Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit​
Beginning balance (in shares) at Dec. 31, 2021		173,674,067
Beginning balance at Dec. 31, 2021	$ 3,387,636	$ 1,738	$ 6,028,861	$ (1,443)	$ (2,641,520)
Increase (Decrease) in Stockholders' Equity
Exercise of common stock options (in shares)		485,537
Exercise of common stock options	4,282	$ 5	4,277
Compensation expense related to issuance of stock options and restricted stock awards (in shares)		1,391,797
Compensation expense related to issuance of stock options and restricted stock awards	52,441	$ 14	52,427
Other	(7)		(7)
Other (in shares)		7
Net income (loss)	(180,937)				(180,937)
Other comprehensive income (loss)	(5,204)			(5,204)
Ending balance (in shares) at Mar. 31, 2022		175,551,408
Ending balance at Mar. 31, 2022	3,258,211	$ 1,757	6,085,558	(6,647)	(2,822,457)
Beginning balance (in shares) at Dec. 31, 2021		173,674,067
Beginning balance at Dec. 31, 2021	3,387,636	$ 1,738	6,028,861	(1,443)	(2,641,520)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(495,761)
Ending balance (in shares) at Sep. 30, 2022		177,253,533
Ending balance at Sep. 30, 2022	3,108,634	$ 1,774	6,255,211	(11,070)	(3,137,281)
Beginning balance (in shares) at Mar. 31, 2022		175,551,408
Beginning balance at Mar. 31, 2022	3,258,211	$ 1,757	6,085,558	(6,647)	(2,822,457)
Increase (Decrease) in Stockholders' Equity
Exercise of common stock options (in shares)		84,485
Exercise of common stock options	743	$ 1	742
Issuance of common stock to fund the Company's 401(k) match (in shares)		391,129
Compensation expense related to issuance of stock options and restricted stock awards (in shares)		183,095
Compensation expense related to issuance of stock options and restricted stock awards	58,932	$ 2	58,930
Other	14,790	$ 2	14,788
Issuance of common stock for business combinations, net of issuance costs (in shares)		265,186
Stock Issued During Period, Value, Employee Stock Purchase Plan	15,529	$ 3	15,526
Purchase of employee stock purchase plan shares (in shares)		326,131
Issuance of common stock to fund the Company's 401(k) match	29,202	$ 4	29,198
Net income (loss)	(166,063)				(166,063)
Other comprehensive income (loss)	(1,998)			(1,998)
Ending balance (in shares) at Jun. 30, 2022		176,801,434
Ending balance at Jun. 30, 2022	3,209,346	$ 1,769	6,204,742	(8,645)	(2,988,520)
Increase (Decrease) in Stockholders' Equity
Exercise of common stock options (in shares)		73,441
Exercise of common stock options	941	$ 1	940
Compensation expense related to issuance of stock options and restricted stock awards (in shares)		378,658
Compensation expense related to issuance of stock options and restricted stock awards	49,533	$ 4	49,529
Net income (loss)	(148,761)				(148,761)
Other comprehensive income (loss)	(2,425)			(2,425)
Ending balance (in shares) at Sep. 30, 2022		177,253,533
Ending balance at Sep. 30, 2022	$ 3,108,634	$ 1,774	6,255,211	(11,070)	(3,137,281)
Beginning balance (in shares) at Dec. 31, 2022	177,925,631	177,925,631
Beginning balance at Dec. 31, 2022	$ 3,043,162	$ 1,780	6,311,644	(5,236)	(3,265,026)
Increase (Decrease) in Stockholders' Equity
Exercise of common stock options (in shares)		88,228
Exercise of common stock options	964	$ 1	963
Issuance of common stock to fund the Company's 401(k) match (in shares)		517,215
Compensation expense related to issuance of stock options and restricted stock awards (in shares)		1,299,071
Compensation expense related to issuance of stock options and restricted stock awards	49,139	$ 13	49,126
Issuance of common stock to fund the Company's 401(k) match	35,077	$ 5	35,072
Net income (loss)	(74,151)				(74,151)
Other comprehensive income (loss)	3,517			3,517
Ending balance (in shares) at Mar. 31, 2023		179,830,145
Ending balance at Mar. 31, 2023	$ 3,057,708	$ 1,799	6,396,805	(1,719)	(3,339,177)
Beginning balance (in shares) at Dec. 31, 2022	177,925,631	177,925,631
Beginning balance at Dec. 31, 2022	$ 3,043,162	$ 1,780	6,311,644	(5,236)	(3,265,026)
Increase (Decrease) in Stockholders' Equity
Net income (loss)	$ (154,383)
Ending balance (in shares) at Sep. 30, 2023	180,814,407	180,814,407
Ending balance at Sep. 30, 2023	$ 3,121,227	$ 1,809	6,540,362	(1,535)	(3,419,409)
Beginning balance (in shares) at Mar. 31, 2023		179,830,145
Beginning balance at Mar. 31, 2023	3,057,708	$ 1,799	6,396,805	(1,719)	(3,339,177)
Increase (Decrease) in Stockholders' Equity
Exercise of common stock options (in shares)		36,728
Exercise of common stock options	852	$ 1	851
Issuance of common stock to fund the Company's 401(k) match (in shares)		335
Compensation expense related to issuance of stock options and restricted stock awards (in shares)		134,002
Compensation expense related to issuance of stock options and restricted stock awards	61,725	$ 1	61,724
Stock Issued During Period, Value, Employee Stock Purchase Plan	16,344	$ 5	16,339
Purchase of employee stock purchase plan shares (in shares)		544,453
Issuance of common stock to fund the Company's 401(k) match	23		23
Net income (loss)	(81,026)				(81,026)
Other comprehensive income (loss)	996			996
Ending balance (in shares) at Jun. 30, 2023		180,545,663
Ending balance at Jun. 30, 2023	3,056,622	$ 1,806	6,475,742	(723)	(3,420,203)
Increase (Decrease) in Stockholders' Equity
Exercise of common stock options (in shares)		51,262
Exercise of common stock options	1,077	$ 1	1,076
Compensation expense related to issuance of stock options and restricted stock awards (in shares)		217,482
Compensation expense related to issuance of stock options and restricted stock awards	61,871	$ 2	61,869
Replaced restricted stock awards for business combinations	1,675		1,675
Net income (loss)	794				794
Other comprehensive income (loss)	$ (812)			(812)
Ending balance (in shares) at Sep. 30, 2023	180,814,407	180,814,407
Ending balance at Sep. 30, 2023	$ 3,121,227	$ 1,809	$ 6,540,362	$ (1,535)	$ (3,419,409)