MARKETABLE SECURITIES (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Fair Value [Member]
Other Investment Not Readily Marketable [Line Items]
Certificates of deposit	$ 3,000,000
Government securities	10,001,000
Fixed income mutual funds	13,416,000	$ 14,325,000
Corporate bonds and notes	176,000	801,000
Total marketable securities	26,593,000	15,126,000
Cost Basis [Member]
Other Investment Not Readily Marketable [Line Items]
Certificates of deposit	3,000,000
Government securities	9,998,000
Fixed income mutual funds	14,221,000	14,462,000
Corporate bonds and notes	192,000	813,000
Total marketable securities	27,411,000	15,275,000
Gross Unrealized Gains [Member]
Other Investment Not Readily Marketable [Line Items]
Certificates of deposit
Government securities	3,000
Fixed income mutual funds
Corporate bonds and notes
Total marketable securities	3,000
Gross Unrealized Losses [Member]
Other Investment Not Readily Marketable [Line Items]
Certificates of deposit
Government securities
Fixed income mutual funds	(805,000)	(137,000)
Corporate bonds and notes	(16,000)	(12,000)
Total marketable securities	$ (821,000)	$ (149,000)