XML 43 R27.htm IDEA: XBRL DOCUMENT
v3.23.1

Note 2 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Notes Tables |
Property, Plant and Equipment, Useful Life [Table Text Block] |
|  | Years |
Structures |  |  | 15 |
Digital displays and electrical |  |  | 10 |
Static and tri-vision displays |  |  | 10 to 15 |
Fiber, towers, and broadband equipment |  |  | 5 to 20 |
Vehicles, equipment, and furniture |  |  | 4 to 7 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | Years |
Customer relationships |  |  | 10 to 15 |
Permits, licenses, and lease acquisition costs |  |  | 10 to 50 |
Noncompetition and nonsolicitation agreements |  |  | 5 |
Technology, trade names, and trademarks |  |  | 10 to 20 |
Site location |  |  | 15 |
Capitalized contract costs |  |  | 10 |

X
- Definition Tabular disclosure of the useful life for property, plant and equipment. + References No definition available. + Details
Name: | boc_PropertyPlantAndEquipmentUsefulLifeTableTextBlock
Namespace Prefix: | boc_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
Name: | us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration