Consolidated Balance Sheets (Parentheticals) - shares	Dec. 31, 2019	Dec. 31, 2018
Limited partner's equity, units authorized (in shares)	8,000,000	8,000,000
Limited partner's equity, units issued (in shares)	5,492,967	5,549,355
Limited partner's equity, units outstanding (in shares)	5,492,967	5,549,355