XML 71 R58.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note H - Intangible Assets (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Amortization of Intangible Assets $ 13,726 $ 13,606
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 14,000  
Finite-Lived Intangible Assets, Amortization Expense, after Year Five 111,000  
Finite-Lived Intangible Assets, Amortization Expense, Year Two 14,000  
Finite-Lived Intangible Assets, Amortization Expense, Year Three 14,000  
Finite-Lived Intangible Assets, Amortization Expense, Year Four 14,000  
Finite-Lived Intangible Assets, Amortization Expense, Year Five 14,000  
Research, Development, and Engineering Expense [Member]    
Amortization of Intangible Assets $ 13,726 $ 13,606