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v3.25.4

Income Taxes - Reconciliation Of Effective Rate (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Amount |  |  |
U.S. Federal statutory tax rate | $ (6,777,357) | $ (15,443,013) | $ (10,531,306)
State and local income taxes, net of federal income tax effect | 0 | 0 | 0
Effect of changes in tax laws or rates enacted in the current period | 0 | 0 | 0
Effect of cross-border tax laws | 0 | 0 | 265,769
Tax credits | (209,472) |  | (36,666)
Incentive stock options | 280,906 | 700,490 | 595,925
Stock-based compensation (windfalls) shortfalls | (190,318) | 103,096 | 109,839
Other | 8,694 | 7,106 | 349,123
Changes in unrecognized tax benefits | 0 | 0 | 0
Executive compensation limitation | (166,112) | 1,048,277 | 1,730,628
Expirations, forfeitures and cancellations | 693,946 | 113,056 | 21,098
Net Effective Tax Rate | $ 0 | $ 0 | $ 0
Tax Jurisdiction of Domicile [Extensible Enumeration] | U.S. | U.S. | U.S.
Effective income tax rate reconciliation, Percent |  |  |
U.S. Federal statutory tax rate | 21.00% | 21.00% | 21.00%
State and local income taxes, net of federal income tax effect | 0.00% | 0.00% | 0.00%
Effect of changes in tax laws or rates enacted in the current period | 0.00% | 0.00% | 0.00%
Effect of cross-border tax laws | 0.00% | 0.00% | (0.50%)
Tax credits | 0.60% | 0.00% | 0.10%
Incentive stock options | (0.90%) | (1.00%) | (1.20%)
Stock-based compensation (windfalls) shortfalls | 0.60% | (0.10%) | (0.20%)
Other | 0.00% | 0.00% | (0.70%)
Changes in unrecognized tax benefits | 0.00% | 0.00% | 0.00%
Executive compensation limitation | 0.50% | (1.40%) | (3.50%)
Expirations, forfeitures and cancellations | (2.20%) | (0.20%) | 0.00%
Net Effective Tax Rate | 0.00% | 0.00% | 0.00%
U.S. |  |  |
Amount |  |  |
Change in valuation allowance | $ 6,002,161 | $ 13,257,284 | $ 7,207,958
Other | $ 195,522 | $ 72,180 | $ 53,793
Effective income tax rate reconciliation, Percent |  |  |
Changes in valuation allowance | (18.60%) | (18.00%) | (14.40%)
Other | (0.50%) | (0.10%) | (0.10%)
Germany |  |  |
Amount |  |  |
Foreign tax effects | $ 17,506 | $ (17,414) | $ 241,597
Effective income tax rate reconciliation, Percent |  |  |
Foreign tax effects | (0.10%) | 0.00% | (0.50%)
Japan |  |  |
Amount |  |  |
NOL expiration |  |  | $ 1,053,211
Change in valuation allowance | $ 234,992 | $ 175,589 | (676,708)
Other | $ (90,469) | $ (16,651) | $ (384,262)
Effective income tax rate reconciliation, Percent |  |  |
NOL expiration | 0.00% |  | (2.10%)
Changes in valuation allowance | (0.70%) | (0.20%) | 1.30%
Other | 0.30% | 0.00% | 0.80%

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.1.Q1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479360/740-10-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 + Details
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