Annual report pursuant to Section 13 and 15(d)

Note D - Income Taxes (Details Textual)

v3.19.3
Note D - Income Taxes (Details Textual) - USD ($)
 3 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Accrued Income Taxes, Current $ 145,000 $ 145,000 $ 464,000    
Deferred Tax Assets, Valuation Allowance, Total 47,014 47,014 104,858 $ 159,154 $ 322,404
Domestic Tax Authority [Member]          
Operating Loss Carryforwards, Total 0 $ 0 0    
Open Tax Year   2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2017 2018      
State and Local Jurisdiction [Member]          
Operating Loss Carryforwards, Total 1,905,000 $ 1,905,000 3,468,000    
Operating Loss Carryforwards, Valuation Allowance, Total 47,000 47,000 $ 105,000    
State and Local Jurisdiction [Member] | Deferred Tax Assets Related to Operating Loss Carryforwards [Member]          
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount (58,000)        
State and Local Jurisdiction [Member] | Valuation Allowance, Operating Loss Carryforwards, Expired and Utilized [Member]          
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount (68,000)        
State and Local Jurisdiction [Member] | Valuation Allowance, Operating Loss Carryforwards, Higher Expected NOL Utilization [Member]          
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 10,000        
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]          
Tax Credit Carryforward, Amount 241,000 241,000      
State and Local Jurisdiction [Member] | Alternative Minimum Tax [Member]          
Tax Credit Carryforward, Amount 50,000 50,000      
State and Local Jurisdiction [Member] | Research and Development and Alternative Minimum Tax Credit Carryforwards [Member]          
Deferred Tax Assets, Valuation Allowance, Total $ 0 $ 0