Note 6 - Related Party Transactions (Details Textual) - USD ($)	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Prepaid Expenses, Related Party, Current	$ 36,700	$ 36,700
G2 and IPA [Member]
Prepaid Expenses, Related Party, Current	$ 36,700		$ 36,700

Amount of asset related to consideration paid in advance for costs that provide economic benefits to related parties within a future period of one year or the normal operating cycle, if longer.

No definition available.

Name:	blbx_PrepaidExpensesRelatedPartyCurrent
Namespace Prefix:	blbx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant