Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Additional Information (Detail)

v3.3.1.900
Fair Value Measurements - Additional Information (Detail) - USD ($)
3 Months Ended 12 Months Ended
Jan. 31, 2016
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2014
Feb. 28, 2015
Fair Value Measurements Disclosure [Line Items]          
Loss on impairment $ 21,500,000 $ 21,464,000      
Goodwill impairment charge 0 15,787,000      
Contingent consideration liability, fair value 0 $ 0     $ 3,200,000
Maximum maturity of marketable securities   Three months or less      
Other than temporary declines in investments   $ 0 $ 0 $ 0  
Cash equivalents and marketable securities 71,100,000 71,100,000 105,400,000    
Escrow agreement fund 2,500,000 $ 2,500,000      
Escrow reserve     $ 1,100,000    
Acquisition date   Feb. 02, 2015      
Timeline Labs [Member]          
Fair Value Measurements Disclosure [Line Items]          
Loss on impairment   $ 21,900,000      
Goodwill impairment charge   15,800,000      
Intangible assets impairment charge   5,200,000      
Capitalized internal use software impairment charge   900,000      
Loss on impairment due to reversal of contingent consideration liability   400,000      
Contingent consideration liability, fair value $ 0 $ 0