Note 6 - Variable Interest Entities - VIEs (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
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| Cash and cash equivalents | $ 45,115 | $ 45,115 | $ 41,514 | ||||||
| Restricted cash and cash equivalents | 320 | 320 | 0 | ||||||
| Accounts receivable, net of allowance of $52 and $52, respectively | 538 | 538 | 572 | ||||||
| Total current assets | 47,006 | 47,006 | 46,324 | ||||||
| Convertible promissory note, at fair value | 1,968 | 1,968 | 0 | ||||||
| Other assets | 7 | 7 | 0 | ||||||
| Total assets | 49,684 | 49,684 | 46,776 | ||||||
| Total liabilities | 2,097 | 2,097 | 1,211 | ||||||
| Equity, Attributable to Noncontrolling Interest | 3,245 | 3,245 | 2,077 | ||||||
| Total revenue | 1,153 | $ 924 | 2,238 | $ 1,842 | |||||
| Less: Net income attributable to non-controlling interests | 1 | 6 | 18 | 25 | |||||
| Net income attributable to LGL Group | (353) | (51) | (975) | (57) | |||||
| Variable Interest Entity, Primary Beneficiary [Member] | |||||||||
| Cash and cash equivalents | 3,203 | 3,203 | 3,169 | ||||||
| Restricted cash and cash equivalents | 20 | 20 | 0 | ||||||
| Accounts receivable, net of allowance of $52 and $52, respectively | 17 | 17 | 17 | ||||||
| Total current assets | 3,240 | 3,240 | 3,186 | ||||||
| Convertible promissory note, at fair value | 1,968 | 1,968 | 0 | ||||||
| Other assets | 7 | 7 | 0 | ||||||
| Total assets | 5,215 | 5,215 | 3,186 | ||||||
| Total liabilities | 0 | 0 | 0 | ||||||
| Total revenue | 34 | 31 | 61 | 61 | |||||
| Less: Net income attributable to non-controlling interests | 1 | 6 | 18 | 25 | |||||
| Net income attributable to LGL Group | 1 | $ 4 | 10 | $ 14 | |||||
| LGL Systems Acquisition Holding Company, LLC [Member] | |||||||||
| Equity, Attributable to Noncontrolling Interest | 2,099 | 2,099 | 2,077 | ||||||
| Variable Interest Entity, Not Primary Beneficiary [Member] | |||||||||
| Total assets | 2,712 | 2,712 | 615 | ||||||
| On-balance sheet (a) (b) | [1],[2] | 852 | 852 | 4 | |||||
| Off-balance sheet | 0 | 0 | 0 | ||||||
| Total | 852 | 852 | 4 | ||||||
| Skyline SPV [Member] | |||||||||
| Total assets | 2,091 | 2,091 | |||||||
| Equity, Attributable to Noncontrolling Interest | 1,146 | 1,146 | $ 0 | ||||||
| Total | $ 848 | $ 848 | |||||||
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| X | ||||||||||
- Definition The reporting entity's maximum amount of exposure to loss off balance sheet as a result of its involvement with the Variable Interest Entity (VIE). No definition available.
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| X | ||||||||||
- Definition The reporting entity's maximum amount of exposure to loss on balance sheet as a result of its involvement with the Variable Interest Entity (VIE). No definition available.
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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of asset recognized for present right to economic benefit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of asset recognized for present right to economic benefit, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of liability recognized for present obligation requiring transfer or otherwise providing economic benefit to others. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of equity (deficit) attributable to noncontrolling interest. Excludes temporary equity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after allowance for credit loss, of financing receivable, classified as noncurrent. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of noncurrent assets classified as other. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cash and cash equivalent restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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