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Deferred Revenue (Narrative) (Details)
12 Months Ended
Sep. 30, 2014
USD ($)
Y
Sep. 30, 2014
CNY
Deferred Revenue 1 $ 9,200,000cbak_DeferredRevenueZeroTwoSixFiveZeroThreeOneThreeFiveTyZvGBhVhrsp  
Deferred Revenue 2   56,000,000cbak_DeferredRevenueZeroTwoSixFiveZeroThreeOneThreeFiveWzTThreeTMQSixPcThreeM
Deferred Revenue 3 35cbak_DeferredRevenueZeroTwoSixFiveZeroThreeOneThreeFiveFourZeroTSixFourKMOneCKSZero 35cbak_DeferredRevenueZeroTwoSixFiveZeroThreeOneThreeFiveFourZeroTSixFourKMOneCKSZero
Deferred Revenue 4 7,560,386cbak_DeferredRevenueZeroTwoSixFiveZeroThreeOneThreeFivehSevencgTwogmSevenkwNines  
Deferred Revenue 5 346,509cbak_DeferredRevenueZeroTwoSixFiveZeroThreeOneThreeFiveFiveVNineZeroSixhTttgJp  
Deferred Revenue 6 7,520,000cbak_DeferredRevenueZeroTwoSixFiveZeroThreeOneThreeFiveXFVHVvFivewLVSixl  
Deferred Revenue 7   46,150,000cbak_DeferredRevenueZeroTwoSixFiveZeroThreeOneThreeFivevxMKHRZeroyRRThreeB