Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Income Tax [Line Items]
Income tax expense (benefit)		$ (28,000)		$ (66,000)
Unrecognized tax benefits	$ 7,200,000		$ 7,200,000
Interest expense or penalties related to unrecognized tax benefits			0
Voxter Communications Inc
Income Tax [Line Items]
Income tax expense (benefit)	$ 0	$ (28,000)	$ 0	$ (66,000)