Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current Assets:
Allowance for doubtful accounts	$ 1,619	$ 1,049
Unamortized debt discount, current	7	10
Unamortized debt discount, noncurrent	$ 7	$ 38
Stockholders' Equity:
Preferred stock, par value (per share)	$ 0.1	$ 0.1
Preferred stock, shares authorized	500,000us-gaap_PreferredStockSharesAuthorized	500,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
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
Common stock, shares issued	36,232,074us-gaap_CommonStockSharesIssued	38,088,391us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	36,191,565us-gaap_CommonStockSharesOutstanding	38,047,882us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	40,509us-gaap_TreasuryStockShares	40,509us-gaap_TreasuryStockShares

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