Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 169,286	$ 147,449
Available for sale securities	99,969	245
Inventory	88,242	116,349
Accounts receivable, net	24,466	38,864
Prepaid expenses and other current assets	9,037	6,626
Total current assets	391,000	309,533
Property and equipment, net	8,821	10,380
Operating lease assets	25,721	29,038
Goodwill	55,053	55,053
Other intangible assets, net	151,378	291,212
Other assets	44,170	75,985
Total assets	676,143	771,201
Current liabilities:
Accounts payable	40,403	39,217
Accrued expenses and other current liabilities	123,021	129,071
Short-term deferred revenue	18,034	39,830
Total current liabilities	181,458	208,118
Deferred revenue, net of current portion	33,660	33,120
Operating lease liabilities, net of current portion	23,494	27,528
Derivative liability	1,990	1,650
Long-term debt, net	76,608	75,805
Other non-current liabilities	40,971	30,223
Total liabilities	358,181	376,444
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, 2020 and December 31, 2019	0	0
Common stock $0.00001 par value; 350,000,000 and 175,000,000 shares authorized at September 30, 2020 and December 31, 2019, respectively; 143,328,652 and 121,674,568 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively	1	1
Additional paid-in capital	1,408,466	1,188,810
Accumulated other comprehensive loss	6	0
Accumulated deficit	(1,090,511)	(794,054)
Total stockholders' equity	317,962	394,757
Total liabilities and stockholders' equity	$ 676,143	$ 771,201