Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Comprehensive Deficit
BALANCE, at beginning of period (in shares) at Dec. 31, 2021		54,259,000
BALANCE, at beginning of period at Dec. 31, 2021	$ 100,560	$ 54	$ 352,779	$ (252,273)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Non-cash compensation recognized on stock options and employee stock purchase plan ("ESPP")	86		86
Restricted stock grants, net of cancellations (in shares)		1,187,000
Restricted stock grants, net of cancellations	4,862	$ 1	4,861
Cancellation of shares for payment of withholding tax (in shares)		(406,000)
Cancellation of shares for payment of withholding tax	(1,218)		(1,218)
ESPP (in shares)		17,000
ESPP shares issued	40		40
Exercise of stock options (in shares)		9,000
Exercise of stock options	19		19
Common shares issued in stock offering, net offering costs (in shares)		1,132,000
Common shares issued in stock offering, net of offering costs	1,309	$ 1	1,308
Net loss	$ (29,279)			(29,279)
BALANCE, at end of period (in shares) at Dec. 31, 2022	56,197,910	56,198,000
BALANCE, at end of period at Dec. 31, 2022	$ 76,379	$ 56	357,875	(281,552)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Non-cash compensation recognized on stock options and employee stock purchase plan ("ESPP")	30		30
Restricted stock grants, net of cancellations (in shares)		1,819,000
Restricted stock grants, net of cancellations	4,806	$ 2	4,804
Cancellation of shares for payment of withholding tax (in shares)		(374,000)
Cancellation of shares for payment of withholding tax	(496)		(496)
ESPP (in shares)		15,000
ESPP shares issued	$ 15		15
Exercise of stock options (in shares)	0
Common shares issued in settlement and prepayment of notes payable (in shares)		17,126,000
Common shares issued in settlement and prepayment of notes payable	$ 19,052	$ 17	19,035
Net loss	$ (24,396)			(24,396)
BALANCE, at end of period (in shares) at Dec. 31, 2023	74,783,834	74,784,000
BALANCE, at end of period at Dec. 31, 2023	$ 75,390	$ 75	$ 381,263	$ (305,948)