Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Additional Information (Detail)

v3.3.1.900
Fair Value Measurements - Additional Information (Detail) - USD ($)
9 Months Ended
Oct. 31, 2015
Jan. 31, 2015
Fair Value Measurements Disclosure [Line Items]    
Maximum maturity of marketable securities Three months or less  
Escrow agreement fund $ 2,500,000  
Escrow reserve   $ 1,100,000
Acquisition date Feb. 02, 2015  
Cash equivalents and marketable securities $ 70,800,000 $ 105,400,000
Timeline Labs [Member]    
Fair Value Measurements Disclosure [Line Items]    
Current portion of contingent consideration liability 1,200,000  
Noncurrent portion of contingent consideration liability $ 800,000