Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.19.2
Subsequent Events - Additional Information (Detail)
3 Months Ended
Aug. 09, 2019
Director
shares
May 31, 2017
USD ($)
Oct. 31, 2019
USD ($)
Jul. 15, 2019
Jul. 01, 2019
Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] | RSU Rescission Agreements [Member]          
Subsequent Event [Line Items]          
Number of directors entered into agreements | Director 3        
Number of shares rescinded and returned | shares 38,666        
San Jose, California [Member] | Subsequent Event [Member]          
Subsequent Event [Line Items]          
Operating lease, renewal term         3 years
San Jose, California [Member] | Scenario Forecast [Member]          
Subsequent Event [Line Items]          
Operating leases, rent expense     $ 52,970    
San Jose, California [Member] | Maximum [Member] | Scenario Forecast [Member]          
Subsequent Event [Line Items]          
Maximum monthly lease payment     64,941    
Costa Mesa, California [Member]          
Subsequent Event [Line Items]          
Operating leases, rent expense   $ 9,040      
Costa Mesa, California [Member] | Subsequent Event [Member]          
Subsequent Event [Line Items]          
Operating lease, renewal term       2 years  
Costa Mesa, California [Member] | Scenario Forecast [Member]          
Subsequent Event [Line Items]          
Operating leases, rent expense     9,773    
Costa Mesa, California [Member] | Maximum [Member] | Scenario Forecast [Member]          
Subsequent Event [Line Items]          
Maximum monthly lease payment     $ 10,200