Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 192,248	$ 100,304
Marketable securities	163,770	39,736
Accounts receivable, net	102,922	65,586
Inventories, net	25,659	16,304
Prepaid expenses and other current assets	8,888	6,521
Total current assets	493,487	228,451
Long term marketable securities	418,798	133,638
Property and equipment, net	4,095	5,124
Intangible assets, net	31,368	36,019
Deferred income taxes	29,683	20,843
Other assets	380	389
Total assets	977,811	424,464
Current liabilities
Accounts payable	3,195	6,844
Accrued sales deductions	107,063	68,343
Accrued expenses	36,535	27,305
Income taxes payable	12,377	15,938
Non-recourse liability related to sale of future royalties, current portion	2,183	4,283
Deferred licensing revenue		287
Total current liabilities	161,353	123,000
Deferred licensing revenue, net of current portion		1,149
Convertible notes, net	329,462
Non-recourse liability related to sale of future royalties, long term	22,575	22,258
Other non-current liabilities	11,398	10,577
Total liabilities	524,788	156,984
Stockholders' equity
Common stock, $0.001 par value, 130,000,000 shares authorized at December 31, 2018 and December 31, 2017; 52,316,583 and 51,314,850 shares issued and outstanding at December 31, 2018 and December 31, 2017, respectively	52	51
Additional paid-in capital	369,637	294,999
Accumulated other comprehensive loss, net of tax	(3,158)	(747)
Retained earnings (accumulated deficit)	86,492	(26,823)
Total stockholders' equity	453,023	267,480
Total liabilities and stockholders' equity	$ 977,811	$ 424,464