Consolidated Balance Sheets (Parentheticals) - shares	Dec. 31, 2021	Dec. 31, 2020
Limited partner's equity, units authorized (in shares)	8,000,000	8,000,000
Limited partner's equity, units issued (in shares)	5,334,473	5,441,928
Limited partner's equity, units outstanding (in shares)	5,334,473	5,441,928