Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 245,406	$ 147,449
Available for sale securities	49,943	245
Inventory	104,603	116,349
Accounts receivable, net	39,115	38,864
Prepaid expenses and other current assets	10,035	6,626
Total current assets	449,102	309,533
Property and equipment, net	9,380	10,380
Operating lease assets	26,884	29,038
Goodwill	55,053	55,053
Other intangible assets, net	157,484	291,212
Other assets	47,271	75,985
Total assets	745,174	771,201
Current liabilities:
Accounts payable	29,413	39,217
Accrued expenses and other current liabilities	142,832	129,071
Short-term deferred revenue	23,529	39,830
Total current liabilities	195,774	208,118
Deferred revenue, net of current portion	34,542	33,120
Operating lease liabilities, net of current portion	24,862	27,528
Derivative liability	1,890	1,650
Long-term debt, net	76,338	75,805
Other non-current liabilities	41,508	30,223
Total liabilities	374,914	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 June 30, 2020 and December 31, 2019	0	0
Common stock $0.00001 par value; 350,000,000 and 175,000,000 shares authorized at June 30,    2020 and December 31, 2019, respectively; 143,129,409 and 121,674,568 shares issued and    outstanding at June 30, 2020 and December 31, 2019, respectively	1	1
Additional paid-in capital	1,400,820	1,188,810
Accumulated other comprehensive loss	(9)	0
Accumulated deficit	(1,030,552)	(794,054)
Total stockholders' equity	370,260	394,757
Total liabilities and stockholders' equity	$ 745,174	$ 771,201