Note 14 - Severance Costs (Details) - Accrued Severance Liability Activity (USD $) In Thousands, unless otherwise specified	9 Months Ended
Mar. 31, 2015
Accrued Severance Liability Activity [Abstract]
Balance at June 30, 2014
Accrual of expense	1,297lyts_AccruedSeveranceLiability
Payments	(530)lyts_PaymentsForSeveranceLiability
Adjustments	(635)lyts_AdjustmentsToSeveranceLiability
Balance at March 31, 2015	$ 132

Liability for amount due employees, in addition to wages and any other money that employers owe employees, when their employment ends through a layoff or other termination. For example, a company may provide involuntarily terminated employees with a lump sum payment equal to one week's salary for every year of employment.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Other Postemployment Benefits

-URI http://asc.fasb.org/extlink&oid=6519534

Name:	us-gaap_SupplementalUnemploymentBenefitsSeveranceBenefits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant