Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating activities
Net income	$ 5,079	$ 6,608
Less: income from discontinued operations	0	731
Income from continuing operations	5,079	5,877
Adjustments to reconcile net income to net cash provided by operating activities:
Non-cash change in estimated fair value of contingent liabilities	140	1,306
Realized gain on sale of short-term investment	(66)	(406)
Depreciation and amortization	2,979	2,575
Amortization of premium (discount) on investments, net	(46)	320
Amortization of debt discount and issuance fees	2,838	2,668
Stock-based compensation	6,045	4,118
Deferred income taxes	1,018	4,101
Change in fair value of the Viking convertible debt receivable and warrants	(76)	15
Loss from Viking	1,083	1,605
Changes in operating assets and liabilities:
Accounts receivable	7,643	(5,604)
Inventory	(1,197)	853
Other current assets	745	16
Accounts payable and accrued liabilities	(1,963)	(4,302)
Other	0	(28)
Net cash provided by operating activities	24,222	13,114
Investing activities
Payments to CVR holders and other contingency payments	(4,998)	(5,446)
Purchases of property and equipment	(87)	(238)
Cash paid for acquisition, net of cash acquired	0	(92,855)
Purchase of short-term investments	(73,352)	(49,892)
Proceeds from sale of short-term investments	17,719	20,270
Proceeds from maturity of short-term investments	30,052	48,401
Net cash used in investing activities	(30,666)	(79,760)
Financing activities
Net proceeds from stock option exercises and ESPP	355	1,013
Taxes paid related to net share settlement of equity awards	(2,022)	0
Share repurchase	0	(502)
Net cash (used in) provided by financing activities	(1,667)	511
Net decrease in cash and cash equivalents	(8,111)	(66,135)
Cash and cash equivalents at beginning of period	18,752	97,428
Cash and cash equivalents at end of period	10,641	31,293
Supplemental disclosure of cash flow information
Interest paid	919	919
Taxes paid	96	1
Supplemental schedule of non-cash activity
Stock issued for acquisition, net of issuance cost	0	(77,615)
Accrued inventory purchases	3,909	600
Unrealized loss on AFS investments	$ (66)	$ (1,834)