v2.4.0.8

Derivative Liability (Details Textual) (USD $) | 1 Months Ended | 0 Months Ended | 3 Months Ended | 12 Months Ended |  | 0 Months Ended | 3 Months Ended |  | 0 Months Ended | 3 Months Ended |  | 0 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended |  | 1 Months Ended |  |  | 0 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended |  | 0 Months Ended | 1 Months Ended |  | 3 Months Ended |  |  | 1 Months Ended | 0 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 29, 2013 | Jul. 12, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Sep. 30, 2012 Minimum [Member] | Jun. 30, 2013 Minimum [Member] | Dec. 31, 2012 Minimum [Member] | Sep. 30, 2013 Minimum [Member] Series Warrant [Member] | Sep. 30, 2013 Minimum [Member] Series B Warrrant [Member] | Sep. 30, 2013 Minimum [Member] Series C Warrrant [Member] | Sep. 30, 2013 Minimum [Member] Series D Warrrant [Member] | Sep. 30, 2013 Minimum [Member] Series E Warrrant [Member] | Sep. 30, 2012 Maximum [Member] | Jun. 30, 2013 Maximum [Member] | Dec. 31, 2012 Maximum [Member] | Sep. 30, 2013 Maximum [Member] Series Warrant [Member] | Sep. 30, 2013 Maximum [Member] Series B Warrrant [Member] | Sep. 30, 2013 Maximum [Member] Series C Warrrant [Member] | Sep. 30, 2013 Maximum [Member] Series D Warrrant [Member] | Sep. 30, 2013 Maximum [Member] Series E Warrrant [Member] | Apr. 08, 2013 Warrant [Member] | Sep. 30, 2012 Warrant [Member] | Apr. 30, 2013 Warrant [Member] | Sep. 30, 2013 Warrant [Member] | Jun. 30, 2013 Warrant [Member] | Mar. 31, 2013 Warrant [Member] | Dec. 31, 2012 Warrant [Member] | Sep. 30, 2012 Warrant [Member] | Jun. 30, 2013 Warrant [Member] | Jun. 30, 2012 Warrant [Member] | Aug. 29, 2013 Warrant [Member] Series C Warrrant [Member] | Sep. 30, 2013 Convertible Debt [Member] | Jun. 30, 2013 Convertible Debt [Member] | Jun. 20, 2013 Convertible Debt [Member] Level 2 [Member] | Dec. 21, 2012 Convertible Debt [Member] Level 2 [Member] | Aug. 29, 2013 Convertible Debt [Member] Level 2 [Member] | May 08, 2013 Licensors Warrants [Member] | Jun. 30, 2012 Licensors Warrants [Member] | Feb. 08, 2013 Broker Warrants [Member] | Dec. 06, 2012 Broker Warrants [Member] | Jul. 12, 2012 Broker Warrants [Member] | Aug. 29, 2013 Broker Warrants [Member] | Dec. 10, 2012 Broker Warrants [Member] | Dec. 12, 2012 Broker Warrants [Member] | Sep. 10, 2012 Broker Warrants [Member] | Aug. 24, 2012 Broker Warrants [Member] | Jul. 31, 2012 Broker Warrants [Member] | Jul. 20, 2012 Broker Warrants [Member] | Jun. 30, 2013 Broker Warrants [Member] | Dec. 21, 2012 Convertible Note Warrants[ [Member] | Dec. 21, 2012 Convertible Note Broker Warrants [Member] | Jun. 30, 2012 Convertible Note Broker Warrants [Member] | Aug. 29, 2013 Convertible Note Broker Warrants [Member] | Mar. 28, 2013 Convertible Note Broker Warrants [Member] | Jun. 20, 2013 August Convertible Note Offering [Member] | Mar. 28, 2013 Short-term Note [Member] | Sep. 24, 2012 Short-term Note [Member] Notes | Sep. 07, 2012 Short-term Note [Member] Notes | Sep. 30, 2013 Initial Closing [Member] Convertible Debt [Member] | Jun. 30, 2013 Initial Closing [Member] Convertible Debt [Member] | Sep. 30, 2013 Initial Closing [Member] Convertible Debt [Member] Series C Warrrant [Member] | Jul. 20, 2012 Second Closing [Member] Private Placement Offering [Member] | Jul. 31, 2012 Third Closing [Member] Private Placement Offering [Member] | Aug. 24, 2012 Fourth Closing [Member] Private Placement Offering [Member] | Sep. 10, 2012 Fifth Closing [Member] Private Placement Offering [Member] | Dec. 06, 2012 Sixth Closing [Member] Private Placement Offering [Member] | Dec. 10, 2012 Seventh Closing [Member] Private Placement Offering [Member] | Dec. 12, 2012 Eighth Closing [Member] Private Placement Offering [Member] | Feb. 08, 2013 Ninth Closing [Member] Private Placement Offering [Member]
Derivative Liability (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock reserved for future issuance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 68,263,946 |  |  |  |  |  |  |  | 33,764,706 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock repurchase |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 999,680 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of warrants cancelled |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 79,975 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of bridge loan converted in to Private Placement Offering |  | $ 1,925,030 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,925,030 |  |  |  |  |  |  |  |  |
Warrant exercisable term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years | 10 years | 5 years | 5 years | 5 years |  | 5 years | 5 years | 5 years | 5 years | 5 years | 5 years |  |  |  |  |  |  |  | 5 years | 5 years |  | 5 years |  |  | 5 years | 5 years | 5 years | 5 years | 5 years | 5 years | 5 years | 5 years
Number of bridge warrants received by bridge holder |  | 7,700,120 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of bridge note warrants exercisable at $0.25 per share |  | 3,850,060 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of bridge note warrants exercisable at $0.50 per share |  | 3,850,060 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Per share price of 3,850,060 Bridge Warrants |  | $ 0.25 |  |  | $ 0.01 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Per share price of another 3,850,060 Bridge Warrants |  | $ 0.50 |  |  | $ 0.015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, exercise price | 0.082 |  |  |  |  |  |  |  |  | 0.01 | 0.015 | 0.03 | 0.01 | 0.01 |  |  |  | 0.25 | 0.50 | 1 | 0.25 | 0.25 | 0.25 |  |  |  |  |  |  |  |  |  |  |  | 0.082 |  |  |  | 0.12 | 0.24 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.082 | 0.25 | 0.25 |  |  |  | 0.03 |  |  |  |  |  |  |  |
