Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Registered Direct Offering [Member] Common Stock [Member]	Registered Direct Offering [Member] Additional Paid-in Capital [Member]	Registered Direct Offering [Member] Retained Earnings [Member]	Registered Direct Offering [Member]	At-the-market Offering [Member] Common Stock [Member]	At-the-market Offering [Member] Additional Paid-in Capital [Member]	At-the-market Offering [Member] Retained Earnings [Member]	At-the-market Offering [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2021									21,039,594
Balance at Dec. 31, 2021									$ 2	$ 582,025	$ (539,805)	$ 42,222
Stock-based compensation									0	620	0	620
Net loss									$ 0	0	(13,057)	(13,057)
Issuance of common stock, net (in shares)	3,185,216				54,763
Issuance of common stock, net	$ 0	$ 9,291	$ 0	$ 9,291	$ 0	$ 123	$ 0	$ 123
Balance (in shares) at Mar. 31, 2022									24,279,573
Balance at Mar. 31, 2022									$ 2	592,059	(552,862)	39,199
Balance (in shares) at Dec. 31, 2022									59,844,850
Balance at Dec. 31, 2022									$ 6	626,778	(616,127)	10,657
Stock-based compensation									0	688	0	688
Net loss									$ 0	0	(49,956)	(49,956)
Balance (in shares) at Mar. 31, 2023									59,844,850
Balance at Mar. 31, 2023									$ 6	$ 627,466	$ (666,083)	$ (38,611)