Quarterly report pursuant to Section 13 or 15(d)

ACQUISITION (Narrative) (Details)

v2.4.1.9
ACQUISITION (Narrative) (Details) (Specialty Pipe And Tube, Inc. [Member], USD $)
3 Months Ended
Apr. 04, 2015
Specialty Pipe And Tube, Inc. [Member]
 
Business Acquisition [Line Items]  
Revenue of Specialty since acquisition date $ 6,260,000us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
/ us-gaap_BusinessAcquisitionAxis
= synl_SpecialtyPipeAndTubeInc.Member
Pre-tax earnings of Specialty since acquisition date $ 710,000us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual
/ us-gaap_BusinessAcquisitionAxis
= synl_SpecialtyPipeAndTubeInc.Member