Net Income (Loss) Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 0 Months Ended
Mar. 31, 2014
Mar. 31, 2013
May 22, 2013
Common Class A [Member]
May 22, 2013
Common Class B [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Number of shares sold by existing shareholders     2,000,000 6,230,000
Stock Issued During Period, Shares, New Issues 4,000,000   3,200,000  
Net loss attributable to common stockholders - basic and diluted $ (5,629) $ (4,035)    
Weighted average shares outstanding used to compute basic and diluted net income per share 63,444,000 34,833,000    
Net loss per share attributable to common stockholders - basic and diluted $ (0.09) $ (0.12)