Debt (Details Textual)	12 Months Ended									3 Months Ended	12 Months Ended				12 Months Ended					3 Months Ended	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 Brazil [Member] USD ($)	Dec. 31, 2014 Insurance Premium Financed [Member] United States [Member] USD ($)	Dec. 31, 2014 Domestic Line of Credit [Member] Letter of Credit [Member] United States [Member] USD ($)	Dec. 31, 2013 Domestic Line of Credit [Member] Letter of Credit [Member] United States [Member] USD ($)	Dec. 31, 2014 Foreign Line of Credit [Member] Brazil [Member] USD ($)	Dec. 31, 2014 Foreign Line of Credit [Member] India [Member] USD ($)	Mar. 31, 2014 Pnc Bank [Member] United States [Member] USD ($)	Dec. 31, 2014 Pnc Bank [Member] United States [Member] USD ($)	Dec. 31, 2014 Pnc Bank [Member] Revolving Credit Facility [Member] United States [Member] USD ($)	Dec. 31, 2014 Pnc Bank [Member] Secured Debt [Member] United States [Member] USD ($)	Dec. 31, 2013 Pnc Bank [Member] Secured Debt [Member] United States [Member] USD ($)	Dec. 31, 2014 Pnc Bank [Member] Letter of Credit [Member] United States [Member] USD ($)	Dec. 31, 2014 Software Financed [Member] United States [Member] USD ($)	Dec. 31, 2014 Capital Lease Obligations [Member] USD ($)	Dec. 31, 2014 Secured loan, Mississippi Development Authority [Member] Secured Debt [Member] United States [Member] USD ($)	Apr. 30, 2013 Secured loan, Mississippi Development Authority [Member] Secured Debt [Member] United States [Member] USD ($)	Sep. 30, 2014 Special Term Governmental Loan [Member] Brazil [Member] USD ($)	Dec. 31, 2014 Special Term Governmental Loan [Member] Brazil [Member] USD ($)	Dec. 31, 2014 Special Term Governmental Loan [Member] Brazil [Member] BRL	Dec. 31, 2014 London Interbank Offered Rate (LIBOR) [Member] Pnc Bank [Member] Revolving Credit Facility [Member] United States [Member]
Short-term Debt [Line Items]
Revolving line of credit maximum borrowing capacity								$ 37,600,000.0	$ 12,400,000.0			$ 34,000,000		$ 15,000,000	$ 10,000,000				$ 1,500,000.0
Description of variable rate basis																							LIBOR
Revolving line of credit, expiration date															Dec. 11, 2018
Debt issuance costs	600,000	200,000	0							400,000											100,000
Unamortized debt issuance expense											100,000
Amortization of debt financing costs term											5 years
Unused capacity, facility fee												0.375%
Line of credit facility, remaining borrowing capacity								19,800,000	3,900,000			400,000
Line of credit facility, fair value of amount outstanding												300,000
Long-term debt													8,300,000
Outstanding letters of credit						6,400,000	3,200,000
Fixed interest rate																			2.25%
Consolidated borrowings																		1,300,000
Short-term borrowings outstanding					300,000
Long-term debt, gross																400,000
Total amount of loan approved																						82,500,000
Required spending on financed projects																						35,300,000
Maturity date range, start																					Jul. 31, 2017	Jul. 31, 2017
Maturity date range, end																					Jul. 31, 2023	Jul. 31, 2023
First installment of loan																				11,000,000
Restricted cash and cash equivalents	6,200,000	14,200,000																		500,000
Collateral amount on loan																					5,100,000
Total short-term and long-term debt				28,800,000
Short-term Debt									8,500,000
Capital lease obligations																	1,100,000
Debt and capital lease obligations	$ 49,200,000	$ 67,200,000
Interest rate for borrowings	9.00%	8.10%