SHAREHOLDERS' EQUITY (Narrative) (Details) - USD ($)		3 Months Ended		6 Months Ended		12 Months Ended
	May 22, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Jun. 01, 2020
Stockholders' Equity Note [Abstract]
Net income (loss)		$ (4,726,000)	$ (587,000)	$ (5,586,000)	$ 1,856,000	$ 4,067,000
Dividends paid		(152,000)	(127,000)	(304,000)	(253,000)	(531,000)
Other comprehensive income, net of tax		3,361,000	1,772,000	876,000	3,531,000	4,013,000
Common stock issued		25,000	$ 53,000	25,000	$ 53,000	53,000
Treasury stock acquired		$ 15,000		$ 21,000		$ 7,000
Shares of common stock repurchased and placed in treasury (in shares)				1,431		436
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]
Shares issued under incentive plan (in shares)	1,763