Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Summary of Cash, Cash Equivalents, and Restricted Cash Total (Detail)

v3.8.0.1
Summary of Significant Accounting Policies - Summary of Cash, Cash Equivalents, and Restricted Cash Total (Detail) - USD ($)
$ in Thousands
Jan. 31, 2018
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Accounting Policies [Abstract]        
Cash and cash equivalents $ 43,652 $ 28,302 $ 58,733  
Restricted cash 9 109 82  
Total cash, cash equivalents, and restricted cash $ 43,661 $ 28,411 $ 58,815 $ 90,019