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FAIR VALUE MEASUREMENTS - Assumptions used in Monte Carlo simulation (Details)	Apr. 30, 2019 item
Estimated volatility rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of the contingent consideration	40
Risk-free rate of return
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of the contingent consideration	3.2
Simulation steps
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value of the contingent consideration	10,000

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- Definition

This information is pertaining to the input used to measure contingent consideration liability from business combination.

+ References

No definition available.

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- Definition

Value of input used to measure contingent consideration liability from business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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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.

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