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Note 18- Management Incentive Bonus Plan (Details Textual) - USD ($)		12 Months Ended
	Jan. 10, 2022	Dec. 31, 2021	Dec. 31, 2020
Labor and Related Expense		$ 34,245,526	$ 13,041,388
Accounts Payable and Accrued Liabilities [Member]
Deferred Compensation, Bonus Payment		$ 15,000,000
Subsequent Event [Member]
Bonus Awarded, Chief Executive Officer	$ 7,500,000
Labor and Related Expense	$ 15,000,000

X

- Definition

Represents the amount of bonus awarded to a chief executive officer during the reporting period.

+ References

No definition available.

+ Details

Name:	bomn_BonusAwardedChiefExecutiveOfficer
Namespace Prefix:	bomn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of bonus payment under deferred compensation.

+ References

No definition available.

+ Details

Name:	bomn_DeferredCompensationBonusPayment
Namespace Prefix:	bomn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(b)(4))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_AccountsPayableAndAccruedLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: