Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.21.2
Subsequent Events (Details)
May 13, 2021
shares
Jul. 01, 2021
shares
Jun. 21, 2021
ft²
Jun. 07, 2021
ft²
Jun. 04, 2021
$ / shares
shares
May 31, 2021
$ / shares
Aug. 31, 2020
$ / shares
Subsequent Event [Line Items]              
Common stock par value | $ / shares         $ 0.0001 $ 0.0001 $ 0.0001
Minimum              
Subsequent Event [Line Items]              
Number of shares of common stock issuable under the Company's 2017 Stock Option/Stock Issuance Plan   250,000          
Private Placement | May 2021 Prefunded Warrants              
Subsequent Event [Line Items]              
Warrants issued 2,628,453            
Subsequent Event | Plan              
Subsequent Event [Line Items]              
Number of shares of common stock issuable under the Company's 2017 Stock Option/Stock Issuance Plan         3,000,000    
Common stock par value | $ / shares         $ 0.0001    
Subsequent Event | Lease agreement with Verifone Inc. to sublease              
Subsequent Event [Line Items]              
Square feet of office space under sublease | ft²       8,000      
Lease term       3 years      
Subsequent Event | Lease agreement to lease premises              
Subsequent Event [Line Items]              
Square feet of office space under sublease | ft²     13,418        
Lease term     77 months