ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
ACCOUNTS PAYABLE AND ACCRUED LIABILITIES [Abstract]
Accounts payable - suppliers	$ 6,097,056	$ 5,727,781
Accrued commissions and royalties	541,853	807,708
Accrued payroll	317,364	277,908
Accrued vacation	427,317	417,238
Accrued bonuses	0	1,193,985
Accrued severance	0	511,681
Accrued expenses - other	1,013,404	1,106,489
TOTAL	$ 8,396,994	$ 10,042,790