Income Taxes (Significant components of the Company's deferred tax liabilities and assets) (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Deferred tax liabilities:
Property and equipment	$ 4,218,000	$ 4,242,000
Intangible assets	22,355,000	21,425,000
Prepaid expenses	477,000	405,000
Total deferred tax liabilities	27,050,000	26,072,000
Deferred tax assets:
Allowance for doubtful accounts	56,000	43,000
Compensation	1,134,000	1,093,000
Other accrued liabilities	123,000	134,000
Deferred Tax Assets, Gross, Total	1,313,000	1,270,000
Less: valuation allowance	0	0
Total net deferred tax assets	1,313,000	1,270,000
Net deferred tax liabilities	25,737,000	24,802,000
Current portion of deferred tax assets	341,000	361,000
Non-current portion of deferred tax liabilities	(26,078,000)	(25,163,000)
Net deferred tax liabilities	$ (25,737,000)	$ (24,802,000)