Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Consolidated Balance Sheets [Abstract]
Trade, allowance	$ 720	$ 780
Preferred stock, par value	$ 0.01
Preferred stock, shares authorized	10,000,000us-gaap_PreferredStockSharesAuthorized
Common stock, par value	$ 0.01
Common stock, shares authorized	100,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	22,049,529us-gaap_CommonStockSharesIssued	22,049,529us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	21,333,890us-gaap_CommonStockSharesOutstanding	21,767,700us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	715,639us-gaap_TreasuryStockShares	281,829us-gaap_TreasuryStockShares

For an unclassified balance sheet, a valuation allowance for receivables due a company 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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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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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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