INVENTORIES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 3,603,000	$ 2,243,000
Work in process	1,441,000	1,109,000
Finished goods	1,997,000	1,087,000
Gross inventories	7,041,000	4,439,000
Less: provision for obsolescence	(263,000)	(388,000)
Inventories, net	6,778,000	4,051,000
Inventory write-down	$ 0	400,000
Inventory write down reversals		$ 100,000