Stockholders' Equity (Deficit) (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2009
Stockholders Equity [Line Items]
Common stock, shares authorized		150,000,000	150,000,000
Common stock, par value		$ 0.001	$ 0.001
Common stock, shares issued		52,268,007	52,006,000
Common stock, shares outstanding		45,735,818	45,474,000
Common stock, additional shares				5,000,000
Common stock repurchased, value			$ 630
Percentage of outstanding shares of common stock related to preemptive right		25.00%
Preferred stock, shares authorized		15,000,000	15,000,000
Preferred stock, par value		$ 0.001	$ 0.001
Preferred stock, shares issued		0	0
Preferred stock, shares outstanding		0	0
First Repurchase
Stockholders Equity [Line Items]
Common stock repurchased, shares			167,961
Common stock repurchased, value			$ 300
Second Repurchase
Stockholders Equity [Line Items]
Common stock repurchased, shares	193,416
Common stock repurchased, value	$ 300
Common stock repurchased, per share	$ 1.70
2009 Equity Incentive Plan
Stockholders Equity [Line Items]
Common stock, additional shares		4,592,122