Annual report pursuant to Section 13 and 15(d)

Accrued Expenses (Components of Accrued Expenses) (Detail)

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Accrued Expenses (Components of Accrued Expenses) (Detail) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Accrued Liabilities [Line Items]    
Accrued Wages and Related Costs $ 163,305 $ 119,472
Accrued Compensation 327,469 648,720
Accrued Professional Services 531,728 137,099
Accrued Warranty Obligations 167,503 41,132
Accrued Interest 171,435 375,560
Other Accrued Expenses 10,000 10,000
Total $ 1,371,440 $ 1,331,983