Note 8 - Stock-Based Compensation Plans (Detail) - Fair Value of Stock Options on Date of Grant, and Assumptions Used to Estimate the Fair Value of the Stock Options Granted During the Period: (USD $)	3 Months Ended	9 Months Ended
	Dec. 31, 2012	Dec. 31, 2012
Weighted-average expected volatility	60.20%	63.40%
Risk-free interest rate	1.60%	1.60%
Expected life of options (in years)	5 years 109 days	5 years 109 days
Fair value of options granted (in Dollars per share)	$ 1.40	$ 1.99