Note 3 - Balance Sheet Components (Details) - Accrued Liabilities (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Note 3 - Balance Sheet Components (Details) - Accrued Liabilities [Line Items]
Accrued Liabilities	$ 8,559	$ 17,376
Proceeds From Litigation [Member]
Note 3 - Balance Sheet Components (Details) - Accrued Liabilities [Line Items]
Accrued Liabilities		9,489
Deferred Revenue And Customer Prepayments [Member]
Note 3 - Balance Sheet Components (Details) - Accrued Liabilities [Line Items]
Accrued Liabilities	2,940	2,523
Stock Rotation Reserve [Member]
Note 3 - Balance Sheet Components (Details) - Accrued Liabilities [Line Items]
Accrued Liabilities	1,779	1,459
Sales Rebate [Member]
Note 3 - Balance Sheet Components (Details) - Accrued Liabilities [Line Items]
Accrued Liabilities	1,072	900
Commissions [Member]
Note 3 - Balance Sheet Components (Details) - Accrued Liabilities [Line Items]
Accrued Liabilities	786	931
Warranty [Member]
Note 3 - Balance Sheet Components (Details) - Accrued Liabilities [Line Items]
Accrued Liabilities	334	451
Other Liability [Member]
Note 3 - Balance Sheet Components (Details) - Accrued Liabilities [Line Items]
Accrued Liabilities	$ 1,648	$ 1,623