DEBT - Narrative (Details) $ in Thousands							12 Months Ended
DEBT - Narrative (Details) $ in Thousands	Mar. 03, 2025 USD ($)	May 17, 2024 USD ($)	Apr. 24, 2024 USD ($)	Oct. 31, 2023 SGD ($)	Aug. 16, 2023 USD ($)	Apr. 08, 2019 AUD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Jun. 28, 2024 USD ($)
Short-Term Debt [Line Items]
Short-term debt							$ 8,473	$ 0
Restricted cash, non-current							1,322	180
Revolving Credit Facility \| Line of Credit
Short-Term Debt [Line Items]
Short-term debt							6,559
Revolving Credit Facility - Austin ADT \| Revolving Credit Facility \| Line of Credit
Short-Term Debt [Line Items]
Short-term debt							1,205
Revolving Credit Facility - Premier EBGL \| Revolving Credit Facility
Short-Term Debt [Line Items]
Line of credit facility, maximum borrowing capacity					$ 6,000
Borrowing capacity							1,813
Restricted cash							600
Revolving Credit Facility - Premier EBGL \| Revolving Credit Facility \| Line of Credit
Short-Term Debt [Line Items]
Debt instrument, basis spread on variable rate (as percent)					0.50%
Debt service coverage ratio (less than)					1.25
Debt to equity ratio (in excess of)					1.65
Fixed charge coverage ratio (less than)					1.10
Working capital					$ 2,000
Current ratio					1.50
Short-term debt							3,969
Revolving Credit Facility - Premier EBGL \| Revolving Credit Facility \| Line of Credit \| Minimum
Short-Term Debt [Line Items]
Debt instrument, basis spread on variable rate (as percent)					6.75%
KeyBank Facility \| Revolving Credit Facility \| Line of Credit
Short-Term Debt [Line Items]
Short-term debt							0
Bridgewater Facility
Short-Term Debt [Line Items]
Restricted cash, non-current		$ 1,000					500
Bridgewater Facility \| Secured Debt
Short-Term Debt [Line Items]
Debt instrument, face amount		$ 7,000
Debt instrument, basis spread on variable rate (as percent)		7.85%
Cash flow to fixed charge coverage ratio		1.30
Senior funded debt to adjusted EBITDA ratio		3.00
Total funded debt to adjusted EBITDA ratio		4.00
NAB Facility Agreement \| Line of Credit
Short-Term Debt [Line Items]
Line of credit facility, maximum borrowing capacity						$ 4,000,000
Debt instrument, basis spread on variable rate (as percent)						1.60%
Debt instrument, termination of debt notice (in days)						90 days
Long-term debt, net of current portion							0
Interest expense							$ 32	17
Number of times EBITDA must be paid						2
Tangible assets, minimum						$ 2,500,000
Tangible net worth, minimum (as percent)							25.00%
HSBC Facility Agreement \| Line of Credit
Short-Term Debt [Line Items]
Line of credit facility, maximum borrowing capacity				$ 1,000,000
Debt instrument, basis spread on variable rate (as percent)						3.50%
Interest expense								$ 6
Debt instrument, term (in days)				60 days
Alliance Drilling Tools, LLC (ADT) \| Revolving Credit Facility - Austin ADT
Short-Term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 3,000
Alliance Drilling Tools, LLC (ADT) \| Revolving Credit Facility - Austin ADT \| Secured Debt
Short-Term Debt [Line Items]
Debt instrument, face amount	$ 800						$ 638
Debt instrument, basis spread on variable rate (as percent)	1.75%
Debt instrument, monthly payment	$ 13
KBS Builders, Inc. (KBS) \| KeyBank Facility
Short-Term Debt [Line Items]
Line of credit facility, maximum borrowing capacity			$ 4,000
Debt instrument, basis spread on variable rate (as percent)			3.00%
KBS Builders, Inc. (KBS) \| KeyBank Facility \| Minimum
Short-Term Debt [Line Items]
Operating cash flow to total fixed charges ratio			1.25
106 Bremer, LLC \| Subsidiaries
Short-Term Debt [Line Items]
Sale of real estate, consideration									$ 3,000
106 Bremer, LLC \| Term Loan Secured by Mortgage \| Secured Debt \| Subsidiaries
Short-Term Debt [Line Items]
Interest percentage									7.50%

Star Equity Holdings, Inc. 10-K