Members’/ Stockholders’ equity - Narrative (Details) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	Aug. 09, 2021 shares	Jul. 28, 2021 shares	Jul. 02, 2021 shares	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) shares	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) shares	Dec. 31, 2020 $ / shares shares
Class of Stock [Line Items]
Common stock, shares authorized (in shares)				500,000,000		500,000,000		500,000,000
Common stock, par value (in usd per share) | $ / shares				$ 0.001		$ 0.001		$ 0.001
Preferred stock, shares authorized (in shares)				50,000,000		50,000,000		50,000,000
Preferred stock, par value (in usd per share) | $ / shares				$ 0.001		$ 0.001		$ 0.001
Stock repurchased during period, value | $					$ 71	$ 1,204	$ 167
Restricted stock units
Class of Stock [Line Items]
Stock issued during period for vested RSUs (in shares)				(26,931)		(26,931)
Common Stock
Class of Stock [Line Items]
Stock issued during the period (in shares)				16,821,330		16,821,330
Issuance of common stock for Publica acquisition (in shares)	2,888,889			2,888,889		2,888,889
Stock issued during period for vested RSUs (in shares)				(26,931)		(26,931)
Stock issued during period, conversion of units (in shares)			134,203,403			134,203,403
Ratio of conversion of member units to common stock			242
Stock repurchased during period, shares (in shares)				0	14,762	99,946	35,090
Stock repurchased during period, value | $				$ 0	$ 71	$ 1,204	$ 167
Stock repurchased during period, value, in excess of par value | $					$ 10	$ 791	$ 22
Common Stock | IPO
Class of Stock [Line Items]
Stock issued during the period (in shares)			15,000,000
Common Stock | Over-Allotment Option
Class of Stock [Line Items]
Stock issued during the period (in shares)		1,821,330