Revenue Recognition - Additional Information (Detail) - USD ($)	9 Months Ended
	Oct. 31, 2020	Jan. 31, 2020
Disaggregation of Revenue [Abstract]
Contract liabilities and extended warranties	$ 313,000	$ 466,000
Revenue recognized	466,000
Contract assets balance	841,000	$ 944,000
Amortization of incremental direct costs	44,000
Deferred incremental direct contract costs reported in other current assets	59,000
Deferred incremental direct costs net of accumulated amortization	$ 900,000
Capitalized Contract Costs Benefitial Term	6 years