Amount assets recognized as of the acquisition date, intangible assets and goodwill.

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Restriction period on the re-sale of shares associated with a business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Business Combinations (Details) - USD ($) $ in Millions		3 Months Ended
Business Combinations (Details) - USD ($) $ in Millions	Mar. 19, 2019	Apr. 30, 2020	Apr. 30, 2019	Jan. 31, 2020
Business Combinations
Purchase price, net of cash acquired			$ 27.9
Goodwill		$ 0.0		$ 28.3
Goodwill		$ 0.0		$ 28.3
Tecton and Red Bone
Business Combinations
Total consideration	$ 74.6
Cash paid for acquisition	$ 27.6
Shares issued	416,667
Common stock value issued as consideration	$ 47.0
Goodwill	31.8
Excess of purchase price over the fair market value of identifiable assets.	51.2
Identifiable intangible assets	19.4
Goodwill	$ 31.8
Acquisitions revenues			3.1
Tecton and Red Bone \| Minimum
Business Combinations
Restriction period on re-sale of shares	6 months
Tecton and Red Bone \| Maximum
Business Combinations
Restriction period on re-sale of shares	24 months
Tecton
Business Combinations
Identified intangibles			6.2
Goodwill			15.0
Goodwill			15.0
Red Bone
Business Combinations
Identified intangibles			13.2
Goodwill			16.8
Goodwill			$ 16.8
Customer contracts and relationships
Business Combinations
Useful Life (years)		20 years
Customer contracts and relationships \| Tecton and Red Bone
Business Combinations
Useful Life (years)	20 years
Covenants not to compete \| Minimum
Business Combinations
Useful Life (years)		1 year 6 months
Covenants not to compete \| Maximum
Business Combinations
Useful Life (years)		3 years
Covenants not to compete \| Tecton and Red Bone \| Minimum
Business Combinations
Useful Life (years)	18 months
Covenants not to compete \| Tecton and Red Bone \| Maximum
Business Combinations
Useful Life (years)	3 years