Equity-Based Compensation (Details) - USD ($)		3 Months Ended		6 Months Ended
	Dec. 31, 2014	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Equity-based compensation
Equity-based compensation expense		$ 45,500	$ 42,300	$ 91,000	$ 84,490
Unrecognized equity-based compensation		$ 300,000		$ 300,000		$ 200,000
Restricted stock
Equity-based compensation
Restricted common shares grant vesting period	4 years			2 years
Unvested shares (in shares)		35,940.347970174		35,940.347970174		20,827
Independent Directors | Restricted stock
Equity-based compensation
Number of shares granted to independent directors (in shares)				121,977.293264292
Aggregate value for restricted common shares granted to independent directors		$ 1,100,000		$ 1,100,000