Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2019	$ 80,048	$ 48	$ 396,278	$ 1	$ (316,279)
Beginning balance, units at Dec. 31, 2019		48,283,270
Equity-based compensation	6,347		6,347
Net loss	(45,681)				(45,681)
Vesting of restricted stock, units		121,975
Forfeiture of restricted stock awards units		(41,153)
Unrealized gain (loss) on available for sale securities	(1)			(1)
Ending balance at Jun. 30, 2020	40,713	$ 48	402,625		(361,960)
Ending balance, units at Jun. 30, 2020		48,364,092
Beginning balance at Mar. 31, 2020	56,456	$ 48	399,382	(1)	(342,973)
Beginning balance, units at Mar. 31, 2020		48,366,423
Equity-based compensation	3,243		3,243
Net loss	(18,987)				(18,987)
Forfeiture of restricted stock awards units		(2,331)
Unrealized gain (loss) on available for sale securities	1			1
Ending balance at Jun. 30, 2020	40,713	$ 48	402,625		(361,960)
Ending balance, units at Jun. 30, 2020		48,364,092
Beginning balance at Dec. 31, 2020	132,086	$ 87	536,568		(404,569)
Beginning balance, units at Dec. 31, 2020		87,052,323
Equity-based compensation	6,542		6,542
Sale of common stock, net of issuance costs	134,878	$ 25	134,853
Sale of common stock, net of issuance costs, shares		25,000,000
Exercise of stock options	38		38
Exercise of stock options, shares		10,625
Net loss	(35,595)				(35,595)
Vesting of restricted stock, units		419,193
Forfeiture of restricted stock awards units		(27,820)
Unrealized gain (loss) on available for sale securities	(11)			(11)
Ending balance at Jun. 30, 2021	237,938	$ 112	678,001	(11)	(440,164)
Ending balance, units at Jun. 30, 2021		112,454,321
Beginning balance at Mar. 31, 2021	253,000	$ 112	674,357		(421,469)
Beginning balance, units at Mar. 31, 2021		112,446,896
Equity-based compensation	3,635		3,635
Exercise of stock options	9		9
Exercise of stock options, shares		2,475
Net loss	(18,695)				(18,695)
Vesting of restricted stock, units		6,262
Forfeiture of restricted stock awards units		(1,312)
Unrealized gain (loss) on available for sale securities	(11)			(11)
Ending balance at Jun. 30, 2021	$ 237,938	$ 112	$ 678,001	$ (11)	$ (440,164)
Ending balance, units at Jun. 30, 2021		112,454,321