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Stock Option Plan - Schedule of stock option activity (Details) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
2010 Plan |  |
Shares |  |
Beginning balance (in shares) | 1,916 |
Granted, (in shares) | 0 |
Exercised (in shares) | 0 |
Forfeited (in shares) | 0 |
Expired/Cancelled (in shares) | (747) |
Ending balance (in shares) | 1,169 | 1,916
Options exercisable (in shares) | 1,169 |
Options vested (in shares) | 1,169 |
Weighted- Average Exercise Price per Share($) |  |
Beginning balance (in dollars per share) | $ 1,033.97 |
Granted (in dollars per share) | 0 |
Exercised (in dollars per share) | 0 |
Forfeited (in dollars per share) | 0 |
Expired/Cancelled (in dollars per share) | 508.47 |
Ending balance (in dollars per share) | 1,369.78 | $ 1,033.97
Options exercisable (in dollars per share) | 1,369.78 |
Options vested (in dollars per share) | $ 1,369.78 |
Weighted- Average Remaining Contractual Term (Years) |  |
Outstanding, weighted-average remaining contractual term | 2 years 11 months 8 days | 2 years 6 months 14 days
Options exercisable, weighted average remaining contractual term | 2 years 11 months 8 days |
Options vested, weighted average remaining contractual term | 2 years 11 months 8 days |
Aggregate Intrinsic Value($) |  |
Outstanding | $ 0 | $ 0
Exercisable | 0 |
Vested | $ 0 |
2020 Plan |  |
Shares |  |
Beginning balance (in shares) | 4,743 |
Granted, (in shares) | 0 |
Exercised (in shares) | 0 |
Forfeited (in shares) | 0 |
Expired/Cancelled (in shares) | (10) |
Ending balance (in shares) | 4,733 | 4,743
Options exercisable (in shares) | 3,746 |
Options vested (in shares) | 3,746 |
Weighted- Average Exercise Price per Share($) |  |
Beginning balance (in dollars per share) | $ 3,874.89 |
Granted (in dollars per share) | 0 |
Exercised (in dollars per share) | 0 |
Forfeited (in dollars per share) | 0 |
Expired/Cancelled (in dollars per share) | 2,708 |
Ending balance (in dollars per share) | 3,877.35 | $ 3,874.89
Options exercisable (in dollars per share) | 4,879.38 |
Options vested (in dollars per share) | $ 4,879.38 |
Weighted- Average Remaining Contractual Term (Years) |  |
Outstanding, weighted-average remaining contractual term | 5 years 11 months 12 days | 6 years 8 months 4 days
Options exercisable, weighted average remaining contractual term | 5 years 8 months 19 days |
Options vested, weighted average remaining contractual term | 5 years 8 months 19 days |
Aggregate Intrinsic Value($) |  |
Outstanding | $ 0 | $ 0
Exercisable | 0 |
Vested | $ 0 |

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- Definition Share Based Compensation Arrangement by Share Based Payment Award, Options, Intrinsic Value + References No definition available. + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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