Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2013

Derivative Instruments [Abstract]

Gain Loss on Derivative Instruments

Gain (Loss) on Derivative Instruments	Three months ended September  30, 2013		Three months ended September 30, 2012
Warrants expiring April 30, 2015		(1,288)		(129)
Warrants expiring March 29, 2016		(394)		(6)
Options to contractors		(26)		(4)
Gain (loss) on Derivative Instruments		(1,708)		(139)

Gain on Derivative Instruments	Nine months ended September 30, 2013		Nine months ended September 30, 2012
Warrants expiring April 30, 2015		1,681		2,852
Warrants expiring March 29, 2016		555		940
Options to contractors		18		40
Gain on Derivative Instruments		2,254		3,832