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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Summary of Significant Accounting Policies |
Activity in the allowance for doubtful accounts | A provision for doubtful accounts is recorded based on our judgment of the collectability of receivables. Amounts are written off when determined to be fully uncollectible. Delinquent accounts are based on contractual terms. The activity in the allowance for doubtful accounts during the years ended December 31, 2022, 2021 and 2020 was as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  |  | ​ |  |  | ​ |  |  | ​ |  | Write Off of |  |  | ​
​ | ​ | Balance | ​ | Charged to | ​ | Allowance | ​ | Uncollectible | ​ | Balance at
​ | ​ | at Beginning | ​ | Costs and | ​ | From | ​ | Accounts, Net of | ​ | End of
Year Ended |  | of Period |  | Expenses |  | Acquisitions |  | Recoveries |  | Period
​ | ​ | (in thousands)
December 31, 2022 | ​ | $ | 469 | ​ | $ | 408 | ​ | $ | — | ​ | $ | (358) | ​ | $ | 519
December 31, 2021 | ​ | $ | 648 | ​ | $ | 56 | ​ | $ | — | ​ | $ | (235) | ​ | $ | 469
December 31, 2020 | ​ | $ | 671 | ​ | $ | 420 | ​ | $ | — | ​ | $ | (443) | ​ | $ | 648
​
Property and equipment | ​ Property and equipment consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Estimated |  | December 31,
​ |  | Useful Life |  | 2022 |  | 2021
​ | ​ | (In thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Land and land improvements |  | ​ | — | ​ | $ | 15,259 | ​ | $ | 14,638
Buildings |  | ​ | 31.5 years | ​ |  | 40,823 | ​ |  | 38,225
Towers and antennae |  | ​ | 7-15 years | ​ |  | 26,992 | ​ |  | 25,918
Equipment |  | ​ | 3-15 years | ​ |  | 52,459 | ​ |  | 55,955
Furniture, fixtures and leasehold improvements |  | ​ | 7-20 years | ​ |  | 7,741 | ​ |  | 7,129
Vehicles |  | ​ | 5 years | ​ |  | 2,780 | ​ |  | 2,854
​ |  | ​ | ​ | ​ |  | 146,054 | ​ | ​ | 144,719
Accumulated depreciation |  | ​ | ​ | ​ |  | (92,856) | ​ |  | (91,375)
Net property and equipment | ​ | ​ | ​ | ​ | $ | 53,198 | ​ | $ | 53,344
​
Schedule of Computation of Basic and Diluted Earnings Per Share | The following table sets forth the computation of basic and diluted earnings per share: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ | ​
​ |  | Years Ended December 31,
​ |  | 2022 |  | 2021 |  | 2020
​ |  | (In thousands, except per share data)
Numerator: | ​ | ​ |  |  | ​ |  | ​ | ​ |
Net income | ​ | $ | 9,202 | ​ | $ | 11,157 | ​ | $ | (1,913)
Less: Income allocated to unvested participating securities | ​ |  | 140 | ​ |  | 190 | ​ | ​ | (21)
Net income available to common shareholders | ​ | $ | 9,062 | ​ | $ | 10,967 | ​ | $ | (1,892)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator: | ​ |  | ​ | ​ |  | ​ | ​ | ​ | ​
Denominator for basic earnings per share — weighted average shares | ​ |  | 5,973 | ​ |  | 5,917 | ​ | ​ | 5,871
Effect of dilutive securities: | ​ |  | ​ | ​ |  | ​ | ​ | ​ | ​
Common stock equivalents | ​ |  | — | ​ |  | — | ​ | ​ | —
Denominator for diluted earnings per share — adjusted weighted-average shares and assumed conversions | ​ |  | 5,973 | ​ |  | 5,917 | ​ | ​ | 5,871
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per share: | ​ |  | ​ | ​ |  | ​ | ​ | ​ | ​
Basic | ​ | $ | 1.52 | ​ | $ | 1.85 | ​ | $ | (0.32)
Diluted | ​ | $ | 1.52 | ​ | $ | 1.85 | ​ | $ | (0.32)
​

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