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Recently Issued Accounting Pronouncements - Additional Information (Detail) - Accounting Standards Update 2016-02 [Member]
Jan. 01, 2019
USD ($)
Minimum [Member]  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Right-of-use asset $ 60,000
Lease liability 60,000
Maximum [Member]  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Right-of-use asset 65,000
Lease liability $ 65,000