Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 207,204	$ 228,698
Available for sale securities	0	39,992
Inventory	33,688	61,017
Accounts receivable, net	49,690	26,853
Prepaid expenses and other current assets	39,502	14,877
Total current assets	330,084	371,437
Property and equipment, net	7,196	8,622
Operating lease assets	23,192	26,876
Goodwill	55,053	55,053
Other intangible assets, net	117,138	144,170
Other assets	69,604	37,981
Total assets	602,267	644,139
Current liabilities:
Accounts payable	28,809	41,308
Accrued expenses and other current liabilities	144,704	130,624
Short-term deferred revenue	15,692	15,214
Total current liabilities	189,205	187,146
Deferred revenue, net of current portion	27,965	25,345
Operating lease liabilities, net of current portion	20,257	24,621
Derivative liability	1,930	2,420
Long-term debt, net	97,230	96,378
Liability related to sale of future royalties, net	51,137	0
Other non-current liabilities	77,393	60,611
Total liabilities	465,117	396,521
Commitments and contingencies (Note 14)
Stockholders' equity:
Preferred stock $0.00001 par value, 25,000,000 shares authorized; 0 shares issued and    outstanding at September 30, 2021 and December 31, 2020	0	0
Common stock $0.00001 par value; 350,000,000 shares authorized at September 30, 2021 and December 31, 2020; 174,551,989 and 148,074,085 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively	2	1
Additional paid-in capital	1,526,815	1,425,115
Accumulated other comprehensive loss	6	13
Accumulated deficit	(1,389,673)	(1,177,511)
Total stockholders' equity	137,150	247,618
Total liabilities and stockholders' equity	$ 602,267	$ 644,139