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Note J - Deferred Revenue (Detail) - Components of Deferred Revenue (USD $)
Dec. 31, 2012
Dec. 31, 2011
Current Portion    
Deferred Revenue, Current $ 508,520 $ 527,092
Long-Term Portion    
Maintenance contracts   1,000
Total 508,520 528,092
Maintenance Contracts [Member]
   
Current Portion    
Deferred Revenue, Current 496,055 335,246
Long-Term Portion    
Maintenance contracts   1,000
Customer Deposit [Member]
   
Current Portion    
Deferred Revenue, Current 12,465 122,500
Fully Deferred Systems, Installation and Acceptance Revenue [Member]
   
Current Portion    
Deferred Revenue, Current   $ 69,346