Schedule II - Valuation and Qualifying Accounts (Details) - Allowance for doubtful accounts: - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 2,565,000	$ 4,971,000
Charged to costs and expense	(711,000)	539,000
Deductions from reserves	(1,385,000)	(2,945,000)
Balance at end of year	$ 469,000	$ 2,565,000