UNAUDITED CONSOLIDATED STATEMENT OF STOCKHOLDERS' DEFICIENCY (Parenthetical) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Tax withholdings related to net share settlements of restricted stock units and awards	$ 6,400	$ 0	$ 1,600,000	$ 1,600,000
Treasury Stock
Shares withheld for withholding taxes (in shares)	756	0	127,725	85,607
Restricted Stock and Restricted Stock Units \| Treasury Stock \| Class A Common Stock
Share repurchase price (in usd per share)	$ 8.50	$ 0	$ 12.99	$ 18.86

Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
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