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Certain Relationships and Related Party Transactions (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Jul. 31, 2013
INOVA Geophysical [Member]        
Related Party Transaction [Line Items]        
Basis spread on variable rate   6.50%    
Interest rate effective on notes receivable due from related party   15.00%    
Majority Shareholder [Member]        
Related Party Transaction [Line Items]        
Related party transaction, revenues from transactions with related party $ 6.3 $ 6.5 $ 8.0  
Receivables due from BGP $ 0.3 $ 1.1    
Company's outstanding common stock owned by related parties   14.80%    
Board of Directors Chairman [Member]        
Related Party Transaction [Line Items]        
Company's outstanding common stock owned by related parties 7.40%      
Payments for continued services agreement $ 0.8      
Board of Directors Chairman [Member] | Manufacturing Facility [Member]        
Related Party Transaction [Line Items]        
Payments for continued services agreement 0.7      
Board of Directors Chairman [Member] | Other services [Member]        
Related Party Transaction [Line Items]        
Payments for continued services agreement 0.1      
Board of Directors Chairman [Member] | Rent and other pass through third party facilities charges [Member]        
Related Party Transaction [Line Items]        
Payments for continued services agreement   $ 2.4 $ 4.2  
INOVA Geophysical [Member]        
Related Party Transaction [Line Items]        
Receivables due from BGP 4.0      
Notes receivable due from related parties   $ 0.0   $ 10.0
Proceeds from related party debt $ 6.0