CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Shares	Additional paid in capital	Accumulated Other Comprehensive (Loss) Income	Accumulated Deficit
Balance (in shares) at Dec. 31, 2022		142,268
Balance at Dec. 31, 2022	$ 405,435	$ 1,185,309	$ 85,489	$ (1,061)	$ (864,302)
Increase (Decrease) in Stockholders' Equity
Shares issued on exercise of stock options and vesting of performance awards and restricted stock units (in shares)		891
Shares issued on exercise of stock options and vesting of performance awards and restricted stock units	1,873	$ 9,061	(7,188)
Issuance of common shares in conjunction with ESPP program (in shares)		210
Issuance of common shares in conjunction with ESPP program	906	$ 2,110	(1,204)
Share-based compensation	21,735		21,735
Unrealized loss on available-for-sale securities, net	41			41
Net income (loss)	(37,698)				(37,698)
Balance (in shares) at Jun. 30, 2023		143,369
Balance at Jun. 30, 2023	392,292	$ 1,196,480	98,832	(1,020)	(902,000)
Balance (in shares) at Mar. 31, 2023		143,029
Balance at Mar. 31, 2023	390,408	$ 1,193,019	88,885	(988)	(890,508)
Increase (Decrease) in Stockholders' Equity
Shares issued on exercise of stock options and vesting of performance awards and restricted stock units (in shares)		130
Shares issued on exercise of stock options and vesting of performance awards and restricted stock units	234	$ 1,351	(1,117)
Issuance of common shares in conjunction with ESPP program (in shares)		210
Issuance of common shares in conjunction with ESPP program	906	$ 2,110	(1,204)
Share-based compensation	12,268		12,268
Unrealized loss on available-for-sale securities, net	(32)			(32)
Net income (loss)	(11,492)				(11,492)
Balance (in shares) at Jun. 30, 2023		143,369
Balance at Jun. 30, 2023	$ 392,292	$ 1,196,480	98,832	(1,020)	(902,000)
Balance (in shares) at Dec. 31, 2023	143,833	143,833
Balance at Dec. 31, 2023	$ 377,954	$ 1,200,218	120,788	(730)	(942,322)
Increase (Decrease) in Stockholders' Equity
Shares issued on exercise of stock options and vesting of performance awards and restricted stock units (in shares)	85	2,423
Shares issued on exercise of stock options and vesting of performance awards and restricted stock units	$ 411	$ 22,907	(22,496)
Shares repurchased and cancelled, inclusive of transaction costs (in shares)		(3,424)
Shares repurchased and cancelled, inclusive of transaction costs	(18,619)	$ (18,619)
Issuance of common shares in conjunction with ESPP program (in shares)		152
Issuance of common shares in conjunction with ESPP program	703	$ 1,048	(345)
Share-based compensation	14,323		14,323
Unrealized loss on available-for-sale securities, net	(129)			(129)
Net income (loss)	$ (10,027)				(10,027)
Balance (in shares) at Jun. 30, 2024	142,984	142,984
Balance at Jun. 30, 2024	$ 364,616	$ 1,205,554	112,270	(859)	(952,349)
Balance (in shares) at Mar. 31, 2024		143,690
Balance at Mar. 31, 2024	359,476	$ 1,207,982	105,419	(854)	(953,071)
Increase (Decrease) in Stockholders' Equity
Shares issued on exercise of stock options and vesting of performance awards and restricted stock units (in shares)		192
Shares issued on exercise of stock options and vesting of performance awards and restricted stock units	383	$ 1,773	(1,390)
Shares repurchased and cancelled, inclusive of transaction costs (in shares)		(1,050)
Shares repurchased and cancelled, inclusive of transaction costs	(5,249)	$ (5,249)
Issuance of common shares in conjunction with ESPP program (in shares)		152
Issuance of common shares in conjunction with ESPP program	703	$ 1,048	(345)
Share-based compensation	8,586		8,586
Unrealized loss on available-for-sale securities, net	(5)			(5)
Net income (loss)	$ 722				722
Balance (in shares) at Jun. 30, 2024	142,984	142,984
Balance at Jun. 30, 2024	$ 364,616	$ 1,205,554	$ 112,270	$ (859)	$ (952,349)