| **PLAN OF LIQUIDATION**                             | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
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| **Plan Of Liquidation [Abstract]**                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| Liquidation Of Partnership Description [Text Block] | NOTE G  - PLAN OF LIQUIDATION On March  13, 2007, our General Partner recommended that the BAC holders  approve a plan of liquidation and dissolution for the Partnership,  or the "Plan." The Plan was approved by the BAC holders on April  27, 2007, and was adopted by the General Partner on April 30, 2007.  Pursuant to the Plan, the General Partner may, without further  action by the BAC holders:     o  liquidate the assets and wind up the business of the  Partnership;  omake  liquidating distributions in cancellation of the BACs;  o  dissolve the Partnership after the sale of all of the Partnership's  assets; and  o  take, or cause the Partnership to take, such other acts and deeds  and shall do, or cause the Partnership to do, such other things, as  are necessary or appropriate in connection with the dissolution,  winding up and liquidation of the Partnership, the termination of  the responsibilities and liabilities of the Partnership under  applicable law, and the termination of the existence of the  Partnership.   Since the  approval of the Plan by the BAC holders, we have continued to seek  to sell the assets of the Partnership and use the sales proceeds  and/or other Partnership funds to pay all expenses in connection  with such sales, pay or make provision for payment of all  Partnership obligations and liabilities, including accrued fees and  unpaid loans to the General Partner, and distribute the remaining  assets as set forth in the Partnership Agreement. We expected to  complete the sale of the apartment complexes approximately three to  four years after the BAC holders' approval of the Plan, which was  April 27, 2007. However, the liquidation has taken longer than  expected and the final liquidating distribution will occur months  after all of the apartment complexes have been sold. As liquidation  is not imminent, the Partnership will continue to report as a going  concern.   A special  allocation of net loss between the assignees and general partner  has been made due to the liquidation of assets and the wind up of  the business of certain series.   For  additional information regarding the sale of Partnership assets,  see "Management's Discussion and Analysis of Financial Condition  and Results of Operations " in our Annual Report on Form  10-K. |

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| - Definition
This item represents the plan of liquidation and dissolution of the partnership business. It includes all the activities in connection with the dissolution, winding up and liquidation of the Partnership, the termination of the responsibilities and liabilities of the Partnership under applicable law, and the termination of the existence of the Partnership.
+ References
No definition available.
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| - Details**Name:**bctc_PlanOfLiquidationAbstract**Namespace Prefix:**bctc_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |