v3.26.1
Stock-Based Compensation and Employee Stock Purchase Program - Additional Information (Detail)
 3 Months Ended 6 Months Ended
Jun. 25, 2024
shares
May 20, 2015
shares
May 14, 2015
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
IncentivePlan
shares
Jun. 30, 2025
USD ($)
Dec. 31, 2025
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of equity incentive plans | IncentivePlan           2    
Total number of options outstanding       173,901   173,901   179,963
Unrecognized compensation cost related to unvested stock-based compensation grants | $       $ 82,000   $ 82,000    
Weighted-average remaining recognition period           1 year 2 months 12 days    
Stock-based compensation | $       14,000 $ 86,000 $ 29,000 $ 164,000  
2015 Employee Stock Purchase Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation | $       $ 0 $ 4,000 $ 0 $ 7,000  
Percentage in payroll deductions to acquire shares of common stock     15.00%          
Purchase plan offering period     6 months          
Employees are able to purchase company's common stock on first trading day of offering period, percentage     85.00%          
Issuance of common stock pursuant to employee stock purchase plan           10,560    
First offering period, start date     May 14, 2015          
First offering period, end date     Feb. 01, 2016          
Inducement Stock Option [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Total number of options outstanding       0   0   199
2015 Omnibus Equity Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Terms under the plan           The 2015 Plan became effective upon the Company’s IPO in May 2015 and all shares that were reserved, but not issued, under the 2006 Plan were assumed by the 2015 Plan. Upon effectiveness, the 2015 Plan had 3,860 shares of common stock reserved for future issuance, which included 259 that were transferred to and assumed by the 2015 Plan. The 2015 Plan provided for automatic annual increases in shares available for grant. In addition, shares subject to awards under the 2006 Plan that are forfeited or canceled were added to the 2015 Plan.    
Total number of shares reserved for issuance under plan   3,860            
Number of shares awarded o individual employee 50,000 9,375            
Options vesting period   4 years            
Additional shares authorized for issuance under the plan 200,000              
Total number of options outstanding       173,901   173,901   179,755
2015 Omnibus Equity Incentive Plan [Member] | Maximum [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Options exercisable period   10 years            
2006 Stock Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Total number of shares reserved for issuance under plan   259            
Total number of options outstanding               9