Number of common stock purchase due to issuance of warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale price of unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.25 |  |  |  |  |  |  |  |  |
Number of PPO units due to conversion of Bridge notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,700,120 |  |  |  |  |  |  |  |  |  |
Number of Investor warrants due to conversion of Bridge Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,700,120 |  |  |  |  |  |  |  |  |  |
Proceeds from private offering |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 125,000 |  |  | 31,000 | 409,980 | 125,000 | 20,000 | 150,000 | 50,000 | 25,000 | 50,000
Number of PPO units sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |  | 124,000 | 1,639,920 | 500,000 | 80,000 | 600,000 | 200,000 | 100,000 | 200,000
Description of private placement offering |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | If at any time during the two year period following the closing date the Company issues additional shares of Common Stock for a consideration per share less than $0.25 (the "Reduced Price"), then the Company will issue to the purchasers in the Offering, concurrently with such issue and without any additional consideration from the purchasers, the number of additional shares of the Company's common stock and Investor Warrants equal to the difference between (A) the purchase price of the PPO Units being subscribed for divided by the Reduced Price and (B) the number of shares of the Company's common stock included in the units being subscribed for in the Offering. |  |  |  |  |  |  |  |  |  |
Number of common stock consisting due to PPO |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 124,000 | 1,639,920 | 500,000 | 80,000 | 600,000 | 200,000 | 100,000 | 200,000
Number of investor warrants consisting due to PPO |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150,000 | 1,200,000 |  |  |  |  | 124,000 | 1,639,920 | 500,000 | 80,000 | 600,000 | 200,000 | 100,000 | 200,000
Exercise price of investor warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.13 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.00 |  |  | $ 1.00 | $ 1.00 | $ 1.00 | $ 1.00 | $ 1.00 | $ 1.00 | $ 1.00 | $ 1.00
Warrant issued during period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,500,000 |  |  |  |  |  |  |  | 11,664,040 |  |  |  |  |  |  |  | 16,000 | 72,000 | 656,010 |  | 72,000 | 72,000 | 187,514 | 187,514 | 187,514 | 187,514 |  |  | 1,600,000 |  | 9,058,824 |  | 752,126 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 | 2 |  |  |  |  |  |  |  |  |  |  |
Exercise price of broker warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.25 | $ 0.25 | $ 0.25 |  | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of note |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |  |  |
Fair value of the warrants |  |  | 113,091 |  | 7,252,283 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 42,625 | 3,788,688 | 210,349 | 113,091 | 1,067,196 |  | 888,596 | 0 |  |  |  |  |  | 491,051 | 663,528 | 25,827 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 57,143 | 60,886 |  |  |  | 9,482 |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible Note Warrants | 9,058,824 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,520,000 |  | 2,000,000 | 85,293 | 2,704,000 | 24,705,882 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected volatility rate |  |  | 65.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 65.00% | 70.00% | 55.00% |  | 55.00% | 55.00% | 60.00% |  |  |  |  |  |  | 55.00% | 60.00% | 1.90% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 55.00% | 65.00% |  | 55.00% | 70.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Risk free interest rate |  |  | 1.705% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.57% | 0.83% | 1.685% |  | 1.685% | 1.005% | 0.95% |  |  |  |  |  |  | 1.685% | 0.95% | 65.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.685% | 1.90% |  | 1.685% | 0.83% |  |  |  |  |  |  |  |  |  |  |  |  |
Expected term |  |  |  |  |  |  | 5 years | 18 months | 24 days |  |  |  |  |  | 10 years | 10 years | 5 years |  |  |  |  |  | 5 years |  | 5 years |  |  | 5 years |  |  |  |  |  |  |  | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years | 5 years |  | 5 years | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |
Expected dividend rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% | 0.00% |  | 0.00% | 0.00% | 0.00% |  |  |  |  |  |  | 0.00% | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% | 0.00% |  | 0.00% | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liability |  |  | 902,940 |  | 1,660,440 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,728,512 |  | 902,940 | 1,660,440 |  |  | 3,728,512 | 1,660,440 | 3,788,688 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liability gain |  |  | $ 870,591 | $ 60,176 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 60,176 |  |  |  | $ 850,591 | $ 5,411,959 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in warrants exercise price |  |  |  |  | 0.25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Broker warrants issued shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 851,549 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Number of bridge note warrants exercisable at given exercise price. + References No definition available. + Details
