Quarterly report pursuant to Section 13 or 15(d)

BASIC AND DILUTED NET EARNINGS PER SHARE (Details Textual)

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BASIC AND DILUTED NET EARNINGS PER SHARE (Details Textual) - shares
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Earnings Per Share Basic And Diluted [Line Items]    
Options to purchase Class A common stock 1,942,803 1,634,034
Dilutive shares 501,204 400,366