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Note 11 - Commitments and Contingencies (Details Textual) - USD ($)	Sep. 29, 2025	Sep. 28, 2021	Jun. 03, 2024	May 29, 2024
Letter of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 474,229
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 475,000
Triple Pay Play Lawsuit [Member]
Litigation Settlement, Amount Awarded from Other Party	$ 115,000
Claim By KDHM, LLC Against Usio Output Solutions, Inc. [Member]
Loss Contingency, Damages Sought, Value		$ 317,000
Counterclaim By Usio Output Solutions, Inc. Against KDHM, LLC [Member]
Amount Failed to Disclose As Required		$ 305,000
Usio’s Motion for Reconsideration of Order Granting Plaintiff’s Supplemental Rule 166(g) [Member] | Letter of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 474,229

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount awarded from other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

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

X

- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	duration

X

- Definition

Amount failed to disclose as required in agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	usio_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=usio_TriplePayPlayLawsuitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=usio_CounterclaimByUsioOutputSolutionsIncAgainstKdhmLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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