| Earnings Per Share [Text Block] |
11. Earnings Per Share ("EPS")
The following table presents a reconciliation of Net income (loss) and shares used in calculating basic and diluted net income (loss) per common share for the periods indicated:
| | | Three Months Ended June 30, | | Six Months Ended June 30, |
| | | 2026 | | 2025 | | 2026 | | 2025 |
| Numerator for EPS: | | | | | | | | | | | | | | | | |
| Net loss | | $ | (352 | ) | | $ | (45 | ) | | $ | (957 | ) | | $ | (32 | ) |
| Less: Net income from attributable to non-controlling interests | | | 1 | | | | 6 | | | | 18 | | | | 25 | |
| Net loss attributable to LGL Group common stockholders | | $ | (353 | ) | | $ | (51 | ) | | $ | (975 | ) | | $ | (57 | ) |
| | | | | | | | | | | | | | | | | |
| Denominator for EPS: | | | | | | | | | | | | | | | | |
| Weighted average common shares outstanding - basic | | | 6,410,602 | | | | 5,352,937 | | | | 6,379,287 | | | | 5,352,937 | |
| Dilutive effects (a): | | | | | | | | | | | | | | | | |
| Warrants | | | — | | | | — | | | | — | | | | — | |
| Subscription rights | | | — | | | | — | | | | — | | | | — | |
| Stock options | | | — | | | | — | | | | — | | | | — | |
| Restricted stock | | | — | | | | — | | | | — | | | | — | |
| Weighted average common shares outstanding - diluted | | | 6,410,602 | | | | 5,352,937 | | | | 6,379,287 | | | | 5,352,937 | |
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| Loss per common share attributable to LGL Group common stockholders: | | | | | | | | | | | | | | | | |
| Basic | | $ | (0.06 | ) | | $ | (0.01 | ) | | $ | (0.15 | ) | | $ | (0.01 | ) |
| Diluted | | $ | (0.06 | ) | | $ | (0.01 | ) | | $ | (0.15 | ) | | $ | (0.01 | ) |
| (a) | For the three and six months ended June 30, 2026, weighted average shares used for calculating earnings per share excludes subscription rights to purchase 6,550,435 shares of common stock, stock options to purchase 200,000 shares of common stock, and 138,315 shares from restricted stock awards as the inclusion of these instruments would be anti-dilutive to the earnings per share calculation. For the three and six months ended June 30, 2025, weighted average shares used for calculating earnings per share excludes warrants to purchase 1,051,664 shares of common stock as well as 36,274 shares from restricted stock awards as the inclusion of these instruments would be anti-dilutive to the earnings per share calculation. |
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