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Note 2 - Pro-forma Information (Details) (M.C. Healthcare Products "MCHP" [Member], USD $)
12 Months Ended
Sep. 29, 2012
M.C. Healthcare Products "MCHP" [Member]
 
Pro-forma net revenues $ 78,540,000us-gaap_BusinessAcquisitionsProFormaRevenue
/ us-gaap_BusinessAcquisitionAxis
= span_MCHealthcareProductsMchpMember
Pro-forma net income $ 5,350,000us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= span_MCHealthcareProductsMchpMember
Pro-forma net income per diluted share (in dollars per share) $ 1.81us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
/ us-gaap_BusinessAcquisitionAxis
= span_MCHealthcareProductsMchpMember