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STOCK OPTION PLAN AND STOCK-BASED COMPENSATION - Schedule of RSU Activity (Details) - RSUs
Mar. 31, 2018
$ / shares
shares
Stock Options  
Unvested at the beginning of the period (in shares) | shares 185,950
Unvested at the end of the period (in shares) | shares 185,950
Weighted-Average Grant Date Fair Value  
Unvested, Weighted-Average Grant Date Fair Value | $ / shares $ 11.86
Unvested, Weighted-Average Grant Date Fair Value | $ / shares $ 11.86