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Inventories (Narrative) (Details) (USD $)
 6 Months Ended
Mar. 31, 2015
Inventories 1 $ 1,008,589cbak_InventoriesZeroTwoEightFiveOneZeroFmqwLDfPwZerogm
Inventories 2 0cbak_InventoriesZeroTwoEightFiveOneZeroRTwoLwMLfCMNwt
Inventories 3 $ 5,647,009cbak_InventoriesZeroTwoEightFiveOneZeroCZeroCgGfLFiveSevenHnZ
Inventories 4 0cbak_InventoriesZeroTwoEightFiveOneZeroqEightbQflDKyFourOnev