Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.19.3
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
9 Months Ended
Jan. 02, 2019
Sep. 30, 2019
Jan. 01, 2019
Accounting Policies [Line Items]      
Operating lease, right-of-use asset   $ 400,000  
Operating lease liabilities   491,000  
ASU 2016-02      
Accounting Policies [Line Items]      
Operating lease, right-of-use asset   800,000 $ 800,000
Operating lease right of use asset after adjustment for deferred rent   200,000  
Operating lease liabilities   1,000,000 $ 1,000,000
Cumulative effect adjustment to retained earnings $ 0 $ 0