REVENUE - Narrative (Details) $ in Thousands	6 Months Ended	12 Months Ended
REVENUE - Narrative (Details) $ in Thousands	Jun. 30, 2025 USD ($) segment customer	Dec. 31, 2024 USD ($) customer	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Concentration Risk [Line Items]
Number of operating segments \| segment	1
Cash and temporary investments \| $	$ 31,821	$ 24,337	$ 23,816	$ 29,909
Accounts receivable \| Customer Concentration Risk \| Customer one
Concentration Risk [Line Items]
Number of customers \| customer	1	1
Concentration risk, percentage	10.50%	14.90%

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.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 275
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References + Details

MILLER INDUSTRIES INC /TN/ 10-Q