Real Estate Acquisitions (Details)		3 Months Ended				6 Months Ended
		Jun. 30, 2020 USD ($) properties		Mar. 31, 2020 USD ($) properties	[3],[4],[5]	Jun. 30, 2020 USD ($) properties
Total purchase price	[1]	$ 10,608,114	[2]	$ 30,525,974		$ 41,134,088
Number of Properties | properties		19	[2]	83		102	[2]
Land [Member]
Total purchase price		$ 2,555,428	[2]	$ 4,825,507		$ 7,380,935
Building and Improvements [Member]
Total purchase price		7,344,021	[2]	24,572,597		31,916,618
Tenant Improvements [Member]
Total purchase price		54,894	[2]	293,726		348,620
In-place lease intangibles [Member]
Total purchase price		692,705	[2]	2,477,174		3,169,879
Above-market leases [Member]
Total purchase price			[2]	7,148		7,148
Below Market Leases [Member]
Total purchase price		(38,934)	[2]	(1,616,080)		(1,655,014)
Other [Member]
Total purchase price	[6]			$ (34,098)		$ (34,098)

[1] Includes acquisition costs of $0.3 million for the three months ended March 31, 2020 and $0.2 million for the three months ended June 30, 2020.

[2] Includes the acquisition of a 13-building portfolio leased to the USPS in various states for approximately $7.2 million, including closing costs. In addition, the Company purchased six postal properties in individual or smaller portfolio transactions for approximately $3.4 million, including closing costs.

[3] Includes the acquisition of 20 postal properties in individual or smaller portfolio transactions for approximately $8.1 million, including closing costs.

[4] Includes the acquisition of a 21-building portfolio leased to the USPS. The contract purchase price for the portfolio was $13.8 million, exclusive of closing costs, and giving effect to 483,333 OP Units issued to the sellers at a value of $17.00 per unit. The closing price of the Company's common stock on January 10, 2020 was $16.39; therefore, total consideration at closing, including closing costs, was approximately $13.6 million of which $7.9 million represented the non-cash consideration (the value of the OP Units) issued to the sellers.

[5] Includes the acquisition of a 42-building portfolio leased to the USPS. The aggregate purchase price of such portfolio was approximately $8.8 million, including closing costs, which was funded with borrowings under our Credit Facility.

[6] Includes an intangible liability related to unfavorable operating leases on three properties that is included in "Accounts Payable, accrued expenses and other" on the Company's Consolidated Balance Sheets.