Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 181,381	$ 192,248
Marketable securities	165,692	163,770
Accounts receivable, net	87,332	102,922
Inventories, net	26,628	25,659
Prepaid expenses and other current assets	11,611	8,888
Total current assets	472,644	493,487
Long term marketable securities	591,773	418,798
Property and equipment, net	17,068	4,095
Intangible assets, net	24,840	31,368
Lease assets	21,279
Deferred income taxes	32,063	29,683
Other assets	615	380
Total assets	1,160,282	977,811
Current liabilities
Accounts payable	10,141	3,195
Accrued product returns and rebates	107,629	107,063
Accrued expenses and other current liabilities	37,130	36,535
Income taxes payable	2,443	12,377
Nonrecourse liability related to sale of future royalties; current portion	3,244	2,183
Total current liabilities	160,587	161,353
Convertible notes, net	345,170	329,462
Nonrecourse liability related to sale of future royalties; long term	19,248	22,575
Lease liabilities, long term	30,440
Other liabilities	9,409	11,398
Total liabilities	564,854	524,788
Stockholders’ equity
Common stock, $0.001 par value; 130,000,000 shares authorized; 52,533,348 and 52,316,583 shares issued and outstanding as of December 31, 2019 and December 31, 2018, respectively	53	52
Additional paid-in capital	388,410	369,637
Accumulated other comprehensive earnings (loss), net of tax	7,417	(3,158)
Retained earnings	199,548	86,492
Total stockholders’ equity	595,428	453,023
Total liabilities and stockholders’ equity	$ 1,160,282	$ 977,811