| **PLAN OF LIQUIDATION**                             | 3 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: - liquidate the assets and wind up the business of the Partnership;
- make liquidating distributions in cancellation of the BACs;
- dissolve the Partnership after the sale of all of the Partnership's assets; and
- 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 |