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Derivative Instruments - Derivative Instruments Gain Loss RMB Warrants (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gain (loss) in thousands	$ 77	$ 96	$ (142)	$ 953
Life (in months)	11	23	11	23
Volatility	0.62	0.57	0.62	0.57
Stock price (per share)	0.0010	0.0030	0.0010	0.0030
Risk free interest rate	0.0010	0.0030	0.0010	0.0030