Note 5 - Accrued Liabilities (Tables)
 12 Months Ended
Dec. 31, 2013
Payables and Accruals [Abstract]  
Schedule of Accrued Liabilities [Table Text Block]
   

As of December 31,

 
   

2013

   

2012

 

Proceeds from litigation (see Note 10)

  $ 9,489     $ -  

Deferred revenue and customer prepayments

    2,523       2,198  

Stock rotation reserve

    1,459       961  

Commissions

    931       464  

Sales rebate

    900       575  

Warranty

    451       331  

Other

    1,623       1,386  

Total accrued liabilities

  $ 17,376     $ 5,915