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Stockholders' Equity - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Jan. 01, 2022
May 31, 2022
Jul. 31, 2020
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Jan. 01, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of warrants sold   17,372,312            
Offering price of warrant   $ 1.5999            
Exercise price per warrant   $ 0.0001            
proceeds from issuance of common stock and pre-funded warrants   $ 42.9            
Placement agent fees and offering costs   $ 2.1            
Maximum ownership percentage of common stock shares for outstanding warrants to be exercised           4.99%    
Period after notice received by company maximum ownership percentage to be effective description           The revised Maximum Ownership Percentage would be effective 61 days after the notice is received by the Company    
Maximum ownership percentage of common stock shares for outstanding warrants to be exercised for certain holders           9.99%    
2016 Equity Incentive Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Maximum annual percentage increase 4.00%              
Additional number of shares available for issuance 1,974,205             1,918,363
Common stock available for future issuance       1,182,245   1,182,245    
2016 Equity Incentive Plan | Restricted Stock Units RSU                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Shares, granted to employees     228,200          
RSUs outstanding       150,000   150,000    
Total stock-based compensation expense           $ 1.2    
2016 Employee Stock Purchase Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Stock option to purchase an aggregate of common stock shares       87,087 44,957 151,827 82,965  
Aggregate cash proceeds from sale of shares         $ 0.2 $ 0.2 $ 0.4  
Maximum [Member]                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Maximum ownership percentage of common stock shares for outstanding warrants to be exercised           19.99%    
Maximum [Member] | 2016 Employee Stock Purchase Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Aggregate cash proceeds from sale of shares       $ 0.1        
Common Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of common stock shares issued   10,752,688            
Common stock offering price   $ 1.60