Fair Value Measurements (Details 1) - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Assets held for sale	$ 5,703,000		$ 5,800,000
Total losses	1,568,400	$ 0
Level 1
Assets held for sale	0		0
Level 2
Assets held for sale	0		0
Level 3
Assets held for sale	$ 5,703,000		$ 5,800,000