Fair Value Measurements - Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Assets
Total assets at fair value	$ 1,916,455	$ 1,761,363
Marketable Equity Securities
Assets
Total assets at fair value	1,916,451	1,761,312
Interest Rate Cap
Assets
Total assets at fair value	4	51
Level 1
Assets
Total assets at fair value	1,916,451	1,761,312
Level 1 | Marketable Equity Securities
Assets
Total assets at fair value	1,916,451	1,761,312
Level 2
Assets
Total assets at fair value	4	51
Level 2 | Interest Rate Cap
Assets
Total assets at fair value	$ 4	$ 51