Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 1,052	$ 1,172
Accounts receivable, net	4,938	2,989
Receivables from related parties, net	615	369
Other current assets	5,815	3,112
Current assets of discontinued operations	0	2
Total current assets	12,420	7,644
Property, plant and equipment, net of accumulated depreciation of $204,101 and $206,495 at December 31, 2021, and March 31, 2022, respectively	116,028	106,389
Goodwill	6,728	6,728
Debt issuance costs, net	2,652	2,854
Operating lease assets	7,539	7,855
Intangible assets, net	4,088	5,088
Other noncurrent assets	735	340
Total assets	150,190	136,898
Current liabilities:
Accounts payable	2,627	2,105
Accounts payable to related parties	2,023	1,047
Accrued interest payable	293	250
Accrued property taxes payable	1,618	1,660
Accrued payroll	1,789	4,782
Current operating lease liability	1,383	1,418
Other current liabilities	4,074	1,711
Current liabilities of discontinued operations	0	240
Total current liabilities	18,225	20,020
Other long-term liabilities	289	228
Noncurrent operating lease liability	6,394	6,703
Long-term debt	115,000	98,000
Commitments and contingencies (Note 12)
Partners’ capital (deficit):
Common unitholders (41,550,681 and 41,856,847 units issued and outstanding at December 31, 2021, and March 31, 2022, respectively)	388,702	390,310
Preferred unitholders (34,406,683 units issued and outstanding at both dates)	248,729	248,729
General partner interest (1.6% interest with 1,225,409 general partner units outstanding at both dates)	(631,500)	(631,482)
Total partners’ capital	5,931	7,557
Total liabilities and partners’ capital	150,190	136,898
Third Party [Member]
Current liabilities:
Unearned revenue	2,799	1,932
Related Party [Member]
Current liabilities:
Unearned revenue	1,619	4,875
Long-term unearned revenue with related parties	$ 4,351	$ 4,390