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Accumulated Other Comprehensive Loss - Changes in Balance of Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2018
Schedule of Capitalization, Equity [Line Items]      
Beginning Balance $ 69,775 $ 63,647 $ 70,537
Other Comprehensive Income (Loss) (275) (646) 884
Ending Balance 71,375 69,775 63,647
Foreign Currency Translation Adjustments [Member]      
Schedule of Capitalization, Equity [Line Items]      
Beginning Balance (852) (181) (1,048)
Other Comprehensive Loss Income (Loss) before reclassification (133) (671) 867
Other Comprehensive Income (Loss) (133) (671) 867
Ending Balance (985) (852) (181)
Unrealized Holding Gain/(Loss) on Available for Sale Securities [Member]      
Schedule of Capitalization, Equity [Line Items]      
Beginning Balance   (3) (8)
Other Comprehensive Loss Income (Loss) before reclassification     5
Amounts reclassified from AOCL to Earnings   3  
Other Comprehensive Income (Loss)   3 5
Ending Balance     (3)
Net Unrealized Gain/(Loss) on Cash Flow Hedges [Member]      
Schedule of Capitalization, Equity [Line Items]      
Beginning Balance 34 12  
Other Comprehensive Loss Income (Loss) before reclassification 122 622 (1,036)
Amounts reclassified from AOCL to Earnings (264) (600) 1,048
Other Comprehensive Income (Loss) (142) 22 12
Ending Balance (108) 34 12
Accumulated Other Comprehensive Income (Loss) [Member]      
Schedule of Capitalization, Equity [Line Items]      
Beginning Balance (818) (172) (1,056)
Other Comprehensive Loss Income (Loss) before reclassification (11) (49) (164)
Amounts reclassified from AOCL to Earnings (264) (597) 1,048
Other Comprehensive Income (Loss) (275) (646) 884
Ending Balance $ (1,093) $ (818) $ (172)