Gain on Equity Investment	12 Months Ended
Dec. 31, 2022
Equity Method Investments And Joint Ventures [Abstract]
Gain on Equity Investment	D. Gain on Equity Investment In November 2019, the Company made its initial investment of $3,350,000 in the Sponsor of the SPAC and subscribed to an additional investment of $2,725,000 in March 2021, which was funded in May 2021. The incremental investment was part of the Sponsor syndication to participate in a private placement (“PIPE”) in connection with the IronNet Business Combination. As previously discussed, the SPAC completed a merger with its target company on August 26, 2021, and the combined company began trading its common stock on the NYSE under the symbol “IRNT”. On September 14, 2021, as a result of its Sponsor investment, the Company received 1,572,529 shares of IRNT common stock and 2,065,000 IRNT private warrants exchangeable into shares of IRNT common stock. On October 1, 2021, the Company exercised its 2,065,000 warrants on a cashless basis and received 1,271,406 shares of IRNT common stock. As of December 31, 2022, the Company has disposed of 2,645,185 of its 2,843,935 shares of IRNT common stock and, with 198,750 shares of IRNT common stock remaining in our portfolio at December 31, 2022 valued at approximately $46,000. For the year ended December 31, 2021, the Company recognized a gain on equity investment in unconsolidated subsidiary of $59,453,000 for representing its share of the Sponsor’s gains and losses through the September 14, 2021 distribution of IRNT common stock and private warrants. Subsequent to the September 14, 2021 Sponsor distribution, the Company’s IRNT securities held have been classified as marketable securities, under ASC 321, Investments – Equity Securities (“ASC 321”), with the change in fair value of period end holdings reported as an unrealized gain or loss. See Note E. – Marketable Securities. Subsequent to the September 14, 2021 Sponsor distribution, LGL’s interest in the Sponsor is currently immaterial.

Gain on Equity Investment

12 Months Ended

Dec. 31, 2022

Equity Method Investments And Joint Ventures [Abstract]

D. Gain on Equity Investment

In November 2019, the Company made its initial investment of $3,350,000 in the Sponsor of the SPAC and subscribed to an additional investment of $2,725,000 in March 2021, which was funded in May 2021. The incremental investment was part of the Sponsor syndication to participate in a private placement (“PIPE”) in connection with the IronNet Business Combination. As previously discussed, the SPAC completed a merger with its target company on August 26, 2021, and the combined company began trading its common stock on the NYSE under the symbol “IRNT”.

On September 14, 2021, as a result of its Sponsor investment, the Company received 1,572,529 shares of IRNT common stock and 2,065,000 IRNT private warrants exchangeable into shares of IRNT common stock. On October 1, 2021, the Company exercised its 2,065,000 warrants on a cashless basis and received 1,271,406 shares of IRNT common stock. As of December 31, 2022, the Company has disposed of 2,645,185 of its 2,843,935 shares of IRNT common stock and, with 198,750 shares of IRNT common stock remaining in our portfolio at December 31, 2022 valued at approximately $46,000.

For the year ended December 31, 2021, the Company recognized a gain on equity investment in unconsolidated subsidiary of $59,453,000 for representing its share of the Sponsor’s gains and losses through the September 14, 2021 distribution of IRNT common stock and private warrants.

Subsequent to the September 14, 2021 Sponsor distribution, the Company’s IRNT securities held have been classified as marketable securities, under ASC 321, Investments – Equity Securities (“ASC 321”), with the change in fair value of period end holdings reported as an unrealized gain or loss. See Note E. – Marketable Securities. Subsequent to the September 14, 2021 Sponsor distribution, LGL’s interest in the Sponsor is currently immaterial.