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SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Numerator [Abstract]          
Net income $ 9,089 $ 3,853 $ 15,257 $ 4,288  
Net income attributable to redeemable non-controlling interests 307 0 307 0  
Net income available to common stockholders, basic and diluted $ 8,782 $ 3,853 $ 14,950 $ 4,288  
Weighted average shares outstanding, basic (in shares) 16,999,746 15,915,864 16,381,944 15,714,310  
Effect of dilutive securities (in shares) 2,354,468 2,253,943 2,317,066 2,101,791  
Weighted average shares outstanding, diluted (in shares) 19,354,214 18,169,807 18,699,010 17,816,101  
Net income per common share [Abstract]          
Basic (in dollars per share) $ 0.52 $ 0.24 $ 0.91 $ 0.27  
Diluted (in dollars per share) $ 0.45 $ 0.21 $ 0.80 $ 0.24  
Recent Accounting Pronouncements [Abstract]          
Operating lease right-of-use assets $ 4,205   $ 4,205   $ 0
Lease liabilities $ 4,205   $ 4,205    
ASU 2018-11 [Member]          
Recent Accounting Pronouncements [Abstract]          
Operating lease right-of-use assets         5,109
Lease liabilities         $ 5,109