Issuances of Beneficial Unit Certificates (Details) - At The Market Offering [Member] - BUCs - Restricted and Unrestricted [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Aug. 31, 2018
Issuances of Beneficial Unit Certificates [Line Items]
Partnership capital unit, amount authorised	$ 225,000,000		$ 75,000,000
Sale of Beneficial Unit Certificates, net of issuance costs, unit		310,519
Net proceeds from partnership capital unit sold		$ 1,800,000
Registration statement expiration date	2022-12