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Note 12 - Concentration of Credit Risk and Significant Customers (Details Textual) Pure in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Customer Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member] |  |
Number of Major Customers | 0 | 0

X
- Definition Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc. + References No definition available. + Details
Name: | usio_NumberOfMajorCustomers
Namespace Prefix: | usio_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_RevenueFromContractWithCustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |