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10. RETIREMENT PLANS (Detail) - Accrued Pension Costs (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Projected benefit obligation at beginning of the year $ 11,548,148  
Service cost 123,360 79,909
Interest cost 625,322 646,708
Actuarial (gain)/loss 296,751  
Benefits paid (12,593,581)  
Fair value of plan assets at beginning of year 8,028,855  
Employer contributions 5,038,632  
Actual return on plan assets (473,906)  
Benefits paid (12,593,581)  
Projected benefit obligation at beginning of the year   $ 11,548,148