Note 3 - Net Earnings Per Share (Details)	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share: [Abstract]
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants	0	43,500	10,000	43,500