LEASES (Schedule of Lease Income and Expenses) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net lease costs	$ 620,121	$ 601,509	$ 2,090,385	$ 1,776,756
Selling, General and Administrative Expenses [Member]
Operating lease costs	620,121	543,045	2,029,524	1,601,364
Sublease income	0	(2,397)	0	(7,191)
Direct costs [Member]
Operating lease costs	$ 0	$ 60,861	$ 60,861	$ 182,583