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Settlement of Acquisition Obligations - Classification (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Business Acquisition [Line Items] |  |  |
Change in estimate of contingent liabilities | $ 0 | $ 0 | $ 12
Settlement of acquisition obligations | $ 0 | $ 0 | 892
Forgiveness of net receivable due to us |  |  |
Business Acquisition [Line Items] |  |  |
Change in estimate of contingent liabilities |  |  | 78
Adjustment to performance-related contingent obligation |  |  |
Business Acquisition [Line Items] |  |  |
Change in estimate of contingent liabilities |  |  | (66)
Forgiveness of special fee |  |  |
Business Acquisition [Line Items] |  |  |
Settlement of acquisition obligations |  |  | 500
Forgiveness of convertible promissory note, including interest |  |  |
Business Acquisition [Line Items] |  |  |
Settlement of acquisition obligations |  |  | 592
Payment by us |  |  |
Business Acquisition [Line Items] |  |  |
Settlement of acquisition obligations |  |  | $ (200)

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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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