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Condensed Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Operating activities    
Net income: $ 3,384 $ 7,586
Less: gain from discontinued operations 0 2,588
Income from continuing operations 3,384 4,998
Adjustments to reconcile net income including noncontrolling interests to net cash provided by operating activities:    
Non-cash change in estimated fair value of contingent liabilities 3,261 (900)
Write-off of in-process research and development 0 480
Realized gain on sale of short-term investment (968) 0
Gain on write-off of assets (16) 0
Depreciation and amortization 1,337 1,339
Stock-based compensation 5,093 2,616
Non-cash upfront fee (1,211) 0
Deferred income taxes 6 176
Accretion of note payable 169 225
Other 0 (13)
Changes in operating assets and liabilities:    
Accounts receivable (911) 3,890
Inventory 575 429
Other current assets (136) (382)
Other long-term assets (231) 123
Accounts payable and accrued liabilities (3,743) (3,006)
Deferred revenue (24) (318)
Net cash provided by operating activities of continuing operations 6,585 9,657
Net cash used in operating activities of discontinued operations 0 (642)
Net cash provided by operating activities 6,585 9,015
Investing activities    
Purchase of commercial license rights 0 (3,571)
Payments to CVR holders and former license holders (1,668) 0
Proceeds from sale of property and equipment 125 3
Proceeds from sale of short-term investments 1,156 0
Other, net (1) (158)
Net cash used in investing activities (388) (3,726)
Financing activities    
Repayment of debt (6,947) (12,933)
Net proceeds from stock option exercises 3,648 1,186
Net cash used in financing activities (3,299) (11,747)
Net increase (decrease) in cash and cash equivalents 2,898 (6,458)
Cash and cash equivalents at beginning of period 11,639 12,381
Cash and cash equivalents at end of period 14,537 5,923
Supplemental disclosure of cash flow information    
Interest paid 212 1,245
Taxes paid 3 0
Supplemental schedule of non-cash activity    
Liability for commercial license rights 0 1,000
Accrued inventory purchases 0 997
Unrealized gain on AFS investments $ 3,095 $ 1,395