Stockholders' Deficit - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	12 Months Ended
	Dec. 23, 2020	Feb. 12, 2020	Feb. 27, 2020	Dec. 31, 2020	Feb. 11, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 26, 2018
Class of Stock [Line Items]
Common stock, shares issued (in shares)		4,171,571		40,278,496	50,325,662	4,220,998
Common stock, shares outstanding (in shares)		4,171,571		40,278,496	50,325,662	4,220,998
Shares issued in connection with the Reverse Merger (in shares)		1,650,000
Total common and preferred stock authorized for issuance (in shares)						755,000,000
Common stock, shares authorized (in shares)				750,000,000		29,012,034
Common stock, par value (in usd per share)				$ 0.0001		$ 0.0001
Preferred stock, shares authorized (in shares)						23,946,403
Par Value Per Share (in usd per share)						$ 0.0001
Preferred stock, shares issued (in shares)				0
Preferred stock, shares outstanding (in shares)				0		23,933,949
Placement agent fees and closing expenses				$ 3,100
Common Stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)				40,278,496		4,220,998	4,219,606
Shares issued in connection with the Reverse Merger (in shares)				1,650,000
Shares redeemed (in shares)				52,773
Price per share (in dollars per share)		$ 4.00
Private Placement
Class of Stock [Line Items]
Placement agent fees and closing expenses			$ 1,800
Private Placement | Common Stock
Class of Stock [Line Items]
Number of shares sold in private placement offering (in shares)	5,000,000		5,380,000
Price per share (in dollars per share)	$ 3.00		$ 4.00
Aggregate gross proceeds from closing of offering	$ 15,000		$ 21,500
Placement agent fees and closing expenses	$ 1,400
Exercise price (in usd per share)	$ 3.30
Private Placement | Warrant
Class of Stock [Line Items]
Placement agent fees and closing expenses	$ 223
Number of common stock issuable from warrants	150,000
Series 1 Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock, shares issued (in shares)				0	51,680,254	12,433,953
Convertible preferred stock, shares outstanding (in shares)				0	51,680,254	12,433,953
Common stock, shares issued (in shares)		12,433,953
Common stock, shares outstanding (in shares)		12,433,953
Preferred stock, shares authorized (in shares)						12,438,704
Par Value Per Share (in usd per share)						$ 0.001
Preferred stock, shares outstanding (in shares)						12,433,953
Series 2 Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock, shares issued (in shares)				0	38,760,190	7,499,996
Convertible preferred stock, shares outstanding (in shares)				0	38,760,190	7,499,996
Common stock, shares issued (in shares)		7,499,996
Common stock, shares outstanding (in shares)		7,499,996
Preferred stock, shares authorized (in shares)						7,507,699
Par Value Per Share (in usd per share)						$ 0.001
Preferred stock, shares outstanding (in shares)						7,499,996
Series 3 Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock, shares issued (in shares)				0	31,850,304	4,000,000		4,000,000
Convertible preferred stock, shares outstanding (in shares)				0	31,850,304	4,000,000
Common stock, shares issued (in shares)		4,000,000
Common stock, shares outstanding (in shares)		4,000,000
Preferred stock, shares authorized (in shares)						4,000,000
Par Value Per Share (in usd per share)						$ 0.001
Preferred stock, shares outstanding (in shares)						4,000,000
Common Stock
Class of Stock [Line Items]
Common stock, shares issued (in shares)				40,278,496
Common stock, shares outstanding (in shares)				40,278,496
Shares redeemed (in shares)		52,733
Common stock, shares authorized (in shares)				750,000,000
Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)				5,000,000