SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 1) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Contract liabilities beginning balance	$ 994,000	$ 456,000
Additions	435,000	1,033,000
Customer deposits returned	(713,000)	0
Transfers to Revenue	(105,000)	(495,000)
Contract liabilities ending balance	$ 611,000	$ 994,000