Note 3 - Net Earnings Per Share (Details) - Basic and Diluted Earnings per Common Share (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Basic and Diluted Earnings per Common Share [Abstract]
Net earnings (in Dollars)	$ 456,110	$ 227,432	$ 594,621	$ 644,445
Earnings Per Share:
Basic (in Dollars per share)	$ 0.19	$ 0.09	$ 0.24	$ 0.26
Diluted (in Dollars per share)	$ 0.18	$ 0.09	$ 0.24	$ 0.26
Weighted Average Shares Outstanding:
Basic	2,446,286	2,446,286	2,446,286	2,446,286
Diluted	2,485,246	2,450,165	2,477,047	2,454,162