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Loan Agreement (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Loan Agreement [Line Items]      
Excess cash capacity $ 10,000    
Credit Facility (Textual) [Abstract]      
Proceeds from (Repayments of) Lines of Credit $ (2,000) $ 1,528  
Eligible accounts receivables percentage 85.00%    
Eligible accounts receivables past due days 60 days    
Eligible inventory percentage 60.00%    
Eligible inventory expected to be sold period 18 months    
Maximum borrowing amount based on inventory $ 20,000    
Revolving Line of Credit 8,823   $ 10,823
Line of Credit Facility, Remaining Borrowing Capacity 30,700    
Interest Paid, Including Capitalized Interest, Operating and Investing Activities $ 400 $ 500  
Weighted average interest rate 4.48% 3.74%  
Bank Overdrafts $ 5,500    
Working Capital Ratio 1.35    
Ratio of Indebtedness to Net Capital 2.5    
Minimum Debt Service Coverage Ratio 1.25    
Stock Repurchase Program, Authorized Amount $ 7,500    
Maximum      
Credit Facility (Textual) [Abstract]      
Spread on LIBOR 1.85%    
Restricted Dividends $ 7,000    
Minimum      
Credit Facility (Textual) [Abstract]      
Spread on LIBOR 1.50%    
Revolving Credit Facility [Member]      
Credit Facility (Textual) [Abstract]      
Credit facility, borrowing capacity $ 40,000    
Letter of Credit [Member]      
Credit Facility (Textual) [Abstract]      
Credit facility, borrowing capacity 10,000    
Bolt [Member]      
Credit Facility (Textual) [Abstract]      
Line of Credit Facility, Remaining Borrowing Capacity 1,800    
Secured Debt, Current 3,700    
Line of Credit [Member] | Revolving Credit Facility [Member]      
Credit Facility (Textual) [Abstract]      
Long-term Debt $ 6,000    
Prime Rate [Member]      
Credit Facility (Textual) [Abstract]      
Spread on LIBOR 0.25%