Short-Term Borrowings (Details) (Line of Credit [Member], Line of Credit [Member], USD $)	12 Months Ended
	Dec. 31, 2012
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 40,000,000
Line of Credit Facility, Interest Rate at Period End	3.25%
Line of Credit Facility, Variable Interest Rate, Base Percent	0.21%
Debt Instrument, Basis Spread on Variable Rate	1.25%
Line of Credit Facility, Commitment Fee Amount	35,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.375%
Line of Credit Facility, EBITDA Requirements	3,000,000
Line of Credit Facility, Current Borrowing Capacity	25,100,000
United States Accounts Receivable Balance [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Borrowing Formula, Eligible Accounts Receivable	80.00%
Foreign Accounts Receivable Balance [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Borrowing Formula, Eligible Accounts Receivable	65.00%
Maximum [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Borrowing Formula, Eligible Accounts Receivable past due	60 days
Line of Credit Facility, Borrowing Formula, Eligible Accounts Receivable, Days from Invoice Date	120 days
Line of Credit Facility, Covenant Terms, Liquidity Ratio, Allowable Subsidiary Cash Balance	10,000,000
Line of Credit Facility, Covenant Terms, 2012 Capital Expenditures	20,000,000
Line of Credit Facility, Covenant Terms, 2013 and Beyond Capital Ependitures	$ 8,000,000
Minimum [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Covenant Terms, Liquidity Ratio	1.25