Note 3 - Net Earnings Per Share (Details) - Basic and Diluted Earnings per Common Share (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Basic and Diluted Earnings per Common Share [Abstract]
Net earnings (in Dollars)	$ 454,897	$ 632,760	$ 1,049,518	$ 1,277,205
Earnings Per Share:
Basic (in Dollars per share)	$ 0.19	$ 0.26	$ 0.43	$ 0.52
Diluted (in Dollars per share)	$ 0.19	$ 0.26	$ 0.43	$ 0.52
Weighted Average Shares Outstanding:
Basic	2,408,198	2,446,286	2,433,544	2,446,286
Diluted	2,441,569	2,447,349	2,458,040	2,450,837