Fair value of financial instruments - Recurring Basis Unobservable (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Valuation Technique and Input, Description [Abstract]
Contingent consideration liability (Note 4), net of current portion	$ 5,599		$ 7,850
Contingent consideration - Long term portion | Series D Redeemable Convertible Preferred Stock
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	7,850	$ 6,984
Reclassification of FY payment to accrued expenses	(1,295)	(1,183)
Change in fair value	(956)	826
Balance, end of period	5,599	6,627
Contingent consideration - Long term portion | Series D Redeemable Convertible Preferred Stock | Discounted Cash Flow Analysis under the Income Approach
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, end of period	5,599
Warrant liability | Series D Redeemable Convertible Preferred Stock
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period		490
Change in fair value		$ 2,728
Reclassification of warrant liability to stockholders' equity	$ (3,218)