Debt (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Short-term Debt [Line Items]
Debt Issuance Costs	$ 0	$ 300,000	$ 0
Debt and Capital Lease Obligations	61,400,000	59,900,000
Interest rate for borrowings	8.80%	7.90%
Brazil [Member]
Short-term Debt [Line Items]
Revolving line of credit maximum borrowing capacity	41,400,000
Consolidated borrowings	35,400,000
Line of Credit Facility, Remaining Borrowing Capacity	6,000,000
India [Member]
Short-term Debt [Line Items]
Revolving line of credit maximum borrowing capacity	14,200,000
Consolidated borrowings	13,800,000
Line of Credit Facility, Remaining Borrowing Capacity	400,000
Europe [Member]
Short-term Debt [Line Items]
Other Short-term Borrowings	0
Available overdraft line	300,000
InsurancePremiumFinanced [Member] | UNITED STATES
Short-term Debt [Line Items]
Other Short-term Borrowings	200,000
Duration of Repayment	4 months
PNC Bank [Member]
Short-term Debt [Line Items]
Revolving Credit and Security Agreement initial date	Apr. 21, 2011
Revolving line of credit maximum borrowing capacity	45,000,000
Revolving Credit and Security Agreement expiring date	Apr. 21, 2015
Unused portion of the facility	0.375%
Consolidated borrowings	10,000,000
Line of Credit Facility, Remaining Borrowing Capacity	2,100,000
Debt Issuance Costs		300,000
PNC Bank [Member] | Letter of Credit [Member]
Short-term Debt [Line Items]
Revolving line of credit maximum borrowing capacity	10,000,000
Letters of Credit Outstanding, Amount	$ 3,400,000	$ 3,500,000