Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

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Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer.

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Amount, after 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 revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Note 2 - Revenue (Details Textual) - USD ($) $ in Thousands	3 Months Ended
Note 2 - Revenue (Details Textual) - USD ($) $ in Thousands	Apr. 30, 2018	Apr. 30, 2017	Jan. 31, 2018
Contract with Customer, Liability, Revenue Recognized	$ 50,200
Capitalized Contract Cost, Amortization	1,004
Capitalized Contract Cost, Impairment Loss	$ 0
Direct Costs of Obtaining Contract [Member]
Capitalized Contract Cost, Amortization Period	5 years
Capitalized Contract Cost, Net, Total	$ 10,700		$ 10,100
Direct Costs of Obtaining Contract [Member] \| Selling and Marketing Expense [Member]
Capitalized Contract Cost, Amortization	$ 900
Costs to Fulfill Contract [Member]
Capitalized Contract Cost, Amortization Period	5 years
Capitalized Contract Cost, Net, Total	$ 1,500		$ 1,500
Costs to Fulfill Contract [Member] \| Cost of Sales [Member]
Capitalized Contract Cost, Amortization	$ 100