CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 31,269	$ 41,625
Short-term marketable securities	244,693	165,135
Trade receivables, net of allowances	19,928	17,588
Inventory	5,424	4,732
Prepaid expenses and other current assets	6,044	7,740
Total current assets	307,358	236,820
Strategic inventory	11,981	11,510
Operating lease right-of-use asset	3,446
Property and equipment, net of accumulated depreciation	1,050	655
Long-term marketable securities	39,352	0
Other assets	3,448	50
Deferred tax assets, net	45,677	62,659
Total assets	412,312	311,694
Current liabilities:
Accounts payable	7,537	8,266
Accrued clinical expenses	6,477	3,521
Accrued and other liabilities	23,269	23,786
Short-term operating lease liability	1,558
Total current liabilities	38,841	35,573
Long-term operating lease liability	1,903
Long-term accrued income taxes	386	239
Total liabilities	41,130	35,812
Commitments and contingencies (Note 10)
Stockholders’ equity:
Preferred stock, par value $0.001 per share, 10,000 shares authorized and no shares outstanding at December 31, 2019 and December 31, 2018	0	0
Common stock, par value $0.001 per share, 280,000 shares authorized and 119,767 issued and 114,549 outstanding at December 31, 2019 and 116,838 shares issued and 115,031 outstanding at December 31, 2018	120	117
Treasury stock; at cost; 5,218 shares of common stock at December 31, 2019 and 1,807 shares of common stock at December 31, 2018	(62,704)	(23,657)
Additional paid-in capital	457,060	417,228
Accumulated other comprehensive gain (loss)	261	(70)
Accumulated deficit	(23,555)	(117,736)
Total stockholders’ equity	371,182	275,882
Total liabilities and stockholders’ equity	$ 412,312	$ 311,694