EQUITY AND STOCK COMPENSATION PLANS - Employee Stock Purchase Plan (Details) - Employee Stock Purchase Plan [Member] - shares		1 Months Ended	12 Months Ended
	Nov. 29, 2005	Jun. 30, 1996	Dec. 31, 2019	Dec. 31, 2018
EQUITY AND STOCK COMPENSATION PLANS
Percentage of common stock at a price lower of the fair market value	95.00%	85.00%
Period of common stock offering	6 months	6 months
Minimal discount of fair market value of the common stock	5.00%
Percentage of employee's compensation	6.00%
Total number of common stock shares reserved for issuance	350,000
Number of common stock shares reserved for issuance			39,023
Issuance of common stock under employee stock purchase plan (in shares)			13,699	13,667