Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6676-107765

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4531-111522

+ Details

Name:	us-gaap_AccountsReceivableNetCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The aggregate cost of goods produced and sold and services rendered during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of a reclassification adjustment made to prior period financial statement amounts.

+ References

No definition available.

+ Details

Name:	us-gaap_PriorPeriodReclassificationAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Average Daily Processing Volume Increase (Decrease)

+ References

No definition available.

+ Details

Name:	usat_AverageDailyProcessingVolumeIncreaseDecrease
Namespace Prefix:	usat_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Unusual Or Infrequent Item, Or Both, Senior Leadership Team, Salary Decrease, Percentage

+ References

No definition available.

+ Details

Name:	usat_UnusualOrInfrequentItemOrBothSeniorLeadershipTeamSalaryDecreasePercentage
Namespace Prefix:	usat_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Unusual Or Infrequent Item, Or Both, Temporary Furlough, Percentage Of Employee Base

+ References

No definition available.

+ Details

Name:	usat_UnusualOrInfrequentItemOrBothTemporaryFurloughPercentageOfEmployeeBase
Namespace Prefix:	usat_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_ProductMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis=usat_EquipmentSupplierBillAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

BUSINESS - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended
BUSINESS - Narrative (Details) - USD ($) $ in Thousands	Mar. 15, 2020	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Average daily processing volume increase (decrease)	(40.00%)	53.00%
Senior leadership team salary decrease, percentage		20.00%
Temporary furlough, percentage of employee base		10.00%
Prior period reclassification adjustment		$ 800
Cost of equipment sales, decrease		22,637	$ 31,943
Accounts receivable, increase		19,175		$ 17,273
Product
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of equipment sales, decrease		3,301	$ 9,854
Equipment Supplier Bill Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable, increase		800
Equipment Supplier Bill Adjustment \| Product
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of equipment sales, decrease		$ (800)