Note 3 - Stock-based Compensation - Unrecognized Compensation Expense for Non-vested Restricted Stock Awards (Details) - USD ($)	Jun. 30, 2015
2015 [Member] | Restricted Stock [Member]
2015	$ 38,751
2016	77,503
2017	77,503
2018	77,503
2019	9,688
	280,948
2014 [Member] | Restricted Stock [Member]
2015	38,753
2016	77,506
2017	77,506
2018	$ 9,688
2019
	$ 203,453
Restricted Stock [Member]
2015	77,504
2016	155,009
2017	155,009
2018	87,191
2019	9,688
	484,401
	$ 0