Fair Value Measurements - Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Assets
Total assets at fair value	$ 1,572,496	$ 1,552,090
Interest Rate Cap
Assets
Total assets at fair value	4,889
Level 1
Assets
Total assets at fair value	1,567,607	1,552,090
Level 2
Assets
Total assets at fair value	4,889
Level 2 | Interest Rate Cap
Assets
Total assets at fair value	4,889
Marketable Equity Securities
Assets
Total assets at fair value	1,567,607	1,552,090
Marketable Equity Securities | Level 1
Assets
Total assets at fair value	$ 1,567,607	$ 1,552,090