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v3.19.3

Warrants (Details 1) - $ / shares | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Warrants [Abstract] |  |  |
Range of Exercise Prices | $ 0.25 | $ 0.25 |
Number Outstanding | 1,200,000 | 1,200,000 |
Weighted Average Remaining Contractual Life | 1 year 9 months | 2 years 3 months 8 days |
Weighted Average Exercise Price | $ 0.25 | $ 0.25 |

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- Definition Exercise price. + References No definition available. + Details
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Namespace Prefix: | olbg_
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Period Type: | duration

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- Definition Range of exercise prices warrants. + References No definition available. + Details
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Namespace Prefix: | olbg_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | olbg_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Weighted average remaining contractual life warrants. + References No definition available. + Details
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Namespace Prefix: | olbg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant