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12. ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Accrued Expenses And Other Current Liabilities    
Commissions $ 271,750 $ 136,631
Payroll and related costs 142,497 144,359
Director fees 41,250 41,250
Sales Tax Payable 30,973 11,296
Accrued warranty (Note 13) 30,000 30,000
Other accrued expenses 63,956 51,663
Total $ 580,426 $ 415,199