Fair Value Measurements - Reconciliation of Level 3 Assets (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance at December 31, 2015	$ 0
Balance at December 31, 2016	0
Wholly Owned Subsidiaries
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance at December 31, 2015	34,624,573
Transfer out of level 3 effective change in status	(34,624,573)
Balance at December 31, 2016	$ 0