Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Additional Information (Detail)

v3.19.1
Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)
 3 Months Ended 12 Months Ended
Jan. 31, 2019
Jul. 31, 2018
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2017
Goodwill And Intangible Assets [Line Items]          
Impairment charge   $ 0 $ 15,502,000    
Other asset impairment charges   $ 0      
Goodwill before impairment charge $ 24,300,000   24,300,000    
Goodwill 8,753,000   8,753,000 $ 25,579,000 $ 23,287,000
Goodwill accumulated impairments losses 54,800,000   54,800,000 39,300,000  
Impairment charge 1,200,000        
Property, plant and equipment, carrying value 20,990,000   20,990,000 29,858,000  
Impairment charge 300,000   300,000    
Carrying value of intangible assets before the impairment charge 300,000   300,000    
Intangible assets, net 0   0 1,303,000  
Amortization expense     896,000 1,559,000  
Internally Developed Software [Member]          
Goodwill And Intangible Assets [Line Items]          
Net book value 0   0    
Cost of Service Revenue [Member]          
Goodwill And Intangible Assets [Line Items]          
Amortization expense     700,000 900,000  
Buildings [Member]          
Goodwill And Intangible Assets [Line Items]          
Impairment charge 1,200,000   1,200,000    
Property, plant and equipment before impairment, carrying value 4,700,000   4,700,000    
Property, plant and equipment, carrying value $ 3,467,000   $ 3,467,000 $ 11,839,000