Warrant and Derivative Liabilities - Derivative Activity (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Beginning balance	$ 6,163
Issuance date fair value	218
Change in fair value	(2,780)
Ending balance	3,601
Senior Convertible Note
Derivative Instruments, Gain (Loss) [Line Items]
Beginning balance	1,053
Issuance date fair value	0
Change in fair value	487
Ending balance	1,540
Junior Convertible Note
Derivative Instruments, Gain (Loss) [Line Items]
Beginning balance	0
Issuance date fair value	218
Change in fair value	(18)
Ending balance	200
Redeemable Preferred Stock
Derivative Instruments, Gain (Loss) [Line Items]
Beginning balance	5,110
Issuance date fair value	0
Change in fair value	(3,249)
Ending balance	$ 1,861