Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pekin Campus Production Segment [Member]
Segments (Details) [Line Items]
Management fees	$ 5,046,000	$ 4,344,000	$ 4,344,000
Capital expenditures	25,700	14,300
Marketing and Distribution Segment [Member]
Segments (Details) [Line Items]
Management fees	3,840,000	3,480,000	3,480,000
Other Production Segment [Member]
Segments (Details) [Line Items]
Management fees	2,400,000	1,950,000	$ 3,893,000
Capital expenditures	$ 12,300	$ 2,100