XML 36 R24.htm IDEA: XBRL DOCUMENT v3.19.2
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
Jun. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Significant Accounting Policies [Line Items]      
Right of use leases $ 193,399 $ 232,000  
Total operating lease liabilities 193,400 $ 241,000  
Fair Value, Measurements, Recurring [Member]      
Significant Accounting Policies [Line Items]      
Cash and cash equivalents $ 5,600,000   $ 6,800,000