Quarterly report pursuant to Section 13 or 15(d)

D. ACCRUED LIABILITIES AND EXPENSES (Tables)

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D. ACCRUED LIABILITIES AND EXPENSES (Tables)
6 Months Ended
Jun. 30, 2017
Payables and Accruals [Abstract]  
Accrued Liabilities and Expenses
    June 30,
2017
    December 31,
2016
 
Accrued liabilities and expenses   $ 381,321     $ 223,011  
Accrued payroll and payroll taxes     293,807       331,908  
Accrued sales taxes, penalties, and interest     103,572       274,869  
Accrued interest           253  
Product warranties     70,383       95,540  
Total accrued liabilities and expenses   $ 849,083     $ 925,581