Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses (Components of Accrued Expenses) (Detail)

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Accrued Expenses (Components of Accrued Expenses) (Detail) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Accrued Liabilities [Line Items]    
Accrued Wages and Related Costs $ 628,130 $ 163,305
Accrued Officer Compensation 0 327,469
Accrued Professional Services 226,348 531,728
Accrued Warranty Obligations 280,852 167,503
Accrued Interest 86,457 171,435
Other Accrued Expenses 20,833 28,331
Total $ 1,242,620 $ 1,389,771