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BASIC AND DILUTED INCOME PER SHARE (Detail Textuals) - shares
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Outstanding stock options included in the calculation of diluted EPS 9,000 30,000
Stock options    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share 0 0