Stock-Based Compensation - Stock-Based Compensation (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Share-based Payment Arrangement, Noncash Expense | $ 56,889 | $ 50,582 | $ 150,655 | $ 132,312 |
| Stock Options | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Compensation cost not yet recognized, amount | $ 506,958 | $ 506,958 | ||
| Compensation cost not yet recognized, period for recognition | 2 years 3 days | |||
| Tecogen | Amended Plan | Stock Options | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Shares of common stock reserved for future issuance | 3,838,750 | 3,838,750 | ||
| Number of shares remaining available for future issuance | 710,068 | 710,068 | ||
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- Definition Aggregate number of common shares reserved for future issuance. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of noncash expense for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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