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Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jul. 06, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Amortization expense |  | $ 200 | $ 200 | $ 400 | $ 600 |
Proceeds from the sale of FCC spectrum licenses |  |  |  | $ 17,300 | $ 0 |
Spectrum Purchase Agreements | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Sale proceeds | $ 21,100 |  |  |  |  |
Proceeds from the sale of FCC spectrum licenses | 17,300 |  |  |  |  |
Discontinued operation, liabilities assumed by acquirer | 3,800 |  |  |  |  |
Gain on sale | $ 1,300 |  |  |  |  |
Spectrum Purchase Agreements | Disposal Group, Held-for-sale, Not Discontinued Operations |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Indefinite-lived license |  |  |  |  |  | $ 13,800
Finite-lived license |  |  |  |  |  | 5,900
Operating lease liabilities |  |  |  |  |  | $ 3,800

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482686/350-30-45-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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