Condensed Consolidated Statements of Changes in Stockholders’ Deficit (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2018		4,219,606
Beginning balance at Dec. 31, 2018	$ (107,539)	$ 0	$ 21,833	$ (128,632)	$ (740)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	435		435
Other comprehensive income	7				7
Net loss	(17,717)			(17,717)
Ending balance (in shares) at Sep. 30, 2019		4,219,606
Ending balance at Sep. 30, 2019	(124,814)	$ 0	22,268	(146,349)	(733)
Beginning balance (in shares) at Jun. 30, 2019		4,219,606
Beginning balance at Jun. 30, 2019	(119,532)	$ 0	22,109	(140,903)	(738)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	159		159
Other comprehensive income	5				5
Net loss	(5,446)			(5,446)
Ending balance (in shares) at Sep. 30, 2019		4,219,606
Ending balance at Sep. 30, 2019	$ (124,814)	$ 0	22,268	(146,349)	(733)
Beginning balance (in shares) at Dec. 31, 2019	4,220,998	4,220,998
Beginning balance at Dec. 31, 2019	$ (122,253)	$ 0	22,404	(143,915)	(742)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised (in shares)	6,821	6,821
Stock options exercised	$ 27		27
Restricted stocks issued (in shares)	127,501
Stock-based compensation	$ 820		820
Conversion of shares in connection with the Reverse Merger (in shares)		23,933,949
Conversion of shares in connection with the Reverse Merger	85,658	$ 3	85,655
Shares redeemed (in shares)		(52,773)
Shares redeemed	(211)		(211)
Shares issued in connection with the Reverse Merger (in shares)		1,650,000
Shares issued in connection with the Reverse Merger	(50)		(50)
Issuance of common stock, net (in shares)		5,380,000
Issuance of common stock, net	19,741	$ 1	19,740
Other comprehensive income	(23)				(23)
Net loss	$ (13,197)			(13,197)
Ending balance (in shares) at Sep. 30, 2020	35,266,496	35,266,496
Ending balance at Sep. 30, 2020	$ (29,488)	$ 4	128,385	(157,112)	(765)
Beginning balance (in shares) at Feb. 11, 2020	50,325,662
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares redeemed (in shares)	(52,773)
Shares issued in connection with the Reverse Merger (in shares)	1,650,000
Ending balance (in shares) at Feb. 12, 2020	4,171,571
Beginning balance (in shares) at Jun. 30, 2020		35,135,520
Beginning balance at Jun. 30, 2020	$ (23,352)	$ 4	127,787	(150,372)	(771)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised (in shares)	3,475	3,475
Stock options exercised	$ 14		14
Restricted stocks issued (in shares)	127,501
Stock-based compensation	$ 584		584
Other comprehensive income	6				6
Net loss	$ (6,740)			(6,740)
Ending balance (in shares) at Sep. 30, 2020	35,266,496	35,266,496
Ending balance at Sep. 30, 2020	$ (29,488)	$ 4	$ 128,385	$ (157,112)	$ (765)