Name: | blbk_BridgeNoteWarrantsExercisableAtExercisePriceOne
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of bridge note warrants exercisable at given exercise price. + References No definition available. + Details
Name: | blbk_BridgeNoteWarrantsExercisableAtExercisePriceTwo
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Broker Warrants issued during the peroid. + References No definition available. + Details
Name: | blbk_BrokerWarrantsIssuedShares
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Class Of Right Or Warrant Issued During the Period + References No definition available. + Details
Name: | blbk_ClassOfRightOrWarrantIssuedDuringPeriod
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period in which class of warrant or right can be exercise. + References No definition available. + Details
Name: | blbk_ClassOfWarrantOrRightTermOfExercise
Namespace Prefix: | blbk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | blbk_DerivativeLiabilityTextualAbstract
Namespace Prefix: | blbk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of private placement offering. + References No definition available. + Details
Name: | blbk_DescriptionOfPrivatePlacementOffering
Namespace Prefix: | blbk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price of broker warrants. + References No definition available. + Details
Name: | blbk_ExercisePriceOfBrokerWarrants
Namespace Prefix: | blbk_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price of investor warrants. + References No definition available. + Details
Name: | blbk_ExercisePriceOfInvestorWarrants
Namespace Prefix: | blbk_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase in exercise price per share or per unit of warrants or rights outstanding. + References No definition available. + Details
Name: | blbk_IncreaseInClassOfWarrantOrRightExercisePriceOfWarrantsOrRights
Namespace Prefix: | blbk_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of bridge warrants received by bridge holder. + References No definition available. + Details
Name: | blbk_NumberOfBridgeWarrantsReceivedByBridgeHolder
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of common stock consisting due to PPO. + References No definition available. + Details
Name: | blbk_NumberOfCommonStockConsistingDueToPrivatePlacementOffering
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of common stock purchase due to issuance of warrants. + References No definition available. + Details
Name: | blbk_NumberOfCommonStockPurchaseDueToIssuanceOfWarrants
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of common stock repurchase. + References No definition available. + Details
Name: | blbk_NumberOfCommonStockRepurchase
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of investor warrants consisting due to PPO + References No definition available. + Details
Name: | blbk_NumberOfInvestorWarrantsConsistingDueToPrivatePlacementOffering
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of investor warrants due to conversion of bridge notes. + References No definition available. + Details
Name: | blbk_NumberOfInvestorWarrantsDueToConversionOfBridgeNotes
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of notes. + References No definition available. + Details
Name: | blbk_NumberOfNotes
Namespace Prefix: | blbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of private placement offering due to conversion of bridge notes. + References No definition available. + Details
Name: | blbk_NumberOfPrivatePlacementOfferingDueToConversionOfBridgeNotes
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of private placement offering units sold. + References No definition available. + Details
Name: | blbk_NumberOfPrivatePlacementOfferingUnitsSold
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants cancelled. + References No definition available. + Details
Name: | blbk_NumberOfWarrantsCancelled
Namespace Prefix: | blbk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Warrants exercisable price. + References No definition available. + Details
Name: | blbk_WarrantsExercisablePriceThree
Namespace Prefix: | blbk_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Warrants exercisable price. + References No definition available. + Details
Name: | blbk_WarrantsExercisablePriceTwo
Namespace Prefix: | blbk_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Short-Term financing which is expected to be paid back relatively quickly, such as by a subsequent longer-term loan. Also called swing loan or bridge financing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 + Details
Name: | us-gaap_BridgeLoan
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 4 -Article 4 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights
Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of warrants issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
Name: | us-gaap_DebtConversionConvertedInstrumentWarrantsOrOptionsIssued1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226000-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsExpectedDividendRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsExpectedTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsExpectedVolatilityRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Risk-free interest rate assumption used in valuing an instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssumptionsRiskFreeInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfPrivatePlacement
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfWarrants
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant