SHAREHOLDERS' EQUITY (Narrative) (Details) - USD ($)		3 Months Ended		6 Months Ended		12 Months Ended
	May 21, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Jun. 01, 2020
Stockholders' Equity Note [Abstract]
Net loss		$ (1,039,000)	$ (4,726,000)	$ (317,000)	$ (5,586,000)	$ (8,619,000)
Dividends paid		(152,000)	(152,000)	(304,000)	(304,000)	(607,000)
Other comprehensive income, net of tax		604,000	3,361,000	(542,000)	876,000	1,142,000
Common stock issued		$ 26,000	25,000	$ 26,000	25,000	25,000
Treasury stock acquired			$ 15,000		$ 21,000	$ 36,000
Shares of common stock repurchased and placed in treasury (in shares)				0		2,509
Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Stock repurchase program, authorized amount							$ 500,000
Directors
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Stock issued for compensation (in shares)	2,262