Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating activities
Net income	$ 11,137	$ 438
Less: income from discontinued operations	0	731
Income (loss) from continuing operations	11,137	(293)
Adjustments to reconcile net income to net cash provided by operating activities:
Non-cash change in estimated fair value of contingent liabilities	966	1,638
Realized gain on sale of short-term investment	(248)	(602)
Depreciation and amortization	5,564	5,388
Amortization of premium (discount) on investments, net	(44)	331
Amortization of debt discount and issuance fees	5,720	5,378
Stock-based compensation	10,669	8,766
Deferred income taxes	3,224	187
Change in fair value of the Viking convertible debt receivable and warrants	77	(310)
Loss from Viking	2,330	12,743
Changes in operating assets and liabilities:
Accounts receivable	1,263	(3,791)
Inventory	(4,286)	(2,202)
Other current assets	314	(629)
Accounts payable and accrued liabilities	(2,153)	(3,323)
Other	75	204
Net cash provided by operating activities	34,608	23,485
Investing activities
Purchase of commercial license rights	0	(17,691)
Payments to CVR holders and other contingency payments	(4,998)	(5,635)
Purchases of property and equipment	(199)	(1,021)
Cash paid for acquisition, net of cash acquired	0	(92,504)
Purchase of short-term investments	(124,282)	(49,892)
Purchase of Viking common stock and warrants	0	(700)
Proceeds received from repayment of Viking note receivable	0	300
Proceeds received from repayment of commercial license rights	2,859	0
Proceeds from sale of short-term investments	83,268	22,077
Proceeds from maturity of short-term investments	51,887	83,523
Net cash provided (used) in investing activities	8,535	(61,543)
Financing activities
Net proceeds from stock option exercises and ESPP	2,370	2,482
Taxes paid related to net share settlement of equity awards	(4,042)	0
Share repurchase	0	(502)
Net cash (used in) provided by financing activities	(1,672)	1,980
Net increase (decrease) in cash and cash equivalents	41,471	(36,078)
Cash and cash equivalents at beginning of period	18,752	97,428
Cash and cash equivalents at end of period	60,223	61,350
Supplemental disclosure of cash flow information
Interest paid	919	919
Taxes paid	132	36
Supplemental schedule of non-cash activity
Stock issued for acquisition, net of issuance cost	0	(77,615)
Stock and warrant received for repayment of Viking notes receivable	0	1,200
Unrealized gain (loss) on AFS investments	$ 24	$ (1,198)