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SHAREHOLDERS' EQUITY - STOCK BASED COMPENSATION (Details) - shares
Feb. 20, 2015
Jan. 25, 2015
Jun. 18, 2009
Jun. 30, 2017
Dec. 31, 2014
2009 Plan | Stock options, all inclusive recipients          
Stock-based compensation          
Shares authorized for issue under the plan     55,971   978,655
Vesting period     3 years    
Expiration period     7 years    
Additional shares authorized   1,072,879      
Shares available for future grant (in shares)       1,047,882  
Amended and Restated 2009 Stock Incentive Plan          
Stock-based compensation          
Expiration period 10 years