XML 77 R64.htm IDEA: XBRL DOCUMENT
v3.19.3

Note 16 - Subsequent Events (Details Textual) - USD ($) |  |  |  | 1 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 01, 2019 | May 15, 2018 | Mar. 06, 2018 | Oct. 25, 2019 | Sep. 30, 2019 | Sep. 30, 2018
Payments to Acquire Property, Plant, and Equipment, Total |  |  |  |  | $ 2,226,229 | $ 2,676,175
Subsequent Event [Member] | Bilboards in Missouri [Member] |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment, Total | $ 1,337,685 |  |  |  |  |
Business Combination, Amount Held Back and Disbursed | $ 380,547 |  |  |  |  |
Common Class A [Member] |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  | 3,137,768 | 3,300,000 |  |  |
Common Class A [Member] | Subsequent Event [Member] |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  | 7,400 |  |
Proceeds from Issuance of Common Stock, Net |  |  |  | $ 144,707 |  |

X
- Definition Represents the amount held back and disbursed in a business combination. + References No definition available. + Details
Name: | bomn_BusinessCombinationAmountHeldBackAndDisbursed
Namespace Prefix: | bomn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from the additional capital contribution to the entity, net of offering costs. + References No definition available. + Details
Name: | bomn_ProceedsFromIssuanceOfCommonStockNet
Namespace Prefix: | bomn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=bomn_BilboardsInMissouriMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |