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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Cash and cash equivalents, UDT | $ 33,479,519 | $ 29,848,798
Property, plant, and equipment, UDT | 59,569,202 | 47,635,907
Accumulated depreciation and amortization, UDT | 36,250,906 | 34,289,450
Accrued expenses, UDT | 7,592,842 | 5,540,163
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) | 6,749,913 | 6,554,746
Common stock, outstanding shares (in shares) | 6,749,913 | 6,554,746
UDT |  |
Cash and cash equivalents, UDT | 0 | 278,475
Property, plant, and equipment, UDT | 0 | 2,099,960
Accumulated depreciation and amortization, UDT | 0 | (1,448,928)
Accrued expenses, UDT | $ 0 | $ 14,400

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