Short-Term Borrowings (Details) (USD $)	6 Months Ended								3 Months Ended	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2012	Sep. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2012 United States Accounts Receivable Balance [Member]	Jun. 30, 2012 Foreign Accounts Receivable Balance [Member]	Jun. 30, 2012 Maximum [Member]	Jun. 30, 2012 Maximum [Member]	Jun. 30, 2012 Minimum [Member]	Jun. 30, 2012 Non-formula basis [Member]	Jun. 30, 2012 Formula basis [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 40,000,000											$ 20,000,000	$ 20,000,000
Line of Credit Facility, Borrowing Formula, Eligible Accounts Receivable							80.00%	65.00%
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, Interest Rate at Period End	3.25%
Line of Credit Facility, Variable Interest Rate, Base Percent	0.24%
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, Covenant Terms, Liquidity Ratio											1.25
Line of Credit Facility, Covenant Terms, Liquidity Ratio, Allowable Subsidiary Cash Balance										10,000,000
Line of Credit Facility, EBITDA Requirements	(500,000)	3,000,000	2,000,000	(2,100,000)	(8,500,000)	(8,300,000)
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
Line of Credit Facility, Remaining Borrowing Capacity	$ 40,000,000