Loan Agreement Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Line of Credit Facility [Line Items]
Secured Debt, Current	$ 841,000	$ 925,000
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	$ 20,000,000
Credit Facility, remaining borrowing capacity	35,000,000
Interest Paid	$ 200,000	$ 500,000	$ 800,000
Weighted average interest rate	3.50%
Letters of Credit Outstanding, Amount	$ 1,500,000
Excess cash capacity	$ 10,000,000
Maximum
Credit Facility (Textual) [Abstract]
Spread on LIBOR	1.85%
Dividends restricted amount	$ 7,000,000.0
Minimum
Credit Facility (Textual) [Abstract]
Spread on LIBOR	1.50%
Revolving Credit Facility [Member]
Credit Facility (Textual) [Abstract]
Credit facility, borrowing capacity	$ 40,000,000
Letter of Credit [Member]
Credit Facility (Textual) [Abstract]
Credit facility, borrowing capacity	$ 10,000,000