v3.26.3
STOCKHOLDERS' EQUITY - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Jan. 01, 2026
Jan. 01, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2021
Dec. 31, 2025
Nov. 30, 2022
Class of Stock [Line Items]              
Common stock, shares authorized (in shares)     200,000,000     200,000,000  
Common stock, shares issued (in shares)     5,333,190     5,283,321  
Common stock, shares outstanding (in shares)     5,333,190     5,283,321  
Preferred stock, shares authorized (in shares)     50,000,000     50,000,000  
Preferred stock, shares outstanding (in shares)     0     0  
Outstanding stock options, aggregate intrinsic value     $ 2,438     $ 89  
Exercisable stock options, aggregate intrinsic value     $ 1,361        
Share price (per share)     $ 17.20        
Weighted average grant date fair value (in dollars per share)     $ 3.60 $ 4.96      
Unrecognized share-based compensation expense     $ 1,400        
Total unrecognized share-based compensation expense, weighted average period for recognition     1 year 7 months 6 days        
Restricted Stock Units (RSUs)              
Class of Stock [Line Items]              
Total unrecognized share-based compensation expense, weighted average period for recognition     1 year 7 months 6 days        
Unrecognized share-based compensation expense, restricted stock units     $ 200        
2021 Equity Incentive Plan              
Class of Stock [Line Items]              
Common stock issuable (in shares)     1,474,672   680,043    
Share pool increase, percentage of common shares outstanding         5.00%    
Additional shares authorized (in shares) 264,166 259,438          
Shares available for future issuance (in shares)     846,367        
2021 Employee Stock Purchase Plan              
Class of Stock [Line Items]              
Common stock issuable (in shares)         36,415    
Share pool increase, percentage of common shares outstanding         1.00%    
Additional shares authorized (in shares) 0 0          
Shares available for future issuance (in shares)     91,479        
Common stock shares outstanding (in shares)     72,831        
Shares issued during period (in shares)     2,802 4,375      
Share-based compensation arrangement by share-based payment award, purchase price of common stock (as a percent)     85.00%        
Follow on Offering | Pre-Funded Warrants              
Class of Stock [Line Items]              
Number of securities called by warrants or rights (in shares)     416,673 416,673     416,673
Offering price (in dollars per share)             $ 47.9992
Pre-funded warrants exercise price (in dollars per share)             $ 0.0008
Percent excess limit (as a percent)     9.99%        
Days of notice     61 days        
Percentage of common stock beneficially owned not exceed (as a percent)     19.99%