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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 340
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-Section 50
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Amortization period of cost capitalized in obtaining or fulfilling contract with customer, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
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Note 2 - Revenue 1 (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018	Jan. 31, 2019
Contract with Customer, Liability, Revenue Recognized			$ 82,800
Revenue, Remaining Performance Obligation, Amount	$ 250,500		250,500
Capitalized Contract Cost, Amortization			2,161	$ 2,051
Capitalized Contract Cost, Impairment Loss			$ 0
Direct Costs of Obtaining Contract [Member]
Capitalized Contract Cost, Amortization Period	5 years		5 years
Capitalized Contract Cost, Net, Total	$ 11,000		$ 11,000		$ 11,000
Capitalized Contract Cost, Amortization	900		1,900
Direct Costs of Obtaining Contract [Member] \| Selling and Marketing Expense [Member]
Capitalized Contract Cost, Amortization	$ 900		$ 1,800
Costs to Fulfill Contract [Member]
Capitalized Contract Cost, Amortization Period	5 years		5 years
Capitalized Contract Cost, Net, Total	$ 1,400		$ 1,400		$ 1,500
Costs to Fulfill Contract [Member] \| Cost of Sales [Member]
Capitalized Contract Cost, Amortization	$ 100	$ 100	$ 300	$ 300