Quarterly report pursuant to Section 13 or 15(d)

Fair Value - Fair Value Liability Reconciliation (Details)

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Fair Value - Fair Value Liability Reconciliation (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Reconciliation of liability related to earnout          
Balance at the beginning of the period     $ 10,373    
Payments to former owners     (5,487)    
Balance at the end of the period $ 4,886   4,886    
Recurring | Henderson          
Fair value liability reconciliation          
Derivative Liability, Current   $ 263   $ 263  
Derivative Liability, Noncurrent   442   442  
Recurring | Level 2          
Fair value liability reconciliation          
Derivative Liability, Current 442   442   $ 335
Derivative Liability, Noncurrent 2,294   2,294   $ 1,650
Recurring | Level 3 | Henderson          
Reconciliation of liability related to earnout          
Balance at the beginning of the period 607 709 636 761  
Payments to former owners (27) (4) (56) (56)  
Balance at the end of the period 580 $ 705 580 $ 705  
Earnout, portion in other current liabilities 138   138    
Earnout, portion in other long term liabilities 442   442    
Recurring | Level 3 | Dejana          
Reconciliation of liability related to earnout          
Balance at the beginning of the period 4,886        
Balance at the end of the period 4,886   4,886    
Earnout, portion in other current liabilities 3,397   3,397    
Earnout, portion in other long term liabilities $ 1,489   $ 1,489