Asset impairment and other - Schedule of Facility Consolidation and Asset Impairment Charges (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unusual or Infrequent Items, or Both [Abstract]
Contractual termination		$ 1,097,000	$ 0	$ 0
Programming rights impairment	$ 3,400,000	0	3,359,000	0
Reimbursement of spectrum repacking		0	0	(323,000)
Total asset impairment and other		$ 1,097,000	$ 3,359,000	$ (323,000)