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 ($)
Jun. 30, 2017
Dec. 31, 2016
Accrued Liabilities [Line Items]    
Accrued Wages and Related Costs $ 128,063 $ 119,472
Accrued Compensation 523,802 648,720
Accrued Professional Services 155,746 137,099
Accrued Warranty Obligations 75,603 41,132
Accrued Interest 171,237 375,560
Other Accrued Expenses 10,000 10,000
Total $ 1,064,451 $ 1,331,983