Fair Value Measurements - Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Assets
Total assets at fair value	$ 1,922,827	$ 1,572,496
Marketable Equity Securities
Assets
Total assets at fair value	1,922,709	1,567,607
Interest Rate Cap Derivative
Assets
Total assets at fair value	118	4,889
Level 1
Assets
Total assets at fair value	1,922,709	1,567,607
Level 1 | Marketable Equity Securities
Assets
Total assets at fair value	1,922,709	1,567,607
Level 2
Assets
Total assets at fair value	118	4,889
Level 2 | Interest Rate Cap Derivative
Assets
Total assets at fair value	$ 118	$ 4,889