XML 42 R53.htm IDEA: XBRL DOCUMENT v3.2.0.727
Note 8 - Income Taxes (Details Textual) - USD ($)
 12 Months Ended
May. 31, 2015
May. 25, 2014
May. 26, 2013
May. 27, 2012
Domestic Tax Authority [Member] | Earliest Tax Year [Member]        
Open Tax Year 1997      
Domestic Tax Authority [Member]        
Operating Loss Carryforwards $ 7,800,000      
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]        
Operating Loss Carryforwards 800,000      
Deferred Tax Asset, Operating Loss, Recorded to Additional Paid in Capital 500,000      
Deferred Tax Assets, Tax Credit Carryforwards, Research 1,600,000      
Deferred Tax Asset, Research and Development Credit, Recorded to Additional Paid in Capital 1,100,000      
State and Local Jurisdiction [Member] | Indiana [Member]        
Operating Loss Carryforwards 6,600,000      
State and Local Jurisdiction [Member] | Other States, Tax Board [Member]        
Operating Loss Carryforwards $ 13,300,000      
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]        
Open Tax Year 1998      
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 35.00% 35.00% 35.00%  
Decrease in Net Income Before Taxes 28.00% 7.00%    
Effective Income Tax Rate Reconciliation, Percent   36.00% 30.00%  
Deferred Tax Assets, Valuation Allowance $ 1,234,000 $ 881,000    
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 353,000      
Unrecognized Tax Benefits 987,000 1,035,000 $ 998,000 $ 766,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate $ 800,000 $ 817,000