Note 5 - Accrued Liabilities (Details) - Accrued Liabilities (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Note 5 - Accrued Liabilities (Details) - Accrued Liabilities [Line Items]    
Accrued Liabilities $ 17,376 $ 5,915
Proceeds From Litigation [Member]
    
Note 5 - Accrued Liabilities (Details) - Accrued Liabilities [Line Items]    
Accrued Liabilities 9,489  
Deferred Revenue And Customer Prepayments [Member]
    
Note 5 - Accrued Liabilities (Details) - Accrued Liabilities [Line Items]    
Accrued Liabilities 2,523 2,198
Stock Rotation Reserve [Member]
    
Note 5 - Accrued Liabilities (Details) - Accrued Liabilities [Line Items]    
Accrued Liabilities 1,459 961
Commissions [Member]
    
Note 5 - Accrued Liabilities (Details) - Accrued Liabilities [Line Items]    
Accrued Liabilities 931 464
Sales Rebate [Member]
    
Note 5 - Accrued Liabilities (Details) - Accrued Liabilities [Line Items]    
Accrued Liabilities 900 575
Warranty [Member]
    
Note 5 - Accrued Liabilities (Details) - Accrued Liabilities [Line Items]    
Accrued Liabilities 451 331
Other Liability [Member]
    
Note 5 - Accrued Liabilities (Details) - Accrued Liabilities [Line Items]    
Accrued Liabilities $ 1,623 $ 1,386