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STOCKHOLDERS' DEFICIT - New Charter (Narrative) (Details) - $ / shares	Dec. 31, 2017	Jan. 26, 2017	Dec. 31, 2016
Class D Common Stock
Class of Stock [Line Items]
Shares authorized under New Charter (in shares)	200,000,000	200,000,000	200,000,000
Par value of shares authorized under New Charter (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Preferred Stock
Class of Stock [Line Items]
Preferred stock authorized under New Charter (in shares)		150,000,000
Par value of preferred stock authorized under New Charter (in dollars per share)		$ 0.001

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-Publisher FASB
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