Subsidiaries of the Registrant (Details) (USD $)	9 Months Ended	3 Months Ended
Sep. 30, 2014	Sep. 30, 2014 M-tron Industries, Ltd. [Member]	Sep. 30, 2014 Piezo Technology, Inc. [Member]	Sep. 30, 2014 Piezo Technology India Private Ltd. [Member]	Sep. 30, 2014 M-tron Asia LLC [Member} [Member]	Sep. 30, 2014 M-tron Services Ltd [Member]	Sep. 30, 2014 Lynch Systems, Inc. [Member]	Sep. 30, 2014 M-tron Industries, Inc. [Member]
Subsidiaries of the entity, by ownership percentage [Abstract]
Owned By LGL (in hundredths)		99.90%	100.00%	99.00%	100.00%	100.00%	100.00%	100.00%
Cash consideration	$ 700,000

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration