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6. Property and Equipment
12 Months Ended
Jun. 30, 2014
Property, Plant and Equipment [Abstract]  
6. Property and Equipment

    Useful Lives           
        (Years)        2014    2013 
                
Automobiles   5   $14,900   $14,900 
Computer equipment   3 to 5    155,800    132,100 
Machinery and equipment   3 to 7    744,800    627,500 
Furniture and fixtures   4 to 10    206,900    181,000 
Leasehold improvements   3 to 5    72,800    71,700 
                
         1,195,200    1,027,200 
Less accumulated depreciation and amortization        943,100    870,700 
                
        $252,100   $156,500 

Depreciation expense was $71,900 and $61,700 for the years ended June 30, 2014 and 2013, respectively.