Note 3 - Stock-Based Compensation (Detail) - Summary of the Company's Stock Options (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Jun. 30, 2012
Number Of Shares	597
Weighted Average Exercise Price Per Share (in Dollars per share)	$ 5.94
Weighted Average Remaining Contractual Term (in years)	4 years
Aggregate Intrinsic Value (in Dollars)	$ 516
Exercisable as of June 30, 2012	560
Exercisable as of June 30, 2012 (in Dollars per share)	$ 5.94
Exercisable as of June 30, 2012	4 years
Exercisable as of June 30, 2012 (in Dollars)	$ 516
Exercised	(10)
Exercised (in Dollars per share)	$ 4.03
Cancelled/Forfeited	(20)
Cancelled/Forfeited (in Dollars per share)	$ 6.65
Number Of Shares	567
Weighted Average Exercise Price Per Share (in Dollars per share)	$ 5.95

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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