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Revenue (Details Textual)	6 Months Ended
	Jul. 31, 2018 USD ($)
Disaggregation Of Revenue [Line Items]
Cumulative effect on retained earnings	$ 724,000
ASU 2014-09
Disaggregation Of Revenue [Line Items]
Cumulative effect on retained earnings	$ 700,000
Revenue recognition, cloud service and app update estimated period	2 years
Contract costs to obtain or fulfill	$ 0
Practical expedients and exemptions, financing component [true/false]	true

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Amount, before accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

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Amount of the cumulative effect on retained earnings net of related income tax effect.

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Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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