CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Millions	Total	Common Class A	Common Stock	Common Stock Common Class A	Additional Paid-in Capital	Additional Paid-in Capital Common Class A	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated Deficit Common Class A
Beginning balance (in shares) at Dec. 31, 2021			66,722
Beginning balance at Dec. 31, 2021	$ 257.6		$ 0.0		$ 331.6		$ 0.5	$ (74.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options (in shares)			154
Issuance of Class A common stock upon exercise of stock options	0.7				0.7
Issuance of Class A common stock pursuant to settlement of restricted stock units (in shares)			262
Issuance of Class A common stock pursuant to settlement of restricted stock units	0.0
Stock-based compensation	7.9				7.9
Other comprehensive income (loss)	(0.3)						(0.3)
Net income (loss)	(10.5)							(10.5)
Ending balance (in shares) at Mar. 31, 2022			67,138
Ending balance at Mar. 31, 2022	255.4		$ 0.0		340.2		0.2	(85.0)
Beginning balance (in shares) at Dec. 31, 2021			66,722
Beginning balance at Dec. 31, 2021	257.6		$ 0.0		331.6		0.5	(74.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(19.1)
Ending balance (in shares) at Sep. 30, 2022			74,322
Ending balance at Sep. 30, 2022	318.6		$ 0.0		414.1		(1.9)	(93.6)
Beginning balance (in shares) at Mar. 31, 2022			67,138
Beginning balance at Mar. 31, 2022	255.4		$ 0.0		340.2		0.2	(85.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options (in shares)			629
Issuance of Class A common stock upon exercise of stock options	3.6				3.6
Issuance of Class A common stock pursuant to settlement of restricted stock units (in shares)			400
Issuance of Class A common stock pursuant to settlement of restricted stock units	0.0
Issuance of Class A common stock under Employee Stock Purchase Plan (in shares)				470
Issuance of Class A common stock under Employee Stock Purchase Plan		$ 3.2				$ 3.2
Stock-based compensation	11.6				11.6
Other comprehensive income (loss)	(1.0)						(1.0)
Net income (loss)	(9.3)							(9.3)
Ending balance (in shares) at Jun. 30, 2022			68,637
Ending balance at Jun. 30, 2022	263.5		$ 0.0		358.6		(0.8)	(94.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options (in shares)			343
Issuance of Class A common stock upon exercise of stock options	1.9				1.9
Issuance of Class A common stock pursuant to settlement of restricted stock units (in shares)			424
Issuance of Class A common stock pursuant to settlement of restricted stock units	0.0
Class A common stock withheld related to net share settlement of restricted stock units (in shares)				(17)
Class A common stock withheld related to net share settlement of restricted stock units		(0.1)				(0.1)
Issuance of Class A common stock for business combination (in shares)			4,935
Issuance of Class A common stock for business combination	43.2				43.2
Stock-based compensation	10.5				10.5
Other comprehensive income (loss)	(1.1)						(1.1)
Net income (loss)	0.7							0.7
Ending balance (in shares) at Sep. 30, 2022			74,322
Ending balance at Sep. 30, 2022	$ 318.6		$ 0.0		414.1		(1.9)	(93.6)
Beginning balance (in shares) at Dec. 31, 2022	75,120		75,120
Beginning balance at Dec. 31, 2022	$ 341.7		$ 0.0		427.3		(0.9)	(84.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options (in shares)			1,226
Issuance of Class A common stock upon exercise of stock options	8.4				8.4
Issuance of Class A common stock pursuant to settlement of restricted stock units (in shares)			380
Issuance of Class A common stock pursuant to settlement of restricted stock units	0.0
Class A common stock withheld related to net share settlement of restricted stock units (in shares)				(15)
Class A common stock withheld related to net share settlement of restricted stock units		$ (0.3)				(0.3)
Stock-based compensation	10.1				10.1
Other comprehensive income (loss)	0.2						0.2
Net income (loss)	1.7							1.7
Ending balance (in shares) at Mar. 31, 2023			76,711
Ending balance at Mar. 31, 2023	$ 361.8		$ 0.0		445.5		(0.7)	(83.0)
Beginning balance (in shares) at Dec. 31, 2022	75,120		75,120
Beginning balance at Dec. 31, 2022	$ 341.7		$ 0.0		427.3		(0.9)	(84.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of Class A common stock (in shares)		(1,300)
Repurchase of Class A common stock		$ (12.1)
Net income (loss)	$ (9.5)
Ending balance (in shares) at Sep. 30, 2023	76,994		76,994
Ending balance at Sep. 30, 2023	$ 364.2		$ 0.0		471.2		(0.7)	(106.3)
Beginning balance (in shares) at Mar. 31, 2023			76,711
Beginning balance at Mar. 31, 2023	361.8		$ 0.0		445.5		(0.7)	(83.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options (in shares)			66
Issuance of Class A common stock upon exercise of stock options	0.4				0.4
Issuance of Class A common stock pursuant to settlement of restricted stock units (in shares)			674
Issuance of Class A common stock pursuant to settlement of restricted stock units	0.0
Class A common stock withheld related to net share settlement of restricted stock units (in shares)				(25)
Class A common stock withheld related to net share settlement of restricted stock units		(0.2)				(0.2)
Issuance of Class A common stock under Employee Stock Purchase Plan (in shares)				240
Issuance of Class A common stock under Employee Stock Purchase Plan		1.9				1.9
Repurchase of Class A common stock (in shares)				(141)
Repurchase of Class A common stock		(1.3)							$ (1.3)
Stock-based compensation	12.9				12.9
Other comprehensive income (loss)	0.2						0.2
Net income (loss)	(10.7)							(10.7)
Ending balance (in shares) at Jun. 30, 2023			77,525
Ending balance at Jun. 30, 2023	365.0		$ 0.0		460.5		(0.5)	(95.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options (in shares)			51
Issuance of Class A common stock upon exercise of stock options	0.3				0.3
Issuance of Class A common stock pursuant to settlement of restricted stock units (in shares)			657
Issuance of Class A common stock pursuant to settlement of restricted stock units	0.0
Class A common stock withheld related to net share settlement of restricted stock units (in shares)				(30)
Class A common stock withheld related to net share settlement of restricted stock units		$ (0.2)				$ (0.2)
Repurchase of Class A common stock (in shares)		(1,200)		(1,209)
Repurchase of Class A common stock		$ (10.8)							$ (10.8)
Stock-based compensation	10.6				10.6
Other comprehensive income (loss)	(0.2)						(0.2)
Net income (loss)	$ (0.5)							(0.5)
Ending balance (in shares) at Sep. 30, 2023	76,994		76,994
Ending balance at Sep. 30, 2023	$ 364.2		$ 0.0		$ 471.2		$ (0.7)	$ (106.3)