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Credit Facility (Details) - Revolving Credit Facility
 12 Months Ended
Dec. 31, 2015
USD ($)
loan
Line of Credit Facility [Line Items]  
Maximum borrowing capacity $ 30,000,000
Potential increase in borrowing capacity 20,000,000
Potential maximum borrowing capacity $ 50,000,000
Borrowing base, component, % of eligible accounts receivable 80.00%
Borrowing base, component, % of eligible inventory 50.00%
Borrowing base, allowable share of total commitment amount attributable to inventory component 50.00%
Borrowing base, component, % of eligible equipment inventory 75.00%
Borrowing base amount available $ 29,500,000
Line of credit $ 417,000
Weighted average interest rate 1.69%
LIBOR-based Rate  
Line of Credit Facility [Line Items]  
Variable rate, applicable margin 1.50%
CB Floating Rate  
Line of Credit Facility [Line Items]  
Variable rate, applicable margin 1.25%
Maximum  
Line of Credit Facility [Line Items]  
Maximum leverage ratio allowed 2.50
Default trigger, certain defaults of other company indebtedness, amount $ 50,000
Default trigger, rendering of certain judgments, amount $ 150,000
Maximum | LIBOR-based Rate  
Line of Credit Facility [Line Items]  
Reference rate, number of allowable LIBOR-based borrowings outstanding | loan 3
Minimum  
Line of Credit Facility [Line Items]  
Minimum commitment coverage ratio allowed 2.00