Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash and equivalents	$ 11,757,057	$ 12,566,868
Investments	20,107,580	17,064,136
Production accounts receivable	1,208,634	1,661,669
Other	8,150	64,681
Total current assets	33,081,421	31,357,354
PROPERTY AND EQUIPMENT
Proved properties (successful efforts accounting method)	174,633,910	175,062,777
Pipeline and support equipment	791,756	762,440
Corporate and other	2,090,250	2,094,423
Gross property and equipment	177,515,916	177,919,640
Less accumulated depreciation, depletion, amortization and write down	168,720,741	168,754,778
Net property and equipment	8,795,175	9,164,862
OTHER ASSETS	131,624	125,796
TOTAL ASSETS	42,008,220	40,648,012
CURRENT LIABILITIES
Accounts payable	2,136,590	1,869,885
Accrued expenses	1,425,492	1,084,347
Total current liabilities	3,562,082	2,954,232
DEFERRED INCOME TAXES	45,700	40,700
OPERATIONAL ADVANCES	2,463,685	2,135,632
ASSET RETIREMENT OBLIGATIONS	16,640,632	16,807,486
COMMITMENTS AND CONTINGENCIES
LIMITED PARTNERS' EQUITY, SUBJECT TO REPURCHASE RIGHT
Authorized - 8,000,000 Units Issued and outstanding - 5,492,967 and 5,549,355 Units, respectively	19,063,258	18,486,440
GENERAL PARTNER'S EQUITY	232,863	223,522
Total partners' equity	19,296,121	18,709,962
TOTAL LIABILITIES AND PARTNERS' EQUITY	$ 42,008,220	$ 40,648,012