MARKETABLE SECURITIES (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Fair Value [Member]
Other Investment Not Readily Marketable [Line Items]
Certificates of deposit	$ 2,986,000
Government securities	13,054,000
Fixed income mutual funds	11,541,000	$ 14,325,000
Corporate bonds and notes	178,000	801,000
Total marketable securities	27,759,000	15,126,000
Cost Basis [Member]
Other Investment Not Readily Marketable [Line Items]
Certificates of deposit	3,000,000
Government securities	13,068,000
Fixed income mutual funds	12,580,000	14,462,000
Corporate bonds and notes	192,000	813,000
Total marketable securities	28,840,000	15,275,000
Gross Unrealized Gains [Member]
Other Investment Not Readily Marketable [Line Items]
Certificates of deposit
Government securities
Fixed income mutual funds
Corporate bonds and notes
Total marketable securities
Gross Unrealized Losses [Member]
Other Investment Not Readily Marketable [Line Items]
Certificates of deposit	(14,000)
Government securities	(14,000)
Fixed income mutual funds	(1,039,000)	(137,000)
Corporate bonds and notes	(14,000)	(12,000)
Total marketable securities	$ (1,081,000)	$ (149,000)