CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Beginning balance, value at Dec. 31, 2020	$ (124,001)	$ 6	$ 754,938	$ (878,945)
Beginning balance, shares at Dec. 31, 2020		5,996,000
Shares issued for sale of common stock, net of cost	150,899	$ 2	150,897
Shares issued for sale of common stock, net of cost, shares		1,857,000
Shares issued for exercise of warrants, net of cashless exercises	50		50
Shares issued for exercise of warrants, net of cashless exercises (in shares)		10,000
Shares issued for vested restricted stock units (in shares)		1,000
Share-based compensation	2,957		2,957
Net income (loss)	(39,383)			(39,383)
Ending balance, value at Mar. 31, 2021	(9,478)	$ 8	908,842	(918,328)
Ending balance, shares at Mar. 31, 2021		7,864,000
Beginning balance, value at Dec. 31, 2020	(124,001)	$ 6	754,938	(878,945)
Beginning balance, shares at Dec. 31, 2020		5,996,000
Net income (loss)	(82,035)
Ending balance, value at Jun. 30, 2021	(49,074)	$ 8	911,898	(960,980)
Ending balance, shares at Jun. 30, 2021		7,902,000
Beginning balance, value at Mar. 31, 2021	(9,478)	$ 8	908,842	(918,328)
Beginning balance, shares at Mar. 31, 2021		7,864,000
Shares issued for sale of common stock, net of cost	163		163
Shares issued for sale of common stock, net of cost, shares		3,000
Shares issued for exercise of warrants, net of cashless exercises	228		228
Shares issued for exercise of warrants, net of cashless exercises (in shares)		12,000
Shares issued for exercise of options	21		21
Shares issued for exercise of options (in shares)		1,000
Shares issued for vested restricted stock units (in shares)		19,000
Shares issued for sale of common stock related to employee stock purchase plan	134		134
Shares issued for sale of common stock related to employee stock purchase plan (in shares)		3,000
Share-based compensation	2,510		2,510
Net income (loss)	(42,652)			(42,652)
Ending balance, value at Jun. 30, 2021	(49,074)	$ 8	911,898	(960,980)
Ending balance, shares at Jun. 30, 2021		7,902,000
Beginning balance, value at Dec. 31, 2021	$ (93,621)	$ 9	957,730	(1,051,360)
Beginning balance, shares at Dec. 31, 2021	8,598,000	8,598,000
Shares issued for vested restricted stock units (in shares)		71,000
Share-based compensation	$ 2,062		2,062
Net income (loss)	(49,021)			(49,021)
Ending balance, value at Mar. 31, 2022	(140,580)	$ 9	959,792	(1,100,381)
Ending balance, shares at Mar. 31, 2022		8,669,000
Beginning balance, value at Dec. 31, 2021	$ (93,621)	$ 9	957,730	(1,051,360)
Beginning balance, shares at Dec. 31, 2021	8,598,000	8,598,000
Net income (loss)	$ 63,260
Ending balance, value at Jun. 30, 2022	$ (26,066)	$ 9	962,025	(988,100)
Ending balance, shares at Jun. 30, 2022	8,860,000	8,860,000
Beginning balance, value at Mar. 31, 2022	$ (140,580)	$ 9	959,792	(1,100,381)
Beginning balance, shares at Mar. 31, 2022		8,669,000
Shares issued for rounding up of fractional shares in connection with the reverse stock split (in shares)		142,000
Shares issued for vested restricted stock units (in shares)		44,000
Shares issued for sale of common stock related to employee stock purchase plan	14		14
Shares issued for sale of common stock related to employee stock purchase plan (in shares)		5,000
Share-based compensation	2,219		2,219
Net income (loss)	112,281			112,281
Ending balance, value at Jun. 30, 2022	$ (26,066)	$ 9	$ 962,025	$ (988,100)
Ending balance, shares at Jun. 30, 2022	8,860,000	8,860,000