Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Sep. 20, 2020	Dec. 31, 2021	Dec. 31, 2020	May 14, 2020	Feb. 06, 2020
Preferred Stock [Abstract]
Preferred stock, shares authorized (in shares)		5,000,000	5,000,000
Preferred stock, shares issued (in shares)		0	0
Preferred stock, par value (in dollars per share)		$ 0.001	$ 0.001
Aggregate total purchase price		$ 0	$ 0
Anti-dilutive equity securities (in shares)		290,332,000	232,861,000
Preferred Stock Conversion [Member]
Preferred Stock [Abstract]
Anti-dilutive equity securities (in shares)		17,500,000
Series C Preferred Stock [Member]
Preferred Stock [Abstract]
Preferred stock, shares authorized (in shares)		90	90		90
Shares conversion price (in dollars per share)					$ 0.14
Series C Preferred Stock [Member] | Private Placement [Member]
Preferred Stock [Abstract]
Preferred stock, shares issued (in shares)		90
Preferred stock, par value (in dollars per share)					0.001
Preferred stock, stated value (in dollars per share)					$ 25,000
Aggregate total purchase price					$ 2,300
Series D Preferred Stock [Member]
Preferred Stock [Abstract]
Preferred stock, shares authorized (in shares)		8	8	8
Shares conversion price (in dollars per share)				$ 0.14
Series D Preferred Stock [Member] | Private Placement [Member]
Preferred Stock [Abstract]
Preferred stock, shares issued (in shares)		8
Preferred stock, par value (in dollars per share)				0.001
Preferred stock, stated value (in dollars per share)				$ 25,000
Aggregate total purchase price				$ 200
Series C and D Preferred Stock [Member]
Preferred Stock [Abstract]
Convertible preferred stock converted to common stock (in shares)	17,499,958