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Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Income Tax [Line Items]
Income tax benefit	$ 22,000	$ 69,000
Unrecognized tax benefits	4,800,000
Interest expense or penalties related to unrecognized tax benefits	0
Voxter Communications Inc.
Income Tax [Line Items]
Income tax benefit	$ 22,000	$ 69,000

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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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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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