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Supplemental disclosure of cash flow information
 12 Months Ended
Dec. 31, 2012
Supplemental Cash Flow Elements [Abstract]  
Cash Flow, Supplemental Disclosures [Text Block]

21. Supplemental disclosure of cash flow information

 

    Year Ended December 31,  
    2012     2011     2010  
Interest paid in cash, net of capitalized interest of $246,851 in 2011   $ 670,042     $ 962,744     $ 1,381,829  
                         
Non-cash transactions:                        
Transfers between inventory and property plant and equipment, net   $ 508,107     $ (100,000 )   $ -  
Note received for plant facility sold   $ -     $ -     $ 3,670,963  
Issuance of 21,686, 11,158 and 8,565, respectively, of common stock for services rendered   $ 175,313     $ 104,443     $ 119,997  
Issuance of 10,033, 7,455 and 5,379, respectively, of redeemable preferred stock for services rendered   $ 77,856     $ 65,902     $ 67,130  
Conversion of 2,629, 2,145 and 4,950,  respectively, of redeemable preferred stock to common stock   $ 1,577     $ 1,287     $ 2,970  
Dividends declared but not paid   $ 1,096,746     $ 1,094,334     $ 1,092,913