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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 51,024 $ 20,620
Short-term investments 213,329 181,041
Investment in Viking 27,535 0
Accounts receivable, net 37,108 25,596
Note receivable from Viking 3,877 3,877
Inventory 10,531 4,373
Other current assets 5,647 1,514
Total current assets 349,051 237,021
Deferred income taxes 69,368 84,422
Investment in Viking 0 6,438
Intangible assets, net 225,306 228,584
Goodwill 85,961 85,959
Commercial license rights, net 19,969 19,526
Property and equipment, net 4,119 4,212
Other assets 894 4,859
Total assets 754,668 671,021
Current liabilities:    
Accounts payable 3,407 2,259
Accrued liabilities 8,480 7,377
Current contingent liabilities 7,545 4,703
2019 convertible senior notes, net 227,547 224,529
Total current liabilities 246,979 238,868
Long-term contingent liabilities 6,376 9,258
Long-term deferred revenue, net 3,000 3,525
Other long-term liabilities 1,135 723
Total liabilities 257,490 252,374
Commitments and contingencies
Equity component of currently redeemable convertible notes (Note 3) 16,078 18,859
Stockholders' equity:    
Common stock, $0.001 par value; 33,333,333 shares authorized; 21,301,980 and 21,148,665 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively 21 21
Additional paid-in capital 808,765 798,205
Accumulated other comprehensive (loss) income (286) 2,486
Accumulated deficit (327,400) (400,924)
Total stockholders' equity 481,100 399,788
Total liabilities and stockholders' equity $ 754,668 $ 671,021