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Summary of Significant Accounting Policies - Additional Information (Detail) - shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Property, Plant and Equipment [Line Items]    
Weighted average number of common shares outstanding 9,517,664 9,222,199
Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, estimated useful life 3 years  
Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Property and Equipment, estimated useful life 30 years