Stockholders' Equity - Narrative (Details) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) vote $ / shares shares	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) installment vote $ / shares shares	Sep. 30, 2024 USD ($)	Dec. 31, 2024 $ / shares shares	Feb. 12, 2019 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation \| $	$ 0.3	$ 0.2	$ 0.8	$ 0.7
Unrecognized compensation cost related to nonvested stock issuances \| $	$ 1.1		$ 1.1
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition			1 year 10 months 24 days
Total intrinsic value of stock options \| $			$ 0.4	0.1
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of annual installments \| installment			4
Vesting period			4 years
Share-based compensation arrangement by share-based payment award, equity instruments other than options, aggregate intrinsic value, vested \| $			$ 1.6	$ 1.5
Restricted stock units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting range, percentage			60.00%
Restricted stock units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting range, percentage			120.00%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of annual installments \| installment			4
Vesting period			4 years
Omnibus incentive plan stock option expiration period			10 years
Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, par value (in dollars per share) \| $ / shares	$ 0.01		$ 0.01		$ 0.01
Common stock, number of votes per share \| vote	1		1
Common stock, shares issued (in shares) \| shares	9,953		9,953		9,774
Common Class A \| Two Thousand Nineteen Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares) \| shares						2,500
Common stock, shares issued (in shares) \| shares	1,300		1,300
Common Class B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, par value (in dollars per share) \| $ / shares	$ 0.01		$ 0.01		$ 0.01
Common stock, number of votes per share \| vote	15		15
Common stock, shares issued (in shares) \| shares	220		220		220

Comstock Holding Companies, Inc. 10-Q