Annual report pursuant to Section 13 and 15(d)

Income Taxes Income Tax Expense (Benefit) (Details)

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Income Taxes Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount $ (14,588) $ (2,973) $ (4,191)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount 275 (391) 1
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount (2,083) (66) (3,630)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount (62) (31) (80)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount 549 609 460
Income Tax Reconciliation Foreign Dividends 279 0 835
Income tax impact to provision due to transaction costs 1,329 0 0
Income Tax Reconciliation, Uncertain Tax Position 600 304 266
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount (144) 0 0
Current Foreign Tax Expense (Benefit) 942 577 574
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount 96 92 356
Valuation Allowance, Deferred Tax Asset, Release due to Acquisition, amount (1,757) (2,335) 0
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount 14,931 3,087 6,385
Provision (benefit) for income taxes $ (575) $ (1,704) $ 402