Property and Equipment, Net - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Property Plant And Equipment [Abstract]
Depreciation and amortization expense excluding software development costs	$ 438,000	$ 205,000	$ 1,200,000	$ 581,000
Amortization expense related to software development costs	$ 1,100,000	$ 753,000	$ 2,400,000	$ 2,400,000