IncreaseBasedOnIncrementalFairValueOfOptionsModifiedDuringApplicableFyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=OPTT_ActuarialPresentValuesReportedUnderTheChangeInPensionValueAndNonqualifiedDeferredCompensationEarningsColumnOfTheSummaryCompensationTableForApplicableFyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=OPTT_IncreaseForServiceCostAndIfApplicablePriorServiceCostForPensionPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_NonPeoNeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |