Stock-Based Compensation - Weighted Average Assumptions (Details) - Stock Options	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%
Expected life	6 years 3 months	6 years 3 months
Risk-free interest rate	4.22%	4.28%
Expected volatility	42.33%	40.17%

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.

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+ Details

TECOGEN INC. 10-Q