Note 9 - Net Investment and Other Income (Expense) and Interest Expense (Tables)
12 Months Ended
Dec. 31, 2014
Other Income and Expenses [Abstract]  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
   

Years Ended December 31,

 
   

2014

   

2013

   

2012

 
   

(In thousands)

 

Investment income, net

  $ 73     $ 95     $ 128  

Loss on extinguishment of debt

    —       —       (279 )

Net foreign exchange gain (loss)

    (4 )     (3 )     1  

Gain (loss) on sale of equipment

    1       45       24  

Gain (loss) on sale of investment

    6       —       (1 )

Other income

    —       —       —  

Total investment and other income (expense), net

  $ 76     $ 137     $ (127 )