XML 22 R30.htm IDEA: XBRL DOCUMENT v2.4.0.8

Subsidiaries of the Registrant (Details) (USD $)	6 Months Ended	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 M-tron Industries, Ltd. [Member]	Jun. 30, 2014 Piezo Technology, Inc. [Member]	Jun. 30, 2014 Piezo Technology India Private Ltd. [Member]	Jun. 30, 2014 M-tron Asia LLC [Member} [Member]	Jun. 30, 2014 M-tron Services Ltd [Member]	Jun. 30, 2014 Lynch Systems, Inc. [Member]	Jun. 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

X

- Details

Name:	lgl_SubsidiariesOfEntityByOwnershipPercentageAbstract
Namespace Prefix:	lgl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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

+ References

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

+ Details

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

X

- Definition

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration