Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Series X1 Preferred Stock [Member]
Beginning Balance at Dec. 31, 2019	$ 9,465	$ 1	$ 67,046	$ (57,582)
Beginning Balance, Shares at Dec. 31, 2019		720,408
Issuance of common stock in connection with exercise of warrants, net of issuance costs	$ 5,191		5,191
Issuance of common stock in connection with exercise of warrants, net of issuance costs, Shares		383,234
Issuance of common stock in connection with conversion of preferred stock, shares	(3,285)	182,500
Issuance of common stock in connection with vesting of restricted stock units, Shares		1,389
Cancellation of common stock in connection with exchange for preferred stock, Shares	3,796	(210,889)
Warrant inducement expense	$ 4,829		4,829
Stock-based compensation	634		634
Net loss and other comprehensive loss	(10,763)			(10,763)
Ending Balance at Jun. 30, 2020	$ 9,356	$ 1	77,700	(68,345)
Ending Balance, Shares at Jun. 30, 2020	511	1,076,642
Beginning Balance at Mar. 31, 2020	$ 11,745	$ 1	77,503	(65,759)
Beginning Balance, Shares at Mar. 31, 2020	3,796	892,753
Issuance of common stock in connection with conversion of preferred stock, shares	(3,285)	182,500
Issuance of common stock in connection with vesting of restricted stock units, Shares		1,389
Stock-based compensation	$ 197		197
Net loss and other comprehensive loss	(2,586)			(2,586)
Ending Balance at Jun. 30, 2020	$ 9,356	$ 1	77,700	(68,345)
Ending Balance, Shares at Jun. 30, 2020	511	1,076,642
Beginning Balance at Dec. 31, 2020	$ 190,596	$ 15	270,974	(80,393)
Temporary Equity, Beginning Balance, Shares at Dec. 31, 2020					108,070
Beginning Balance, Shares at Dec. 31, 2020		15,160,397
Cancellation of common stock in connection with exchange for preferred stock, Shares	6,204	(344,666)
Cancellation of common stock in connection with exchange for warrants		$ (1)	1
Cancellation of common stock in connection with exchange for warrants, Shares		(509,117)
Stock-based compensation	$ 3,808		3,808
Net loss and other comprehensive loss	(15,883)			(15,883)
Ending Balance at Jun. 30, 2021	$ 178,521	$ 14	274,783	(96,276)
Temporary Equity, Ending Balance, Shares at Jun. 30, 2021					108,070
Ending Balance, Shares at Jun. 30, 2021	6,204	14,306,614
Beginning Balance at Mar. 31, 2021	$ 183,871	$ 14	272,749	(88,892)
Temporary Equity, Beginning Balance, Shares at Mar. 31, 2021					108,070
Beginning Balance, Shares at Mar. 31, 2021	6,204	14,306,614
Stock-based compensation	$ 2,034		2,034
Net loss and other comprehensive loss	(7,384)			(7,384)
Ending Balance at Jun. 30, 2021	$ 178,521	$ 14	$ 274,783	$ (96,276)
Temporary Equity, Ending Balance, Shares at Jun. 30, 2021					108,070
Ending Balance, Shares at Jun. 30, 2021	6,204	14,306,614