Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
CURRENT ASSETS
Cash and equivalents	$ 9,238,704	$ 10,249,207
Investments	22,403,839	20,372,652
Production accounts receivable	1,184,063	815,419
Other	51,095	79,950
Total current assets	32,877,701	31,517,228
PROPERTY AND EQUIPMENT
Proved properties (successful efforts accounting method)	139,217,861	142,912,812
Pipeline and support equipment	731,040	719,988
Corporate and other	2,097,229	2,093,989
Gross property and equipment	142,046,130	145,726,789
Less accumulated depreciation, depletion, amortization and write down	135,034,497	138,424,885
Net property and equipment	7,011,633	7,301,904
OTHER ASSETS	128,247	131,863
TOTAL ASSETS	40,017,581	38,950,995
CURRENT LIABILITIES
Accounts payable	2,113,238	2,470,720
Accrued expenses	621,866	1,575,935
Total current liabilities	2,735,104	4,046,655
DEFERRED INCOME TAXES	27,900	27,900
OPERATIONAL ADVANCES	2,813,720	2,653,099
ASSET RETIREMENT OBLIGATIONS	14,608,038	14,564,400
COMMITMENTS AND CONTINGENCIES
LIMITED PARTNERS' EQUITY, SUBJECT TO REPURCHASE RIGHT
Authorized - 8,000,000 Units Issued and outstanding - 5,334,473 and 5,441,928 Units, respectively	19,586,457	17,442,684
GENERAL PARTNER'S EQUITY	246,362	216,257
Total partners' equity	19,832,819	17,658,941
TOTAL LIABILITIES AND PARTNERS' EQUITY	$ 40,017,581	$ 38,950,995