Quarterly report pursuant to Section 13 or 15(d)

Operating Leases - Schedule of Components of Lease Expense (Detail)

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Operating Leases - Schedule of Components of Lease Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2019
Leases [Abstract]    
Operating lease cost $ 199 $ 611
Short term lease cost 3 17
Total lease cost $ 202 $ 628