Organization and Nature of Business; Basis of Presentation; Principles of Consolidation; Significant Accounting Policies - Schedule of Effect of Restatement (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Current portion of convertible notes	$ 56,204		$ 56,204			$ 0
Total current liabilities	66,929		66,929			6,945
Convertible notes	49,624		49,624			107,984
Accumulated deficit	(576,734)		(576,734)		$ (558,211)	$ (570,668)
Gain on extinguishment of debt	199	$ 0	3,565	$ 0
Total other income (expense), net	(534)	(4,084)	1,896	(8,297)
Net loss before income taxes	(18,523)	(21,674)	(31,988)	(45,913)
Net loss	$ 18,523	$ 21,674	$ 31,988	$ 45,913
Basic net loss per share (in usd per share)	$ (0.24)	$ (0.36)	$ (0.44)	$ (0.77)
Diluted net loss per share (in usd per share)	$ (0.24)	$ (0.36)	$ (0.44)	$ (0.77)
Comprehensive loss	$ (18,723)	$ (21,652)	$ (32,360)	$ (45,991)
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Current portion of convertible notes	0		0
Total current liabilities	10,725		10,725
Convertible notes	105,828		105,828
Gain on extinguishment of debt	919
Total other income (expense), net	186
Net loss before income taxes	(17,803)
Net loss	$ 17,803
Basic net loss per share (in usd per share)	$ (0.23)
Diluted net loss per share (in usd per share)	$ (0.23)
Comprehensive loss	$ (18,003)
Adjustment(s)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Current portion of convertible notes	56,204		56,204
Total current liabilities	56,204		56,204
Convertible notes	(56,204)		$ (56,204)
Gain on extinguishment of debt	(720)
Total other income (expense), net	(720)
Net loss before income taxes	(720)
Net loss	$ 720
Basic net loss per share (in usd per share)	$ (0.01)
Diluted net loss per share (in usd per share)	$ (0.01)
Comprehensive loss	$ (720)