CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Common Stock Restricted stock units	Common Stock Performance stock units	Additional Paid-in Capital	Accumulated Deficit
Balances (in shares) at Dec. 31, 2020		28,392,000
Balances at Dec. 31, 2020	$ 55,514	$ 3			$ 483,456	$ (427,945)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock in conjunction with vesting of restricted stock units or performance stock units, net of employee's withholding liability (in shares)			211,000	13,000
Issuance of common stock in conjunction with vesting of restricted stock units, net of employee's withholding liability	(388)				(388)
Issuance of common stock upon exercise of warrant (in shares)		347,000
Stock-based compensation	772				772
Issuance of common stock upon exercise of options (in shares)		73,000
Issuance of common stock in connection with stock offerings (in shares)		14,400,000
Issuance of common stock in connection with stock offerings	44,861	$ 1			44,860
Net income (loss)	4,544					4,544
Comprehensive loss (income)	4,544
Balances (in shares) at Mar. 31, 2021		43,436,000
Balances at Mar. 31, 2021	105,303	$ 4			528,700	(423,401)
Balances (in shares) at Dec. 31, 2020		28,392,000
Balances at Dec. 31, 2020	55,514	$ 3			483,456	(427,945)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(9,625)
Comprehensive loss (income)	(9,625)
Balances (in shares) at Jun. 30, 2021		44,494,000
Balances at Jun. 30, 2021	92,265	$ 4			529,831	(437,570)
Balances (in shares) at Mar. 31, 2021		43,436,000
Balances at Mar. 31, 2021	105,303	$ 4			528,700	(423,401)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock in conjunction with vesting of restricted stock units or performance stock units, net of employee's withholding liability (in shares)		227,000
Issuance of common stock in conjunction with vesting of restricted stock units, net of employee's withholding liability	(19)				(19)
Issuance of common stock upon exercise of warrant (in shares)		845,000
Stock-based compensation	957				957
Issuance of common stock upon exercise of options	193				193
Issuance of common stock under employee stock purchase plan (in shares)		4,000
Stock split fractional shares settlement (in shares)		(18,000)
Net income (loss)	(14,169)					(14,169)
Comprehensive loss (income)	(14,169)
Balances (in shares) at Jun. 30, 2021		44,494,000
Balances at Jun. 30, 2021	$ 92,265	$ 4			529,831	(437,570)
Balances (in shares) at Dec. 31, 2021	44,640,444	44,640,000
Balances at Dec. 31, 2021	$ 102,414	$ 4			531,636	(429,226)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock in conjunction with vesting of restricted stock units or performance stock units, net of employee's withholding liability (in shares)			307,000
Issuance of common stock in conjunction with vesting of restricted stock units, net of employee's withholding liability	(598)				(598)
Issuance of common stock upon exercise of warrant (in shares)		388,000
Stock-based compensation	982				982
Net income (loss)	9,064					9,064
Comprehensive loss (income)	9,064
Balances (in shares) at Mar. 31, 2022		45,335,000
Balances at Mar. 31, 2022	$ 111,862	$ 4			532,020	(420,162)
Balances (in shares) at Dec. 31, 2021	44,640,444	44,640,000
Balances at Dec. 31, 2021	$ 102,414	$ 4			531,636	(429,226)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	16,898
Comprehensive loss (income)	$ 16,898
Balances (in shares) at Jun. 30, 2022	48,172,055	48,172,000
Balances at Jun. 30, 2022	$ 128,369	$ 5			540,692	(412,328)
Balances (in shares) at Mar. 31, 2022		45,335,000
Balances at Mar. 31, 2022	111,862	$ 4			532,020	(420,162)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock in conjunction with vesting of restricted stock units or performance stock units, net of employee's withholding liability (in shares)			373,000
Issuance of common stock in conjunction with vesting of restricted stock units, net of employee's withholding liability	(81)				(81)
Stock-based compensation	1,734				1,734
Issuance of common stock in connection with stock offerings (in shares)		2,464,000
Issuance of common stock in connection with stock offerings	7,020	$ 1			7,019
Net income (loss)	7,834					7,834
Comprehensive loss (income)	$ 7,834					7,834
Balances (in shares) at Jun. 30, 2022	48,172,055	48,172,000
Balances at Jun. 30, 2022	$ 128,369	$ 5			$ 540,692	$ (412,328)