CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 513,454	$ 193,822
Restricted cash	8,975
Accounts receivable, less reserve for doubtful accounts of $420 and $227 at September 30, 2019 and December 31, 2018, respectively	41,968	33,015
Royalties and other receivables	68	136
Unbilled receivables	555	2,602
Inventories, net	51,579	42,263
Prepaid expenses and other current assets	4,941	3,901
Total current assets	621,540	275,739
Property, plant and equipment, net	43,034	32,180
Intangible assets, net	216,289	135,438
Goodwill	468,845	326,735
Deferred tax assets	3,917	4,355
Operating lease right of use assets	24,845
Other assets	238	174
Total assets	1,378,708	774,621
Current liabilities:
Accounts payable	9,951	10,489
Operating lease liability	3,044
Accrued liabilities	25,770	15,865
Convertible senior notes, current portion		103,488
Total current liabilities	38,765	129,842
Convertible senior notes	230,182
Deferred tax liabilities	38,059	25,086
Operating lease liability, long-term	26,056
Other liabilities, long-term	528	4,125
Total liabilities	333,590	159,053
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock, $0.01 par value, 5,000,000 shares authorized, no shares issued or outstanding
Common stock, $0.01 par value; 80,000,000 shares authorized; 52,052,581 shares at September 30, 2019 and 43,917,378 shares at December 31, 2018 issued and outstanding	521	439
Additional paid-in capital	1,064,152	642,590
Accumulated other comprehensive loss	(21,794)	(11,893)
Accumulated earnings (deficit)	2,239	(15,568)
Total stockholders' equity	1,045,118	615,568
Total liabilities and stockholders' equity	$ 1,378,708	$ 774,621