Share-Based Compensation - Options (Details) - Class A common shares - Stock options	3 Months Ended
Mar. 31, 2020 $ / shares shares
Number of Shares
Outstanding, beginning of the period \| shares	8,491,734
Granted \| shares	1,455,250
Exercised \| shares	(643,867)
Forfeited \| shares	(234,919)
Cancelled \| shares	(77,326)
Outstanding, end of the period \| shares	8,990,872
Options exercisable \| shares	3,176,450
Options unvested \| shares	5,814,422
Weighted Average Grant Date Fair Value
Outstanding, beginning of the period \| $ / shares	$ 7.68
Granted \| $ / shares	10.74
Exercised \| $ / shares	2.50
Forfeited \| $ / shares	10.89
Cancelled \| $ / shares	16.72
Outstanding, end of the period \| $ / shares	8.39
Options exercisable \| $ / shares	8.26
Options unvested \| $ / shares	$ 9.63

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.