Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 87,344	$ 192,248
Marketable securities	171,222	163,770
Accounts receivable, net	84,564	102,922
Inventories, net	26,024	25,659
Prepaid expenses and other current assets	21,757	8,888
Total current assets	390,911	493,487
Long term marketable securities	593,754	418,798
Property and equipment, net	4,028	4,095
Intangible assets, net	28,787	31,368
Lease assets	19,639
Deferred income taxes	25,975	29,683
Other assets	581	380
Total assets	1,063,675	977,811
Current liabilities
Accounts payable	4,081	3,195
Accrued product returns and rebates	95,934	107,063
Accrued expenses and other current liabilities	38,614	36,535
Income taxes payable	2,674	12,377
Non-recourse liability related to sale of future royalties, current portion	2,668	2,183
Total current liabilities	143,971	161,353
Convertible notes, net	337,210	329,462
Non-recourse liability related to sale of future royalties, long term	21,100	22,575
Lease liabilities, long term	27,535
Other liabilities	10,955	11,398
Total liabilities	540,771	524,788
Stockholders’ equity
Common stock, $0.001 par value, 130,000,000 shares authorized 52,449,036 and 52,316,583 shares issued and outstanding as of June 30, 2019 and December 31, 2018, respectively	52	52
Additional paid-in capital	379,369	369,637
Accumulated other comprehensive earnings (loss), net of tax	5,924	(3,158)
Retained earnings	137,559	86,492
Total stockholders’ equity	522,904	453,023
Total liabilities and stockholders’ equity	$ 1,063,675	$ 977,811