Income Taxes - Schedule of Provision (Benefit) Expense for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pre-tax (loss) / income
Domestic											$ (56,342)	$ (64,071)	$ (17,030)
Foreign											(979)	(1,642)	4,050
Loss before income taxes	$ (11,259)	$ (12,979)	$ (10,883)	$ (8,346)	$ (8,709)	$ (9,809)	$ (23,862)	$ (18,518)	$ (35,121)	$ (26,864)	(57,321)	(65,713)	(12,980)
Current tax expense / (benefit):
Federal											105		(165)
State											58	96	(36)
Foreign											730	315	744
Total current tax expense											893	411	543
Deferred tax expense / (benefit):
Federal											(11,309)	(15,900)	(3,506)
State											(1,402)	(1,939)	(464)
Foreign											(1,099)	(909)	170
Change in valuation allowance											13,129	18,273	3,970
Total deferred tax (benefit) expense											(681)	(475)	170
Total tax expense (benefit):
Federal											(11,204)	(15,900)	(3,671)
State											(1,344)	(1,843)	(500)
Foreign											(368)	(594)	914
Change in valuation allowance											13,129	18,273	3,970
Total income tax expense (benefit)	$ (108)	$ 269	$ (71)	$ 201	$ 73	$ 32	$ 198	$ 105	$ 90	$ 306	$ 213	$ (64)	$ 713