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