Derivative Financial Instruments - Summary of Terms of Partnership's Total Return Swaps (Details) - USD ($)		3 Months Ended	12 Months Ended
		Mar. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative, Notional Amount		$ 103,400,000
Derivative, Fair Value Liability		$ 292,048	$ 293,626
Mizuho Capital Markets 1 [Member]
Derivative [Line Items]
Derivative, Purchase Date		2020-09	2020-09
Derivative, Notional Amount		$ 39,881,661	$ 39,970,485
Derivative, Effective Date		2020-09	2020-09
Derivative, Termination Date		2025-09	2025-09
Derivative, Period End Variable Rate Paid	[1]	4.25%	4.25%
Derivative, Period End Variable Rate Received	[2]	9.18%	9.22%
Derivative, Variable Rate Index		3-month LIBOR	3-month LIBOR
Derivative, Fair Value Liability		$ 77,280	$ 77,995
Mizuho Capital Markets 2 [Member]
Derivative [Line Items]
Derivative, Purchase Date		2020-09	2020-09
Derivative, Notional Amount		$ 63,500,000	$ 63,500,000
Derivative, Effective Date		2020-09	2020-09
Derivative, Termination Date		2022-03	2022-03
Derivative, Period End Variable Rate Paid	[3]	1.00%	1.00%
Derivative, Period End Variable Rate Received	[2]	9.18%	9.22%
Derivative, Variable Rate Index		3-month LIBOR	3-month LIBOR
Derivative, Fair Value Liability		$ 214,768	$ 215,631

[1] ^{Variable rate equal to 3-month LIBOR + 3.75%, subject to a floor of 4.25%.}

[2] ^{Variable rate equal to 3-month LIBOR + 9.00%.}

[3] ^{Variable rate equal to 3-month LIBOR + 0.50%, subject to a floor of 1.00%.}