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14. Quarterly financial information (unaudited)
12 Months Ended
Dec. 31, 2013
Notes to Financial Statements  
Quarterly financial information (unaudited) - Note 14

14. Quarterly financial information (Unaudited)

The following table presents our unaudited quarterly financial information for the years ending December 31, 2013 and 2012 (in thousands, except per share data):

      Fiscal Year 2013
      December 31,     September 30,     June 30,     March 31,
Revenue   $ 1,217    $ 964    $ 1,870    $ 1,801 
Gross margin (loss)     1,164      880      1,007      1,000 
Net loss     (2,421)     (3,667)     (3,436)     (3,654)
Net loss per share basic and diluted     (0.08)     (0.13)     (0.13)     (0.14)
                         
      Fiscal Year 2012
      December 31,     September 30,     June 30,     March 31,
Revenue   $ 2,727    $ 2,613    $ 1,295    $ 1,730 
Gross margin (loss)     1,238      1,475      1,328      (2,600)
Net loss     (4,074)     (3,845)     (4,971)     (9,803)
Net loss per share basic and diluted     (0.16)     (0.15)     (0.26)     (0.58)