Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Significant Accounting Policies - Summary of Cash, Cash Equivalents, and Restricted Cash Total (Detail) - USD ($)
$ in Thousands
Oct. 31, 2018
Jan. 31, 2018
Oct. 31, 2017
Jan. 31, 2017
Accounting Policies [Abstract]        
Cash and cash equivalents $ 21,554 $ 43,652 $ 27,155  
Restricted cash 543 9 8  
Total cash, cash equivalents, and restricted cash $ 22,097 $ 43,661 $ 27,163 $ 28,411