Loan Agreement (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Loan Agreement [Line Items]
Excess cash capacity		$ 10,000
Credit Facility (Textual) [Abstract]
Proceeds from (Repayments of) Lines of Credit		$ (841)	$ (925)
Proceeds from Secured Lines of Credit	$ 16,300
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		0		$ 841
Credit Facility, remaining borrowing capacity		36,000
Interest Paid		$ 398	$ 485
Weighted average interest rate		3.91%	3.50%
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