Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Fair Value, Level 3 Rollforward (Details)

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Basis of Presentation and Summary of Significant Accounting Policies - Fair Value, Level 3 Rollforward (Details)
$ in Thousands
 6 Months Ended
Jun. 30, 2017
USD ($)
Earn-out liability  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Beginning balance $ 2,000
Ending balance 1,200
Significant other unobservable inputs (Level 3) | Liability Warrants  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Beginning balance 433
Change in value (215)
Payments 0
Ending balance 218
Significant other unobservable inputs (Level 3) | Contingently Issuable Shares  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Beginning balance 4,545
Change in value (2,260)
Payments 0
Ending balance 2,285
Significant other unobservable inputs (Level 3) | Earn-out liability  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Beginning balance 1,987
Change in value 4
Payments (829)
Ending balance $ 1,162