Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 116,889	$ 192,248
Marketable securities	179,808	163,770
Accounts receivable, net	86,699	102,922
Inventories, net	25,504	25,659
Prepaid expenses and other current assets	18,182	8,888
Total current assets	427,082	493,487
Long term marketable securities	596,442	418,798
Property and equipment, net	9,977	4,095
Intangible assets, net	26,101	31,368
Lease assets	18,780
Deferred income taxes	27,953	29,683
Other assets	574	380
Total assets	1,106,909	977,811
Current liabilities
Accounts payable	3,090	3,195
Accrued product returns and rebates	98,050	107,063
Accrued expenses and other current liabilities	40,800	36,535
Income taxes payable	4,818	12,377
Nonrecourse liability related to sale of future royalties, current portion	2,959	2,183
Total current liabilities	149,717	161,353
Convertible notes, net	341,163	329,462
Nonrecourse liability related to sale of future royalties, long term	20,305	22,575
Lease liabilities, long term	27,256
Other liabilities	11,211	11,398
Total liabilities	549,652	524,788
Stockholders’ equity
Common stock, $0.001 par value; 130,000,000 shares authorized; 52,462,936 and 52,316,583 shares issued and outstanding as of September 30, 2019 and December 31, 2018, respectively	52	52
Additional paid-in capital	383,525	369,637
Accumulated other comprehensive earnings (loss), net of tax	7,261	(3,158)
Retained earnings	166,419	86,492
Total stockholders’ equity	557,257	453,023
Total liabilities and stockholders’ equity	$ 1,106,909	$ 977,811