Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Pro Forma Shareholder's Equity Table (Detail)

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Subsequent Events - Pro Forma Shareholder's Equity Table (Detail) - USD ($)
Jun. 30, 2018
Dec. 31, 2017
Subsequent Event [Line Items]    
Total Shareholders' Equity as of June 30, 2018 $ 3,650,580 $ 6,316,309
Pro forma Total Shareholders' Equity, as of June 30, 2018, as adjusted 15,950,580  
July 17, 2018 [Member]    
Subsequent Event [Line Items]    
Net Proceeds from July 17, 2018 Public Offering $ 12,300,000