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Note 6 - Business Segments (Tables)
3 Months Ended
Mar. 31, 2015
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   

Three Months Ended

March 31,

 
   

2015

   

2014

 

Net sales to unaffiliated customers:

               

Greens Creek

  $ 67,355     $ 63,596  

Lucky Friday

    19,891       20,096  

Casa Berardi

    31,846       42,095  
    $ 119,092     $ 125,787  

Income (loss) from operations:

               

Greens Creek

  $ 14,693     $ 11,046  

Lucky Friday

    3,546       4,700  

Casa Berardi

    (765

)

    3,441  

Other

    (12,552

)

    (11,276

)

    $ 4,922     $ 7,911  
    March 31, 2015     December 31, 2014  

Identifiable assets:

               

Greens Creek

  $ 704,348     $ 704,121  

Lucky Friday

    369,503       356,482  

Casa Berardi

    789,989       800,961  

Other

    396,111       400,500  
    $ 2,259,951     $ 2,262,064