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	139		139
Other comprehensive income	(27)				(27)
Net loss	(6,370)			(6,370)
Ending balance (in shares) at Mar. 31, 2019		4,219,606
Ending balance at Mar. 31, 2019	$ (113,797)	$ 0	21,972	(135,002)	(767)
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)	3,346	3,346
Stock options exercised	$ 13		13
Stock-based compensation	132		132
Share conversion in connection with the 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	(12)				(12)
Net loss	$ (4,187)			(4,187)
Ending balance (in shares) at Mar. 31, 2020	35,135,520	35,135,520
Ending balance at Mar. 31, 2020	$ (21,169)	$ 4	$ 127,683	$ (148,102)	$ (754)
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