Consolidated Statements of Changes in Stockholders’ Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings/(Accumulated Deficit)
Beginning Balances (in shares) at Dec. 31, 2021		23,460,212
Beginning Balance at Dec. 31, 2021	$ 147,301	$ 23	$ (47,692)	$ 102,106	$ 92,864
Beginning Balances (in shares) at Dec. 31, 2021			(4,618,146)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation (in shares)		389,312
Stock-based compensation	1,981	$ 1		1,980
Repurchase of common shares to satisfy tax withholdings (in shares)		(61,205)
Repurchase of common shares to satisfy tax withholdings	(388)			(388)
Accrued dividends cancelled on common stock	2				2
Net loss	(8,917)				(8,917)
Ending Balances (in shares) at Dec. 31, 2022		23,788,319
Ending Balance at Dec. 31, 2022	$ 139,979	$ 24	$ (47,692)	103,698	83,949
Ending Balances (in shares) at Dec. 31, 2022	(4,618,146)		(4,618,146)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation (in shares)		572,056
Stock-based compensation	$ 2,648			2,648
Repurchase of common shares to satisfy tax withholdings (in shares)		(117,175)
Repurchase of common shares to satisfy tax withholdings	(230)			(230)
Issuance of common stock upon conversion of preferred stock (in shares)		5,362,926
Issuance of common stock upon conversion of preferred stock	18,926	$ 5		18,921
Issuance of common stock related to PIPE Investment, net of offering costs (in shares)		3,842,315
Issuance of common stock related to PIPE Investment, net of offering costs	15,220	$ 4		15,216
Issuance of common stock pursuant to Arq Acquisition, net of offering costs (in shares)		3,814,864
Issuance of common stock pursuant to Arq Acquisition, net of offering costs	12,437	$ 4		12,433
Issuance of common stock to related party (in shares)		527,779
Issuance of common stock to related party	1,000	$ 1		999
Issuance of warrant	826			826
Preferred stock dividends declared on redeemable preferred stock	(157)				(157)
Net loss	(12,249)				(12,249)
Ending Balances (in shares) at Dec. 31, 2023		37,791,084
Ending Balance at Dec. 31, 2023	$ 178,400	$ 38	$ (47,692)	$ 154,511	$ 71,543
Ending Balances (in shares) at Dec. 31, 2023	(4,618,146)		(4,618,146)