Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 87	$ 153
Common stock, par value (usd per share)	$ 0.04	$ 0.04
Common stock, shares authorized	240,000,000us-gaap_CommonStockSharesAuthorized	240,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	70,875,998us-gaap_CommonStockSharesIssued	70,382,544us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	70,866,603us-gaap_CommonStockSharesOutstanding	70,373,149us-gaap_CommonStockSharesOutstanding
Treasury stock, number of shares	9,395us-gaap_TreasuryStockNumberOfSharesHeld	9,395us-gaap_TreasuryStockNumberOfSharesHeld

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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Number of shares held for each class of treasury stock.

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