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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 29, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Trade accounts receivable allowance for doubtful accounts	$ 347,000us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent	$ 340,000us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Preferred stock - par value (in dollars per share)	$ 0.10us-gaap_PreferredStockParOrStatedValuePerShare	$ 0.10us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized	1,000,000us-gaap_PreferredStockSharesAuthorized	1,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Common stock, par value (in dollars per share)	$ 0.10us-gaap_CommonStockParOrStatedValuePerShare	$ 0.10us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized	40,000,000us-gaap_CommonStockSharesAuthorized	40,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	18,974,211us-gaap_CommonStockSharesIssued	18,941,544us-gaap_CommonStockSharesIssued
Treasury stock shares	1,691,771us-gaap_TreasuryStockShares	1,600,731us-gaap_TreasuryStockShares

X

- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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