Note I - Stockholders' Equity (Details Textual) - USD ($)	1 Months Ended					2 Months Ended	12 Months Ended
	Jan. 31, 2017	Dec. 31, 2016	Jul. 31, 2016	Jun. 30, 2016	May 31, 2014	Jan. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Proceeds from Issuance of Private Placement				$ 2,000,000	$ 10,000,000		$ 2,225,000
Shares Issued, Price Per Share			$ 2.40
Proceeds from Issuance of Common Stock			$ 250,000				$ 2,573,220
Stock Issued During Period, Shares, New Issues			104,200
Common Stock, Capital Shares Reserved for Future Issuance		4,600,250					4,600,250	2,391,220
Deferred Compensation Arrangement with Individual, Common Stock Reserved for Future Issuance		1,270,481					1,270,481	963,451
Other Stock Options and Warrants [Member]
Common Stock, Capital Shares Reserved for Future Issuance		3,329,769					3,329,769	1,427,769
Chief Executive Officer, Chief Financial Officer and Employees [Member]
Deferred Compensation Arrangement with Individual, Shares Authorized for Issuance		1,270,481					1,270,481	963,451
Private Placement [Member]
Stock Issued During Period, Value, Restricted Stock Award, Gross				$ 1,000,000
Shares Issued, Price Per Share				$ 2	$ 1.50
Proceeds from Issuance of Common Stock					$ 3,000,000
Stock Issued During Period, Shares, New Issues					2,000,000
Private Placement [Member] | Series A Convertible Preferred Stock [Member]
Shares Issued, Price Per Share					$ 1,000
Stock Issued During Period, Shares, New Issues					7,000
Proceeds from Issuance of Convertible Preferred Stock					$ 7,000,000
Preferred Stock, Redemption Price Per Share					$ 2.37
Private Placement [Member] | Series A Convertible Preferred Stock [Member] | Conversion Price if Certain Conditions are Not Met [Member]
Preferred Stock, Redemption Price Per Share					$ 1.50
Underwritten Public Offering [Member]
Shares Issued, Price Per Share		$ 1.50					$ 1.50
Proceeds from Issuance of Common Stock		$ 3,000,000
Stock Issued During Period, Shares, New Issues		2,000,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		1,592,775					1,592,775
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right		0.75					0.75
Class of Warrant or Right, Expiration Period		3 years
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 2.55					$ 2.55
Over-Allotment Option [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		92,775					92,775
Over-Allotment Option [Member] | Subsequent Event [Member]
Shares Issued, Price Per Share	$ 1.499					$ 1.499
Proceeds from Issuance of Common Stock	$ 186,000					$ 3,200,000
Stock Issued During Period, Shares, New Issues	123,700
Payments of Stock Issuance Costs						$ 426,780