Equity (Details) In Thousands, except Share data, unless otherwise specified	1 Months Ended	6 Months Ended			6 Months Ended
	Feb. 29, 2012 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2011 USD ($)	Feb. 08, 2012 AUD	Jun. 30, 2012 Selling, general and administrative expense USD ($)	Jun. 30, 2011 Selling, general and administrative expense USD ($)	Jun. 30, 2012 Research and development expense USD ($)	Jun. 30, 2011 Research and development expense USD ($)
Private Placement
Common stock placed (in shares)	256,875
Common stock offering price (in dollars per share)				8.00
Proceeds from private placement offering net of transaction costs	$ 2,061	$ 2,068	$ 183
Stock-Based Compensation
Compensation expense					$ 402	$ 31	$ 219	$ 11