Debt (Details Textual) In Thousands, unless otherwise specified	1 Months Ended	9 Months Ended			9 Months Ended				9 Months Ended						3 Months Ended
	May 31, 2012 USD ($)	Sep. 30, 2012 Credit_Agreement	Sep. 11, 2012 USD ($)	Sep. 11, 2012 CNY	Sep. 30, 2012 W.E.T. Bank of America credit facility [Member]	Sep. 30, 2012 Eurocurrency Rate Loans [Member]	Sep. 30, 2012 Base Rate Loans [Member]	May 16, 2012 W.E.T. Term Note [Member] USD ($)	Sep. 30, 2012 Maximum [Member] Federal Funds Rate [Member]	Sep. 30, 2012 Maximum [Member] US Bank of America credit facility [Member]	Sep. 30, 2012 Maximum [Member] Eurocurrency Rate Loans [Member]	Sep. 30, 2012 Minimum [Member] Federal Funds Rate [Member]	Sep. 30, 2012 Minimum [Member] W.E.T. Bank of America credit facility [Member]	Sep. 30, 2012 Minimum [Member] Eurocurrency Rate Loans [Member]	Mar. 31, 2012 Series C convertible preferred stock [Member]
Debt (Textual) [Abstract]
Interest rate					20.00%	2.50%	2.00%		0.50%	3.25%	0.60%	0.09%	1.00%	0.20%
Percentage of convertible preferred stock															8.00%
Net proceeds from the sale of treasury shares								$ 6,353
Debt (Additional Textual) [Abstract]
Outstanding credit agreements		2
Principal amortization of credit facility percentage year one		10.00%
Principal amortization of credit facility percentage year two		12.50%
Principal amortization of credit facility percentage year three		15.00%
Principal amortization of credit facility percentage year four		17.50%
Principal amortization of credit facility percentage year five		20.00%
Credit facility due date		Mar. 30, 2016
Debt instrument, description		The Company has the option to elect interest rates based on either a Eurocurrency (LIBOR or EUIBOR) rate (“Eurocurrency Rate Loans”) (0.20% – 0.60% at September 30, 2012) or a base rate (“Base Rate Loans”) plus a margin (“Applicable Rate”) which varies based on the Consolidated Leverage Ratio of the Company, as defined by the US and W.E.T. Bank of America credit agreements. The base rate is equal to the highest of the Federal Funds Rate (0.09% at September 30, 2012) plus 0.5%, Bank of America’s prime rate (3.25% at September 30, 2012), or a one month Eurocurrency rate plus 1.0%. The Applicable Rate for the current period is 2.5% for Eurocurrency Rate Loans and 2.0% for Base Rate Loans.
Sale of Treasury Stock	8,237
Loan borrowed from Bank of China			$ 3,159	20,000
Fixed interest rate			6.90%	6.90%