XML 38 R26.htm IDEA: XBRL DOCUMENT v3.19.1
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Significant Accounting Policies [Line Items]      
Right of use leases $ 212,909 $ 232,000  
Total operating lease liabilities 223,039 $ 241,000  
Fair Value, Measurements, Recurring [Member]      
Significant Accounting Policies [Line Items]      
Cash and cash equivalents $ 3,500,000   $ 6,800,000