STOCKHOLDERS' DEFICIT - PREFERRED STOCK (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
Oct. 31, 2017	Sep. 30, 2017
Class of Stock [Line Items]
Dividends preferred stock		$ 0.2
Subsequent Event \| Class A common stock
Class of Stock [Line Items]
Preferred stock dividends (shares)	60,133

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No definition available.

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- Definition

Aggregate amount of cumulative preferred dividends in arrears.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21488-112644

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- Definition

Number of shares of preferred stock issued as dividends during the period. Excludes stock splits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

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