Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 62,741,000	$ 104,644,000
Available for sale securities	105,297,000	216,996,000
Inventory	115,206,000	114,245,000
Accounts receivable, net	48,435,000	16,666,000
Prepaid expenses and other current assets	15,554,000	15,724,000
Total current assets	347,233,000	468,275,000
Property and equipment, net	9,512,000	8,023,000
Operating lease assets	32,399,000
Goodwill	55,053,000	55,053,000
Other intangible assets, net	318,513,000	328,153,000
Other assets	128,083,000	137,036,000
Total assets	890,793,000	996,540,000
Current liabilities:
Accounts payable	15,226,000	42,796,000
Accrued expenses and other current liabilities	137,803,000	150,917,000
Debt		15,000,000
Short-term deferred revenue	49,584,000	56,980,000
Total current liabilities	202,613,000	265,693,000
Deferred rent, net of current portion		3,006,000
Deferred revenue, net of current portion	56,887,000	55,709,000
Operating lease liabilities, net of current portion	31,304,000
Deferred tax liabilities	3,874,000	6,631,000
Other non-current liabilities	29,736,000	29,573,000
Total liabilities	324,414,000	360,612,000
Commitments and contingencies (Note 15)
Stockholders' equity:
Preferred stock $0.00001 par value, 25,000,000 shares authorized; 0 shares issued and outstanding at March 31, 2019 and December 31, 2018
Common stock $0.00001 par value; 175,000,000 shares authorized at March 31, 2019 and December 31, 2018; 117,122,262 and 116,887,518 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively	1,000	1,000
Additional paid-in capital	1,153,230,000	1,150,583,000
Accumulated other comprehensive loss	(36,000)	(261,000)
Accumulated deficit	(586,816,000)	(514,395,000)
Total stockholders' equity	566,379,000	635,928,000
Total liabilities and stockholders' equity	$ 890,793,000	$ 996,540,000