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10. RETIREMENT PLANS (Details) - Net pension cost (USD $)
12 Months Ended
Dec. 31, 2011
Net pension cost [Abstract]  
Service cost $ 123,360
Interest cost 625,322
Expected return on assets (626,365)
Amortization of unrecognized net loss 219,050
Amortization of unrecognized prior service cost 75,205
Net periodic pension cost $ 416,572