v3.26.1
Share-based compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Nov. 30, 2019
Mar. 31, 2026
Mar. 31, 2025
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Proceeds from Issuance of Private Placement   $ 0 $ 635
Unrecognized compensation cost   $ 300  
Estimated recognition weighted-average amortization period   1 year 9 months 18 days  
Aggregate intrinsic value of options outstanding   $ 200  
Aggregate intrinsic value of options exercisable   $ 100  
Weighted-average grant-date fair values of options granted   $ 0 $ 0.03
Expected dividend yield   0.00% 0.00%
2019 Incentive Award Plan | Common Stock [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common stock reserved for future issuance 1,948,970    
Number of shares of common stock initially available for issuance 1,948,970    
Percentage of shares of common stock outstanding 4.00%    
Shares available for issuance   3,018,496  
2019 Incentive Award Plan | Common Stock [Member] | Maximum Member      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Number of shares issued under the plan   14,130,029  
Shares available for issuance   5,888,150  
2019 Employee Stock Purchase Plan | Common Stock [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Percentage of shares of common stock outstanding 1.00%    
Number of shares available for issuance 243,621    
Shares available for issuance   3,344,353  
2019 Employee Stock Purchase Plan | Common Stock [Member] | Maximum Member      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Number of shares issued under the plan 3,288,886    
2012 Equity Incentive Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Convertible Preferred Stock, Shares Issued upon Conversion   572,458  
Number of shares available for issuance   1,500,000  
2023 Employment Inducement Award Plan [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Vesting period   4 years  
Term of award   10 years  
2023 Employment Inducement Award Plan [Member] | April 28, 2023 [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Common stock reserved for future issuance   1,500,000  
Number of shares of common stock initially available for issuance   1,500,000  
Two Thousand Nineteen Employee Stock Purchase Plan [Member] | Common Stock [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares available for issuance   754,624