Revenue Contract Asset and Contract Liabilities balances (Details) - Short-term Contract with Customer [Member] - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2019	Jan. 31, 2019
Capitalized Contract Cost [Line Items]
Contract with Customer, Asset, Gross	$ 6,669	$ 2,027
Increase (Decrease) in Contract Assets	$ 4,642
Increase (decrease) in contract assets with customers, percentage	229.00%
Contract with Customer, Liability, Current	$ 2,839	$ 1,303
Increase (Decrease) in Contract Liabilities	$ 1,536
Increase (decrease) in contract liabilities with customers, percentage	117.90%

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.

+ Details

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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.

+ Details

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Section 50
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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130533-203044

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

+ Details

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- Definition

The increase (decrease) during the reporting period in the liability reflecting cash payments received before the related costs have been incurred.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

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Balance Type:	debit
Period Type:	duration

- Definition

Amount of increase (decrease) in the asset reflecting the cost incurred on uncompleted contracts in excess of related billings.

+ References

+ Details

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