Note 11 - Commitments and Other (Details Textual)	1 Months Ended		3 Months Ended		6 Months Ended
	Jul. 31, 2016 USD ($) $ / shares shares	Mar. 31, 2014 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) ft² shares	Jun. 30, 2015 USD ($)
Director of Clinical Affairs [Member]
Stock Issued During Period, Shares, Stock Options Exercised Attributable to Consultants | shares					8,333
Royalty Expense			$ 110,764	$ 84,947	$ 300,643	$ 196,431
Professional Fees			68,757	39,000	$ 137,502	78,000
Subsequent Event [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues | shares	104,200
Shares Issued, Price Per Share | $ / shares	$ 2.40
Subsequent Event [Member]
Proceeds from Issuance of Common Stock	$ 250,000
Common Stock [Member]
Stock Issued During Period, Shares, New Issues | shares					1,000,000
Area of Office Space | ft²					7,625
Operating Leases, Rent Expense, Minimum Rentals					$ 12,522
Operating Leases, Rent Expense			34,749	23,927	69,987	37,752
Payments for Postemployment Benefits		$ 203,111
Define Benefit Plan, Payment Period		5 years
Pension Expense			$ 51,000	$ 51,000	$ 100,000	$ 102,000
Additional Percentage of Director Compensation on Sales Value Using Certain Specify Technology					2.50%
Additional Percentage of Director Compensation Sales Value Using Other Kind of Technology					5.00%
Lease Expiration Date					Jan. 31, 2020