LIABILITY FOR EMPLOYEE RIGHTS UPON RETIREMENT (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Employee severance obligation payments	$ 164,000	$ 168,000	$ 195,000
Contributions	675,000	675,000	779,000
Expected severance liabilities payments for fiscal year end 2016	869,000
Expected contribution to one or more Contribution Plans	708,000
Severance expense	842,000	800,000	1,000,000
Net gain (loss) for the period	(7,000)	$ (18,000)	$ 22,000
Benefits Payable During Next Five Years	$ 209,000