Loan Agreement (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Loan Agreement [Line Items]
Excess cash capacity	$ 10,000
Credit Facility (Textual) [Abstract]
Proceeds from (Repayments of) Lines of Credit	$ 2,308	$ 3,356
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	13,131		$ 10,823
Line of Credit Facility, Remaining Borrowing Capacity	26,000
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	$ 200	$ 200
Weighted average interest rate	4.42%	3.55%
Bank Overdrafts	$ 5,500
Working Capital Ratio	1.35
Ratio of Indebtedness to Net Capital	2.5
Minimum Debt Service Coverage Ratio	1.25
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	2,400
Secured Debt, Current	3,100
Line of Credit [Member] | Revolving Credit Facility [Member]
Credit Facility (Textual) [Abstract]
Long-term Debt	$ 10,800
Prime Rate [Member]
Credit Facility (Textual) [Abstract]
Spread on LIBOR	0.25%