Description of the Business - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment	Jun. 30, 2022 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 30, 2020 USD ($)
Description of the Business [Line Items]
Number of reportable segments | segment			1
Net loss	$ 27,836	$ 23,581	$ 64,097	$ 68,147
Cash (used in) provided by operating activities			(7,730)	(3,801)
Cash and cash equivalents	41,300		41,300
Unused borrowing capacity	200		200
Accumulated deficit	133,627	321,086	133,627	321,086	$ 158,366	$ 194,554	$ 332,053	$ 372,587
Accumulated deficit
Description of the Business [Line Items]
Accumulated deficit	(587,026)	$ (390,765)	(587,026)	$ (390,765)	$ (559,190)	(523,063)	$ (367,000)	$ (322,106)
Unsecured convertible notes due 2026
Description of the Business [Line Items]
Aggregate principal amount	150,000		150,000
Revolving Credit Facility
Description of the Business [Line Items]
Unused borrowing capacity	200		200			$ 1,000
Maximum borrowing capacity									$ 50,000
Debt instrument, covenants, liquidity threshold	$ 25,000		$ 25,000						$ 25,000
CM Partners, LLC
Description of the Business [Line Items]
Percentage of membership interests acquired	100.00%		100.00%