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Environmental Reserve (Details Textual) (USD $)
6 Months Ended 12 Months Ended
Dec. 28, 2014
Jun. 27, 2010
Jun. 29, 2014
Environmental Remediation Obligations [Abstract]      
Environmental reserve originally established in 1995 $ 3,000,000strt_OriginalAccrualEstablishedForEnvironmentalLossContingencies    
Reserve reduced   (1,100,000)us-gaap_AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimates  
Environmental reserve 1,389,000us-gaap_AccruedEnvironmentalLossContingenciesCurrent 1,500,000us-gaap_AccruedEnvironmentalLossContingenciesCurrent 1,397,000us-gaap_AccruedEnvironmentalLossContingenciesCurrent
Costs incurred to date to install and monitor wells $ 486,000strt_CostsIncurredToDateToInstallAndMonitorWells