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Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2015
Accounting Policies [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   

Three months ended

 
   

March 31,

 
   

2015

   

2014

 

Numerator:

               

Income (loss) from continuing operations

  $ 1,165     $ (4,050 )

Loss from discontinued operations

    (36 )     (20 )

Net income (loss)

  $ 1,129     $ (4,070 )
                 
                 

Denominator:

               

Basic weighted average common shares outstanding

    9,671       5,172  

Potential common shares from options and warrants

    322       -  

Diluted weighted average shares

    9,993       5,172  
Schedule of Product Warranty Liability [Table Text Block]
   

Three months ended

 
   

March 31,

 
   

2015

   

2014

 
                 

Balance at beginning of period

  $ 188     $ 75  

Accruals for warranties issued

    352       16  

Settlements made during the period (in cash or in kind)

    (37 )     (16 )

Accrued warranty reserve

  $ 503     $ 75