Future Principal Payment Requirements on Outstanding Debt (Detail) - USD ($)		Sep. 30, 2018	Dec. 31, 2017
Debt, Fiscal Year Maturity
2018	[1]	$ 122,872,859
2019	[1]	26,139,333
2020	[1]	12,622,834
2021	[1]	13,684,085
2022		3,635,428
2023 and thereafter		217,722,414
Total payments		396,676,953
Debt issuance costs, net		(194,957)	$ (836,202)
Total		395,909,178	396,792,902
Fixed Rate Secured Debt
Debt, Fiscal Year Maturity
Premium on secured debt, net		1,305,598	1,646,988
Debt issuance costs, net		(2,073,373)	$ (2,361,850)
Total		$ 395,909,178

[1] On October 11, 2018, we repaid approximately $70.7 million of our Canadian debt with the proceeds from a new loan with Citibank. On October 29, 2018, we amended our Amended KeyBank Credit Facility to extend the maturity date until February 20, 2019. Subsequent to these debt transactions, future principal payment requirements on our outstanding debt for the years ending December 31, 2018, 2019, 2020, 2021, 2022, and thereafter are approximately $0.2 million, $90.1 million, $83.1 million, $2.0 million, $3.6 million, and $217.7 million, respectively.