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Goodwill (Details) (USD $)
 3 Months Ended
Apr. 04, 2015
Goodwill [Roll Forward]  
Beginning balance $ 14,960,354us-gaap_Goodwill
Foreign exchange (163,969)us-gaap_GoodwillTranslationAdjustments
Ending balance 14,796,385us-gaap_Goodwill
Industrial Hardware Segment [Member]  
Goodwill [Roll Forward]  
Beginning balance 1,901,312us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= eml_IndustrialHardwareMember
Foreign exchange (163,969)us-gaap_GoodwillTranslationAdjustments
/ us-gaap_StatementBusinessSegmentsAxis
= eml_IndustrialHardwareMember
Ending balance 1,737,343us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= eml_IndustrialHardwareMember
Security Products Segment [Member]  
Goodwill [Roll Forward]  
Beginning balance 13,059,042us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= eml_SecurityProductsMember
Foreign exchange 0us-gaap_GoodwillTranslationAdjustments
/ us-gaap_StatementBusinessSegmentsAxis
= eml_SecurityProductsMember
Ending balance 13,059,042us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= eml_SecurityProductsMember
Metal Products Segment [Member]  
Goodwill [Roll Forward]  
Beginning balance 0us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= eml_MetalProductsMember
Foreign exchange 0us-gaap_GoodwillTranslationAdjustments
/ us-gaap_StatementBusinessSegmentsAxis
= eml_MetalProductsMember
Ending balance $ 0us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= eml_MetalProductsMember