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Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Income Tax [Line Items]
Income tax expense (benefit)		$ (16,000)		$ (38,000)
Unrecognized tax benefits	$ 6,800,000		$ 6,800,000
Interest expense or penalties related to unrecognized tax benefits			0
Voxter Communications Inc
Income Tax [Line Items]
Income tax expense (benefit)	$ 0	$ (16,000)	$ 0	$ (38,000)

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Income tax.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of unrecognized tax benefits.

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