PREPAID EXPENSES AND OTHER ASSETS (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
PREPAID EXPENSES AND OTHER ASSETS (Details)
Prepaid consulting services	$ 0	$ 14,000
Prepaid clinical study	0	32,000
Prepaid insurance	113,000	347,000
PPE deposits	0	700,000
Prepaid equipment	67,000	61,000
Prepaid deposit for inventory	165,000	211,000
Prepaid expenses	40,000	66,000
Other assets	129,000	79,000
Total Prepaid expenses and other assets	514,000	1,510,000
Current portion of prepaid expenses and other assets	(431,000)	(1,452,000)
Prepaid expenses and other assets less current portion	$ 83,000	$ 58,000