Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

v2.4.1.9
Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Apr. 04, 2015
Jan. 03, 2015
Statement of Financial Position [Abstract]    
Allowance for Doubtful Accounts Receivable, Current $ 1,078,814us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 1,114,814us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Assets    
Accumulated depreciation $ 47,191,102us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment $ 46,036,102us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Shareholders' equity    
Common stock, par value (in dollars per share) $ 1us-gaap_CommonStockParOrStatedValuePerShare $ 1us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized (in shares) 12,000,000us-gaap_CommonStockSharesAuthorized 12,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued (in shares) 10,300,000us-gaap_CommonStockSharesIssued 10,300,000us-gaap_CommonStockSharesIssued
Common stock in treasury, at cost (in shares) 14,006,604us-gaap_TreasuryStockShares 14,068,144us-gaap_TreasuryStockShares