Note 10 - Stock Repurchase Plan (Details Textual) - USD ($)	3 Months Ended
	Jun. 30, 2015	Jan. 21, 2009
Treasury Stock, Shares, Acquired	0
Stock Repurchase Program, Authorized Amount		$ 2,500,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 1,236,595