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Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Allowance for doubtful accounts | $ 102 | $ 129
Common Stock: |  |
Par value (in dollars per share) | $ 0.001 | $ 0.001
Common stock, shares authorized (in shares) | 50,000,000 | 50,000,000
Common stock, sharse issued (in shares) | 9,309,529 | 8,986,080
Common stock, shares outstanding (in shares) | 9,309,529 | 8,986,080

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