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Senior Secured Credit Facility (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
May 17, 2017
Apr. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Dec. 01, 2016
Credit facility          
Current outstanding credit facility     $ 125 $ 31  
Credit Agreement          
Credit facility          
Aggregate principal amount         $ 11,000
Weighted average interest rate     5.33%    
Credit Agreement | Minimum          
Credit facility          
Ratio of consolidated EBITDA to fixed charges     1.50%    
Credit Agreement | Maximum          
Credit facility          
Ratio of total indebtedness to consolidated EBITDA     2.00%    
Advance Loan Facility          
Credit facility          
Aggregate principal amount         10,000
Outstanding credit facility     $ 1,500    
Current outstanding credit facility     100    
Additional borrowing   $ 3,000      
Revolving Facility          
Credit facility          
Aggregate principal amount         $ 1,000
Current borrowing base     1,000    
Outstanding credit facility     1,000    
Potential addition borrowing available     $ 1,000    
Revolving Facility | Minimum          
Credit facility          
Ratio of consolidated EBITDA to fixed charges     1.50%    
Subsequent Events | Credit Agreement          
Credit facility          
Repayment of credit facility $ 5,500        
Eligible accounts (as a percent) 80.00%        
Appraised eligible inventory or equipment value (as a percent) 65.00%        
New build, acquired or upgraded inventory or equipment (as a percent) 75.00%        
Default interest rate (as a percent) 5.00%        
Maximum borrowings subject to commitment fees (as a percent) 50.00%        
Unrestricted cash and cash equivalents required $ 10,000        
Unrestricted cash and cash equivalents required (as a percent) 50.00%        
Maximum capital expenditures allowed $ 80,000        
Subsequent Events | Credit Agreement | Minimum          
Credit facility          
Commitment fee (as a percent) 0.1875%        
Subsequent Events | Credit Agreement | Maximum          
Credit facility          
Commitment fee (as a percent) 0.50%        
Ratio of total indebtedness to consolidated EBITDA 2.50%        
Ratio of consolidated EBITDA to fixed charges 1.25%        
Subsequent Events | Credit Agreement | LIBOR | Minimum          
Credit facility          
Applicable margin rate 3.00%        
Subsequent Events | Credit Agreement | LIBOR | Maximum          
Credit facility          
Applicable margin rate 4.00%        
Subsequent Events | Advance Loan Facility          
Credit facility          
Aggregate principal amount $ 0        
Subsequent Events | Revolving Facility          
Credit facility          
Aggregate principal amount 20,000        
Potential addition borrowing available $ 10,000