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14. Quarterly financial information (unaudited)
12 Months Ended
Dec. 31, 2015
Notes to Financial Statements  
Quarterly financial information (unaudited) - Note 14

14. QUARTERLY FINANCIAL INFORMATION (Unaudited)

The following table summarizes our unaudited quarterly financial information for the periods shown below (in thousands, except per share data):

      Fiscal Year 2015
      December 31,     September 30,     June 30,     March 31,
Revenue   $ 1,846    $ 2,398    $ 4,043    $ 901 
Gross profit     379      585      1,187      (143)
Net loss     (4,298)     (3,513)     (2,769)     (3,962)
Net loss per share, basic and diluted     (0.09)     (0.07)     (0.06)     (0.09)
                         
      Fiscal Year 2014
      December 31,     September 30,     June 30,     March 31,
Revenue   $ 687    $ 968    $ 611    $ 1,219 
Gross profit     178      600      443      1,220 
Net loss     (3,346)     (3,355)     (3,401)     (8,018)
Net loss per share, basic and diluted     (0.08)     (0.08)     (0.08)     (0.23)