NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently issued accounting pronouncements (Details) - USD ($)	Dec. 31, 2016	Jan. 02, 2016
Deferred income taxes, non current	$ 1,616,000	$ 3,149,000
Accounting Standards Update 2015-17
Deferred income taxes, non current		1,078,000
Accounting Standards Update 2015-17 | Restatement Adjustment
Noncurrent assets, net	$ 1,616,000	$ 3,149,000