XML 97 R87.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Jan. 31, 2024
Jan. 31, 2023
Jan. 31, 2022
Jan. 31, 2021
Effective tax rate for income from continuing operation 22.70% 22.00% 8.60%  
Valuation allowance $ 2,534,000 $ 2,120,000    
Recognized (benefit) expense related to interest and penalties 71,000 49,000    
Accrued potential interest and penalties 46,000      
Deferred Tax Assets Operating loss carryforwards 199,000 135,000    
Deferred tax assets tax credit carryforwards research 2,160,000 1,851,000    
Foreign Tax Credit 154,000 154,000    
Deemed repatriated earnings 10,000,000      
Recognized tax benefits excluding interest and penalties 505,000 414,000 $ 303,000 $ 384,000
Unrecognized tax benefits as a result of the expiration of the statute of limitations 71,000 $ 49,000 $ 211,000  
Additional Foreign Tax Credit [Member]        
Foreign Tax Credit $ 200,000      
Tax Credits Carry Forwards [Member]        
Deferred tax assets operating loss carryforwards expiration period 2025 through 2031      
Deferred tax assets tax credit carryforwards research $ 2,200,000      
CHINA        
Deferred Tax Assets Operating loss carryforwards $ 200,000      
Deferred tax assets operating loss carryforwards expiration period 2024 through 2028      
Federal Tax [Member]        
Recognized tax benefits excluding interest and penalties $ 33,000      
Unrecognized tax benefits as a result of the expiration of the statute of limitations $ 39,000