STOCK-BASED COMPENSATION PLANS (Details) - Employee Stock Option [Member] - shares	Dec. 31, 2016	Dec. 31, 2015
2011 Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for issuance on exercise of options	1,447,500	1,867,500
Shares available for future option grants	0	0
1997 Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for issuance on exercise of options	15,000	51,000
Shares available for future option grants
2000 Directors' Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for issuance on exercise of options	40,000	120,000
Shares available for future option grants