Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Other Comprehensive Gain/(Loss) [Member]	Accumulated Deficit [Member]	Noncontrolling Interest [Member]
Beginning balance at Dec. 31, 2021	$ 109,126	$ 28	$ 481,832	$ (263)	$ (372,296)	$ (175)
Beginning balance, Shares at Dec. 31, 2021		27,793,035
Issuance of common stock upon release of restricted stock units, Shares		2,500
Issuance of common stock from at-the-market offerings, net of offering costs	1,480		1,480
Issuance of common stock from at the market offerings, net of offering costs, Shares		260,455
Issuance of common stock upon exercise of stock options	1		1
Issuance of common stock upon exercise of stock options, Shares		259
Stock-based compensation	417		417
Net unrealized loss on investments, net of tax	(496)			(496)
Net loss	(12,154)				(12,153)	(1)
Ending balance at Mar. 31, 2022	98,374	$ 28	483,730	(759)	(384,449)	(176)
Ending balance, Shares at Mar. 31, 2022		28,056,249
Beginning balance at Dec. 31, 2022	71,284	$ 29	489,502	(433)	(417,634)	(180)
Beginning balance, Shares at Dec. 31, 2022		29,498,488
Issuance of common stock upon release of restricted stock units, Shares		22,111
Issuance of common stock from underwritten follow-on offering, net of offering costs	48,073	$ 23	48,050
Issuance of common stock from underwritten follow-on offering, net of offering costs, Shares		23,125,000
Issuance of common stock from at-the-market offerings, net of offering costs	1,489	$ 1	1,488
Issuance of common stock from at the market offerings, net of offering costs, Shares		694,012
Stock-based compensation	619		619
Net unrealized loss on investments, net of tax	185			185
Net loss	(11,952)				(11,951)	(1)
Ending balance at Mar. 31, 2023	$ 109,698	$ 53	$ 539,659	$ (248)	$ (429,585)	$ (181)
Ending balance, Shares at Mar. 31, 2023		53,339,611