Equity (Details 2) In Thousands, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended	3 Months Ended				9 Months Ended					3 Months Ended		9 Months Ended		3 Months Ended			9 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2013 RSUs Director USD ($)	Sep. 30, 2013 RSUs Executive USD ($)	Sep. 30, 2013 Warrants	Dec. 31, 2012 Warrants	Sep. 30, 2013 Warrants Exercise price of AU$6.40 USD ($)	Sep. 30, 2013 Warrants Exercise price of AU$6.40 AUD	Sep. 30, 2013 Amended and Restated 2011 Equity Incentive Plan	Sep. 30, 2013 2013 New Hire Plan	Sep. 30, 2013 2013 Non-Executive Directors' Equity Incentive Plan	Sep. 30, 2013 Selling, general and administrative expense USD ($)	Sep. 30, 2012 Selling, general and administrative expense USD ($)	Sep. 30, 2013 Selling, general and administrative expense USD ($)	Sep. 30, 2012 Selling, general and administrative expense USD ($)	Sep. 30, 2013 Selling, general and administrative expense RSUs USD ($)	Sep. 30, 2013 Research and development expense USD ($)	Sep. 30, 2012 Research and development expense USD ($)	Sep. 30, 2013 Research and development expense USD ($)	Sep. 30, 2012 Research and development expense USD ($)
Stock-Based Compensation
Compensation expense												$ 888	$ 192	$ 1,491	$ 594	$ 79	$ 328	$ 23	$ 614	$ 315
Stock-Based Compensation
Unrecognized compensation costs related to non-vested stock option awards	4,906	4,906
Unrecognized compensation costs related to non-vested stock option awards, recognition period		4 years
Shares granted (in shares)	46,509		10,597	46,509
Vested (in dollar per share)			$ 7.50	$ 10.90
Stock options granted to non employees	21,803
Fair value of stock options granted	76
Vesting percentage per month	83.333%
Common stock grants, net of income tax withholdings (in shares)	27,451
Value of common stock granted	507
Number of shares withheld to fund income tax withholdings	19,508
Vesting period of options	4 years
Contractual life of options	10 years
Shares authorized for grant									254,768	318,993	177,099
Warrants
Number of shares of common stock that outstanding warrants can purchase					1,632,257	1,633,253
Number of shares of common stocks were purchased by exercising warrants							996
Price of common stock per share in exercising warrants (in dollars per share)								6.40
Total proceeds on exercise of warrants							$ 6