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STOCK-BASED COMPENSATION PLANS - Summary of restricted stock award activity (Details) - Restricted Stock [Member]
6 Months Ended
Jun. 30, 2019
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding at Beginning 76,000
Granted 10,000
Forfeited 0
Vested (15,000)
Outstanding At Ending 71,000