Note 3 - Net Earnings Per Share (Detail)	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]
Incremental Common Shares Attributable to Call Options and Warrants	43,500	200,000	43,500	31,000