Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 143,893	$ 149,800
Inventory	36,272	38,195
Accounts receivable, net	81,869	50,875
Prepaid expenses and other current assets	42,129	33,140
Total current assets	304,163	272,010
Property and equipment, net	6,035	6,754
Operating lease assets	31,494	33,852
Goodwill	55,053	55,053
Other intangible assets, net	90,106	108,127
Other assets	34,953	49,754
Total assets	521,804	525,550
Current liabilities:
Accounts payable	24,944	33,588
Accrued expenses and other current liabilities	91,284	104,456
Short-term deferred revenue	5,047	20,906
Current portion of refund liability to customer	14,247	0
Current portion of long-term debt	98,158	97,543
Total current liabilities	233,680	256,493
Deferred revenue, net of current portion	43,296	21,474
Operating lease liabilities, net of current portion	31,733	33,703
Derivative liability	1,110	1,820
Liability related to sale of future royalties, net	56,743	53,079
Refund liability to customer, net of current portion	26,053	0
Other non-current liabilities	66,889	82,525
Total liabilities	459,504	449,094
Commitments and contingencies (Note 13)
Stockholders' equity:
Preferred stock $0.00001 par value, 25,000,000 shares authorized; 0 shares issued and    outstanding at June 30, 2022 and December 31, 2021	0	0
Common stock $0.00001 par value; 350,000,000 shares authorized at June 30, 2022 and December 31, 2021; 183,704,654 and 177,000,963 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	2	1
Additional paid-in capital	1,555,788	1,536,800
Accumulated other comprehensive loss	6	6
Accumulated deficit	(1,493,496)	(1,460,351)
Total stockholders' equity	62,300	76,456
Total liabilities and stockholders' equity	$ 521,804	$ 525,550