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Note 2 - Summary of Significant Accounting Policies (Detail) - Warranty Activity (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Balance at the beginning of the period $ 110 $ 116 $ 100 $ 126
Accruals for warranties issued 27 15 58 22
Settlements made during the period (in cash or in kind) (12) (31) (33) (48)
Balance at the end of the period $ 125 $ 100 $ 125 $ 100