Income Tax Provision - Summary of Income Tax Expense (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Tax Provision [Line Items]
Total income tax expense (benefit)	$ 13,000	$ (63,000)	$ 6,000	$ 2,395,047
Greens Hold Co [Member]
Income Tax Provision [Line Items]
Current income tax expense (benefit)	13,000	138,000	(28,000)	2,760,047
Deferred income tax expense (benefit)		(201,000)	34,000	(365,000)
Total income tax expense (benefit)	$ 13,000	$ (63,000)	$ 6,000	$ 2,395,047