Quarterly report pursuant to Section 13 or 15(d)

E. ACCRUED LIABILITIES AND EXPENSES (Details)

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E. ACCRUED LIABILITIES AND EXPENSES (Details) - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accrued liabilities and expenses      
Accrued liabilities and expenses $ 333,481 $ 198,906  
Accrued payroll and payroll taxes 567,047 386,521  
Accrued sales taxes, penalties, and interest 228,844 229,768  
Accrued interest 66 291  
Product warranties 73,822 66,555 $ 44,288
Total accrued liabilities and expenses $ 1,203,260 $ 882,041