Spin-Off of MtronPTI	12 Months Ended
Dec. 31, 2021
Spin Off [Abstract]
Spin-Off of MtronPTI	R. Spin-Off of MtronPTI In late 2021, the Company’s Board approved progressing with the Spin-Off (as defined below) of MtronPTI, which is currently a wholly-owned subsidiary of the Company. On February 14, 2022, the Company filed a Preliminary Proxy Statement with the SEC indicating its intention to secure stockholder approval of the transaction. If approved by the Company’s stockholders, the Spin-Off will separate the business activities and investments of the Company and create two separate, publicly-traded companies: (1) the Company, which will continue to own and operate PTF and hold substantially all the Company’s cash and marketable securities, and (2) MtronPTI, which includes the operations of Piezo Technology, Inc. and M-tron Asia, LLC (the “Spin-Off”). The Spin-Off, if approved by the Company’s stockholders, is expected to be effected through a pro rata issuance of shares of MtronPTI’s common stock to the Company’s stockholders structured as a tax-free distribution. Stockholders of the Company will receive one share of MtronPTI’s common stock for each share of the Company’s common stock held of record as of the close of business on the record date for the distribution. As a result, the Company’s stockholders as of the record date for the Spin-Off will also become the stockholders of MtronPTI after the Spin-Off. The Company will cease to have any ownership interest in MtronPTI following the Spin-Off, but the Company’s stockholders will, unless they sell their shares, be the stockholders of both the Company and MtronPTI. Management believes that, if completed, the potential Spin-Off of MtronPTI would enable shareholders to more clearly evaluate the performance and future potential of each entity on a standalone basis, while allowing each entity to pursue its own distinct business strategy and capital allocation policy. Separating MtronPTI as an independent, publicly owned company positions both MtronPTI and LGL Group to create value for their respective shareholders. The Spin-Off permits each company to tailor its strategic plans and growth opportunities, more efficiently raise and allocate resources, including capital raised through debt or equity offerings, flexibly use its own stock as currency for incentive compensation and potential acquisitions and provide investors a more targeted investment opportunity. Upon stockholder approval of the Spin-Off transaction, the Company anticipates reporting MtronPTI as a discontinued operation.

Spin-Off of MtronPTI

12 Months Ended

Dec. 31, 2021

R. Spin-Off of MtronPTI

In late 2021, the Company’s Board approved progressing with the Spin-Off (as defined below) of MtronPTI, which is currently a wholly-owned subsidiary of the Company. On February 14, 2022, the Company filed a Preliminary Proxy Statement with the SEC indicating its intention to secure stockholder approval of the transaction. If approved by the Company’s stockholders, the Spin-Off will separate the business activities and investments of the Company and create two separate, publicly-traded companies: (1) the Company, which will continue to own and operate PTF and hold substantially all the Company’s cash and marketable securities, and (2) MtronPTI, which includes the operations of Piezo Technology, Inc. and M-tron Asia, LLC (the “Spin-Off”).

The Spin-Off, if approved by the Company’s stockholders, is expected to be effected through a pro rata issuance of shares of MtronPTI’s common stock to the Company’s stockholders structured as a tax-free distribution. Stockholders of the Company will receive one share of MtronPTI’s common stock for each share of the Company’s common stock held of record as of the close of business on the record date for the distribution. As a result, the Company’s stockholders as of the record date for the Spin-Off will also become the stockholders of MtronPTI after the Spin-Off. The Company will cease to have any ownership interest in MtronPTI following the Spin-Off, but the Company’s stockholders will, unless they sell their shares, be the stockholders of both the Company and MtronPTI.

Management believes that, if completed, the potential Spin-Off of MtronPTI would enable shareholders to more clearly evaluate the performance and future potential of each entity on a standalone basis, while allowing each entity to pursue its own distinct business strategy and capital allocation policy. Separating MtronPTI as an independent, publicly owned company positions both MtronPTI and LGL Group to create value for their respective shareholders. The Spin-Off permits each company to tailor its strategic plans and growth opportunities, more efficiently raise and allocate resources, including capital raised through debt or equity offerings, flexibly use its own stock as currency for incentive compensation and potential acquisitions and provide investors a more targeted investment opportunity.

Upon stockholder approval of the Spin-Off transaction, the Company anticipates reporting MtronPTI as a discontinued operation.