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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Dec. 31, 2011
Dec. 31, 2010
Cash and cash equivalents, UDT $ 29,848,798 $ 22,102,634
Property, plant, and equipment, UDT 47,635,907 45,457,275
Accumulated depreciation and amortization, UDT 34,289,450 32,882,135
Accrued taxes and other expenses, UDT 5,540,163 6,679,381
Current installments of long-term debt, UDT 580,661 654,331
Long-term debt, excluding current installments, UDT 5,638,658 6,846,947
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, Authorized shares (in shares) 1,000,000 1,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, Authorized shares (in shares) 20,000,000 20,000,000
Common stock, issued shares (in shares) 6,554,746 6,338,829
Common stock, outstanding shares (in shares) 6,554,746 6,338,829
UDT
    
Cash and cash equivalents, UDT 278,475 277,698
Property, plant, and equipment, UDT 2,099,960 2,756,792
Accumulated depreciation and amortization, UDT (1,448,928) (1,640,818)
Accrued taxes and other expenses, UDT 14,400 12,900
Current installments of long-term debt, UDT 0 39,246
Long-term debt, excluding current installments, UDT $ 0 $ 627,629