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7. Pension Plan (Details 4) (USD $)
12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Notes to Financial Statements    
Service cost-benefits earned during the period $ 67,443 $ 56,779
Interest cost on projected benefit obligation 96,512 103,211
Expected return on plan assets (82,055) (75,620)
Amortization of actuarial loss 131,230 36,173
Net periodic pension cost $ 213,130 $ 120,543