Loan Agreement (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Loan Agreement [Line Items]
Excess cash capacity	$ 10,000
Credit Facility (Textual) [Abstract]
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	35,500
Interest Paid	$ 264	$ 320
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