Equity Method Investment (Details) - eREX Spark ¥ in Millions, $ in Millions		12 Months Ended
Oct. 31, 2019 JPY (¥)	Oct. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) director	Nov. 30, 2019 USD ($)
Schedule of Equity Method Investments [Line Items]
Payments to acquire equity method investment	¥ 156.4	$ 1.4
Ownership percentage	20.00%	20.00%	20.00%	20.00%
Dividends distributed percentage			30.00%
Number of years dividend is paid thereafter			4 years
Number of directors \| director			4
Number of directors appointed by the company \| director			1
Equity method investment \| $				$ 8.4
Gian on disposal of investment \| $			$ 4.9
Board of director members' percentage			25.00%

Equity Method Investment, Board of Director Members, Percentage

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Equity Method Investment, Dividends or Distributions, Entitled Period

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Number of Board of Directors

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Number of Board of Directors Appointed by the Company

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Proceeds from Equity Method Investment, Dividends or Distributions, Percentage

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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- Definition

Amount of gain (loss) on sale or disposal of an equity method investment.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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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.

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