Note I - Stockholders' Equity (Details Textual) - USD ($)			1 Months Ended			12 Months Ended
	Dec. 17, 2019	May 14, 2019	Mar. 31, 2019	Feb. 28, 2019	May 31, 2014	Dec. 31, 2019	Dec. 17, 2019	Dec. 31, 2018	Nov. 30, 2019	Dec. 31, 2017
Class of Warrant or Right, Exercise Price of Warrants or Rights						$ 0.50		$ 2.55
Proceeds from Issuance of Private Placement				$ 250,000	$ 10,000,000	$ 250,000
Proceeds from Issuance of Common Stock						$ 1,974,547
Deferred Compensation Arrangement with Individual, Shares Authorized for Issuance						2,375,760		2,470,566
Reclassification of Shares to be Issued, Amount	$ 1,400,000					$ 1,300,000
Class of Warrant or Right, Exercised During Period						675,000
Stock Issued During Period, Shares, Shares to be Issued						1,300,000
Gain (Loss) from Warrants Exercised						$ (500,000)
Gain (Loss) on Issuance of Shares to be Issued						(500,000)
Adjustments to Additional Paid in Capital, Warrants Exercised						650,000
Adjustments to Additional Paid in Capital, Shares to be Issued						$ 1,070,000
Common Stock, Shares Authorized	75,000,000					75,000,000	75,000,000	75,000,000
Shares To Be Issued, Marked To Market, Shares	2,100,000
Market to Market, Gain (Loss)	$ (500,000)					$ (2,600,000)
Adjustments to Additional Paid in Capital, Reclassification of Derivative Liability to Option						380,000
Adjustments to Additional Paid in Capital, Reclassification of Derivative Liability to Equity	2,640,000					$ 4,115,778	$ 2,700,000
Adjustments to Additional Paid in Capital, Warrants Exercised and Shares to be Issued	$ 4,100,000
Reclassification of Shares to be Issued, Shares	3,400,000
Share Price	$ 0.42					$ 0.84	$ 0.42
Stock Issued During Period Shares, Warrants Exercised						675,000
Reclassification to Additional Paid in Capital	$ 1,070,000					$ 655,000
Common Stock, Shares, To be Issued	2,100,000						2,100,000
Gain (Loss) on Liability Classified Shares to Be Issued	$ (1.80)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Reclassified in Period						600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Reclassified in Period, Value						$ 422,000
Warrant [Member]
Derivative, Gain (Loss) on Derivative, Net, Total						(500,000)
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Share based Compensation Arrangement By Share based Payment Award, Options Reclassified In Period, Marked To Market	600,000
Market to Market, Gain (Loss)	40,000					$ 40,000
Reclassification To Derivative Liability for Share Based Compensation	$ 422,000
Share Price						$ 1.28
Shares To Be Issued [Member]
Reclassification of Shares to be Issued, Amount						$ 1,405,000
Market to Market, Gain (Loss)						$ (1,800,000)
Chief Executive Officer, Chief Financial Officer and Employees [Member]
Deferred Compensation Arrangement with Individual, Shares Authorized for Issuance						2,226,473				1,908,814
Non-Employees [Member]
Common Stock, Capital Shares Reserved for Future Issuance						149,287		561,752
Preferred Stock Converted to Common Stock [Member]
Conversion of Stock, Conversion Price		$ 1.17
Conversion of Stock, Shares Issued		5,982,906
Warrants, Public Offering [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				1,428,750
Warrants and Rights Outstanding, Term				5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 0.50
Underwrite Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			141,850	141,850
Warrants, Private Offering [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				178,571
Warrants and Rights Outstanding, Term				5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 0.50
Warrants Issued in 2016 Capital Raise [Member]
Class of Warrant or Right, Reclassified During Period						1,600,000
Class of Warrant or Right, Value, Reclassified During Period						$ 0
Class of Warrant or Right, Marked to Market	1,600,000
Market to Market, Gain (Loss)						$ (860,000)
Adjustments to Additional Paid in Capital, Reclassification of Derivative Liability to Warrants	$ 1,095,000
Reclassification To Derivatives Liabilities for Warrants	$ 0
Reclassification of Shares to be Issued, Shares						3,400,000
Warrants Issued in 2019 Capital Raise [Member]
Class of Warrant or Right, Reclassified During Period						1,700,000
Class of Warrant or Right, Value, Reclassified During Period						$ 376,000
Class of Warrant or Right, Marked to Market	1,100,000
Market to Market, Gain (Loss)						$ 0
Adjustments to Additional Paid in Capital, Reclassification of Derivative Liability to Warrants	$ 0
Adjustments to Additional Paid in Capital, Reclassification of Derivative Liability to Option	380,000
Reclassification To Derivatives Liabilities for Warrants	37,600
Warrants Previously Classified as Derivative Liability [Member]
Class of Warrant or Right, Exercised During Period						665,000
The 2019 Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights						1,084,171			1,749,171
Market to Market, Gain (Loss)	(860,000)
Adjustments to Additional Paid in Capital, Reclassification of Derivative Liability to Warrants						$ 1,095,000
The 2016 Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights						1,592,775			1,592,775
Market to Market, Gain (Loss)	$ 0
Adjustments to Additional Paid in Capital, Reclassification of Derivative Liability to Warrants						$ 0
Public Offering [Member]
Proceeds from Issuance or Sale of Equity, Total				$ 2,000,000
Stock Issued During Period, Shares, New Issues				5,715,000
Proceeds from Stock Options Exercised			$ 198,000	$ 198,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			567,400	567,400
Private Placement [Member]
Stock Issued During Period, Shares, New Issues				714,286	2,000,000
Proceeds from Issuance of Common Stock					$ 3,000,000
Shares Issued, Price Per Share					$ 1.50
Proceeds from Issuance of Convertible Preferred Stock					$ 7,000,000
Private Placement [Member] | Series A Convertible Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues					7,000
Shares Issued, Price Per Share					$ 1,000
Preferred Stock, Redemption Price Per Share					2.545
Private Placement [Member] | Series A Convertible Preferred Stock [Member] | Conversion Price if Common Stock Not Trade at 3.15 [Member]
Preferred Stock, Redemption Price Per Share					$ 1.50