Condensed Consolidated Statements of Changes in Stockholders' Deficit (Unaudited) - USD ($) $ in Thousands	Total	Series A Redeemable Convertible Preferred Stock [Member]	Series B Redeemable Convertible Preferred Stock [Member]	Common Stock [Member]	Common Stock Subscribed [Member]	Common Stock Issuable [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Series A Redeemable Convertible Preferred Stock [Member]	Additional Paid-in Capital [Member] Series B Redeemable Convertible Preferred Stock [Member]	Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2019	$ (12,673)			$ 1	$ 12	$ 3,474	$ 38,611			$ (54,771)
Beginning balance, shares at Dec. 31, 2019				14,333,834	8,664
Reclassification of warrants from equity classified to liability classified	(7,648)						(7,648)
Common stock issued for accrued interest					$ (12)		12
Common stock issued for accrued interest, shares				8,664	(8,664)
Issuance of common stock for cash - related party	3,150						3,150
Issuance of common stock for cash - related party, shares				1,260,000
Redemption of common stock for series B redeemable preferred stock - related party	(3,150)						(3,150)
Redemption of common stock for series B redeemable preferred stock - related party, shares				(1,260,000)
Issuance of warrants as deemed dividend - related party	(455)						(455)
Stock-based compensation expense	368						368
Redeemable preferred stock dividend		$ (30)	$ (12)					$ (30)	$ (12)
Net income (loss)	(13,702)									(13,702)
Ending balance at Mar. 31, 2020	(34,152)			$ 1		3,474	30,846			(68,473)
Ending balance, shares at Mar. 31, 2020				14,342,498
Beginning balance at Dec. 31, 2020	(67,322)			$ 2		3,474	30,821			(101,619)
Beginning balance, shares at Dec. 31, 2020				15,212,815	80
Obligation to issue common stock - related party	916					916
Issuance of warrants to extinguish debt	1,224						1,224
Common stock issued for services - related party, shares					250
Stock-based compensation expense	232						232
Redeemable preferred stock dividend		$ (9)	$ (152)					$ (9)	$ (152)
Net income (loss)	31,223									31,223
Ending balance at Mar. 31, 2021	$ (33,888)			$ 2		$ 4,390	$ 32,116			$ (70,396)
Ending balance, shares at Mar. 31, 2021				15,212,815	330