Condensed Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Allowance for doubtful accounts	$ 1,529	$ 1,619
Unamortized debt discount, current	0	7
Unamortized debt discount, noncurrent	$ 7	$ 7
Stockholders' Equity Note [Abstract]
Common stock, shares issued	35,271,413us-gaap_CommonStockSharesIssued	36,232,074us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	35,271,413us-gaap_CommonStockSharesOutstanding	36,191,565us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	0us-gaap_TreasuryStockShares	40,509us-gaap_TreasuryStockShares
Preferred stock, shares outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Common stock, par value (per share)	$ 0.10	$ 0.10
Common stock, shares authorized	60,000,000us-gaap_CommonStockSharesAuthorized	60,000,000us-gaap_CommonStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Preferred stock, shares authorized	500,000us-gaap_PreferredStockSharesAuthorized	500,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, par value (per share)	$ 0.10	$ 0.10

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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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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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