| **TAXABLE LOSS**            | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                     |
|-----------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
||
| **Taxable Loss [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                               |
| Taxable Loss [Text Block]   | NOTE E - TAXABLE LOSS  The Partnership's taxable loss for the calendar year ended December 31, 2014 is expected to differ from its loss for financial reporting purposes. This is primarily due to accounting differences in depreciation incurred by the Operating Partnerships and also differences between the equity method of accounting and the IRS accounting methods. |

| X                                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**bctc_TaxableLossAbstract**Namespace Prefix:**bctc_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This item represents the expected change in the Partnership's taxable loss for financial reporting purposes. This is primarily due to accounting differences in depreciation incurred by the Operating Partnerships and also differences between the equity method of accounting and IRS accounting methods.
+ References
No definition available.
+ Details**Name:**bctc_TaxableLossTextBlock**Namespace Prefix:**bctc_**Data Type:**nonnum:textBlockItemType**Balance Type:**na**Period Type:**duration |