| **RELATED PARTY TRANSACTIONS (Tables)**             | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
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| **Related Party Transactions [Abstract]**           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| Schedule Of Gross Management Fee [Table Text Block] | The partnership  management fees accrued for the three months ended December 31,  2013 and 2012 are as follows:    2013  2012Series  1$        -$        -Series  2--Series  33,1807,465Series  4--Series  5--Series  6        -        - $    3,180$    7,465                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| Schedule Of Management Fees Paid [Table Text Block] | The  partnership management fees paid for the three months ended  December 31, 2013 and 2012 are as follows:    2013  2012Series  1  $       -  $       -Series  2--Series  3  311,638-Series  4--Series  5--Series  6         -         -   $ 311,638  $       -    The  partnership management fees paid for the nine months ended December  31, 2013 and 2012 are as follows:      2013  2012Series  1  $       -  $       -Series  2--Series  3  311,638-Series  4--Series  5--Series  6         -         -   $ 311,638  $       - |

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| - Definition
Tabular disclosure for gross management fee.
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No definition available.
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| - Definition
Tabular disclosure for management fees paid.
+ References
No definition available.
+ Details**Name:**bctc_ScheduleOfManagementFeesPaidTableTextBlock**Namespace Prefix:**bctc_**Data Type:**nonnum:textBlockItemType**Balance Type:**na**Period Type:**duration |
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| - Details**Name:**us-gaap_RelatedPartyTransactionsAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |