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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, 2018	$ 125,183	$ 35	$ 324,209	$ (5)	$ (199,056)
Beginning balance at Dec. 31, 2018		35,432,460
Equity-based compensation	3,500		3,500
Net loss	(29,582)				(29,582)
Forfeiture of restricted stock awards units		(17,546)
Unrealized (loss) gain on available-for-sale securities	12			12
Ending balance at Mar. 31, 2019	99,113	$ 35	327,709	7	(228,638)
Ending balance, units at Mar. 31, 2019		35,414,914
Beginning balance at Dec. 31, 2019	80,048	$ 48	396,278	1	(316,279)
Beginning balance at Dec. 31, 2019		48,283,270
Equity-based compensation	3,104		3,104
Net loss	(26,694)				(26,694)
Vesting of restricted stock units		121,975
Forfeiture of restricted stock awards units		(38,822)
Unrealized (loss) gain on available-for-sale securities	(2)			(2)
Ending balance at Mar. 31, 2020	$ 56,456	$ 48	$ 399,382	$ (1)	$ (342,973)
Ending balance, units at Mar. 31, 2020		48,366,423

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