Revenue Contract Asset and Contract Liabilities balances (Details) - Short-term Contract with Customer [Member] - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2020	Jan. 31, 2020
Capitalized Contract Cost [Line Items]
Contract Assets	$ 3,310	$ 7,525
Change Contract Assets	$ (4,215)
Increase (decrease) in contract assets with customers, percentage	(56.00%)
Contract Liabilities	$ 3,206	$ 2,288
Change in contract liabilities	$ 918
Increase (decrease) in contract liabilities with customers, percentage	40.10%

Increase (decrease) in contract assets with customers, percentage

No definition available.

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- Definition

Increase (decrease) in contract liabilities with customers, percentage

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in measure of progress which increases (decreases) right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045

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- Definition

Amount, before allowance for credit loss, of right to consideration in exchange for good or service transferred to customer, when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130533-203044

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- Definition

Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in measure of progress which (increases) decreases obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

+ Details

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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