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Property, Plant and Equipment, net, Prepaid Land Use Rights, net and Intangible Assets, net (Tables)
 6 Months Ended
Mar. 31, 2013
SCHEDULE OF PROPERTY, PLANT AND EQUIPMENT [Table Text Block]
      September 30,     March 31,  
      2012     2013  
  Buildings $ 115,034,342   $ 111,718,629  
  Machinery and equipment   168,947,314     168,796,297  
  Office equipment   2,624,137     2,668,477  
  Motor vehicles   1,486,337     1,558,017  
      288,092,130     284,741,420  
  Accumulated depreciation   (102,766,292 )   (113,590,590 )
  Construction in progress   51,714,066     71,104,788  
  Prepayment for acquisition of property, plant and equipment   1,717,991     4,448,084  
               
  Carrying amount $ 238,757,895   $ 246,703,702  
SCHEDULE OF DEPRECIATION EXPENSE [Table Text Block]
    Three months ended March 31,     Six months ended March 31,  
    2012     2013     2012     2013  
Cost of revenues $ 3,703,196   $ 3,452,718   $ 7,411,674   $ 7,394,523  
Research and development expenses   149,438     143,699     289,785     280,416  
Sales and marketing expenses   43,096     34,271     86,861     66,853  
General and administrative   817,095     809,784     1,639,477     1,616,449  
expenses                        
  $ 4,712,825   $ 4,440,472   $ 9,427,797   $ 9,358,241  
SCHEDULE OF PREPAID LAND USE RIGHTS [Table Text Block]
             
    September 30,     March 31,  
    2012     2013  
             
Prepaid land use rights $ 36,977,372   $ 37,442,597  
Accumulated amortization   (4,473,511 )   (4,690,061 )
  $ 32,503,861   $ 32,752,536  
SCHEDULE OF INTANGIBLE ASSETS [Table Text Block]
    September 30,     March 31,  
    2012     2013  
             
Trademarks, computer software and technology $ 1,073,138   $ 1,422,468  
Less: Accumulated amortization   (445,075 )   (1,195,678 )
  $ 628,063   $ 226,790