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Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Statement of Financial Position [Abstract] |  |
Allowance for doubtful accounts | $ 79 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | $ 58 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Common Stock: |  |
Par value (in dollars per share) | $ 0.001 us-gaap_CommonStockParOrStatedValuePerShare | $ 0.001 us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized (in shares) | 50,000,000 us-gaap_CommonStockSharesAuthorized | 50,000,000 us-gaap_CommonStockSharesAuthorized
Common stock, sharse issued (in shares) | 9,111,790 us-gaap_SharesIssued | 9,097,827 us-gaap_SharesIssued
Common stock, shares outstanding (in shares) | 9,111,790 us-gaap_CommonStockSharesOutstanding | 9,097,827 us-gaap_CommonStockSharesOutstanding

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