Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,172	$ 805
Accounts receivable, net	2,989	3,297
Receivables from related parties, net	369	507
Other current assets	3,112	2,355
Current assets of discontinued operations	2	96,945
Total current assets	7,644	103,909
Property, plant and equipment, net of accumulated depreciation of $197,561 and $204,101 at December 31, 2020 and 2021, respectively	106,389	104,709
Goodwill	6,728	6,728
Debt issuance costs, net	2,854	1,340
Operating lease assets	7,855	8,548
Intangible assets, net	5,088	7,531
Other noncurrent assets	340	252
Total assets	136,898	233,017
Current liabilities:
Accounts payable	2,105	1,635
Accounts payable to related parties	1,047	31
Accrued interest payable	250	274
Accrued property taxes payable	1,660	1,757
Accrued payroll	4,782	4,977
Current operating lease liability	1,418	1,684
Other current liabilities	1,711	1,349
Current liabilities of discontinued operations	240	17,248
Total current liabilities	20,020	35,347
Other long-term liabilities	228	168
Noncurrent operating lease liability	6,703	6,980
Long-term debt	98,000	252,592
Commitments and contingencies (Note 15)
Partners’ capital (deficit):
Common unitholders (41,214,856 and 41,550,681 units issued and outstanding at December 31, 2020 and 2021, respectively)	390,310	312,591
Preferred unitholders (35,125,202 and 34,406,683 units issued and outstanding at December 31, 2020 and 2021, respectively)	248,729	253,923
General partner interest (1.6% interest with 1,225,409 general partner units outstanding at both dates)	(631,482)	(632,737)
Total partners’ capital (deficit)	7,557	(66,223)
Total liabilities and partners’ capital (deficit)	136,898	233,017
Third Party [Member]
Current liabilities:
Unearned revenue	1,932	1,789
Related Party [Member]
Current liabilities:
Unearned revenue	4,875	4,603
Long-term unearned revenue with related parties	$ 4,390	$ 4,153