Warrants (Details) - Management Warrants - USD ($) $ / shares in Units, $ in Millions	Oct. 31, 2019	Dec. 31, 2017
Chief Executive Officer
Class of Warrant or Right [Line Items]
Number of shares called by warrants (in shares)		1,965,409
Total warrant price		$ 50.0
Exercise price (in dollars per share)	$ 124.64
President
Class of Warrant or Right [Line Items]
Number of shares called by warrants (in shares)		87,951
Total warrant price		$ 2.0
Exercise price (in dollars per share)	$ 117.01

The price of warrants or rights outstanding.

No definition available.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644

+ 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

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

+ Details

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- Details

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