Annual report pursuant to Section 13 and 15(d)

Note K - Stockholders' Equity (Details Textual)

v3.19.1
Note K - Stockholders' Equity (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Feb. 28, 2019
Jan. 31, 2017
Dec. 31, 2016
May 31, 2014
Dec. 31, 2018
Dec. 31, 2017
Proceeds from Issuance of Private Placement $ 250,000     $ 10,000,000 $ 150,836
Common Stock, Capital Shares Reserved for Future Issuance         5,315,974 5,111,582
Other Stock Options and Warrants [Member]            
Common Stock, Capital Shares Reserved for Future Issuance         2,845,409 3,710,335
Chief Executive Officer, Chief Financial Officer and Employees [Member]            
Deferred Compensation Arrangement with Individual, Shares Authorized for Issuance     1,374,931     1,908,813
Non-Employees [Member]            
Common Stock, Capital Shares Reserved for Future Issuance         561,752 26,316
Underwritten Public Offering [Member]            
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      
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right     0.75      
Shares Issued, Price Per Share     $ 1.50      
Proceeds from Issuance of Common Stock     $ 3,000,000      
Class of Warrant or Right, Expiration Period     3 years      
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 2.55      
Over-Allotment Option [Member]            
Stock Issued During Period, Shares, New Issues   123,700        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     92,775      
Shares Issued, Price Per Share   $ 1.499        
Proceeds from Issuance of Common Stock   $ 186,000        
Private Placement [Member]            
Stock Issued During Period, Shares, New Issues       2,000,000    
Shares Issued, Price Per Share       $ 1.50    
Proceeds from Issuance of Common Stock       $ 3,000,000    
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