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STOCK-BASED COMPENSATION - Stock Options and Stock Appreciation Rights Grants and Liability (Details) - USD ($)
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Stock-based compensation      
Accrued Stock-Based Compensation $ 45,046   $ 42,092
Stock Options and Stock Appreciation Rights      
Stock-based compensation      
Accrued Stock-Based Compensation $ 45,000   $ 42,000
2001 Stock Option Plan | Stock Option      
Stock-based compensation      
Granted (in shares) 0 0  
2001 Stock Option Plan | Stock Appreciation Rights      
Stock-based compensation      
Granted (in shares) 0 0