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Borrowings - Components (Q2) (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Oct. 22, 2024	Dec. 31, 2023	Dec. 31, 2021
Debt Instrument [Line Items]
Total Notes Payable	$ 55,050	$ 34,725		$ 9,545
Less: unamortized debt discount	(9,791)	(6,446)		(2,133)
Total Long-term Notes	$ 16,755	13,654		5,500
Notes payable \| Series 1 promissory notes
Debt Instrument [Line Items]
Total Notes Payable		725		1,911
Notes payable \| Related party notes
Debt Instrument [Line Items]
Total Notes Payable		$ 14,000		$ 1,000
Notes payable \| Minimum \| Series 1 promissory notes
Debt Instrument [Line Items]
Interest Rate				9.00%	9.00%
Notes payable \| Minimum \| Related party notes
Debt Instrument [Line Items]
Interest Rate		8.00%
Notes payable \| Maximum \| Series 1 promissory notes
Debt Instrument [Line Items]
Interest Rate				15.00%	12.00%
Notes payable \| Maximum \| Related party notes
Debt Instrument [Line Items]
Interest Rate		15.99%
Convertible debt \| Convertible debentures
Debt Instrument [Line Items]
Interest Rate	0.00%
Total Notes Payable	$ 28,172	$ 0
Convertible debt \| Term convertible notes
Debt Instrument [Line Items]
Interest Rate	3.94%
Total Notes Payable	$ 2,451	$ 0
Term loan \| WTI Facility
Debt Instrument [Line Items]
Interest Rate	13.50%	13.50%	13.50%
Total Notes Payable	$ 20,000	$ 20,000		$ 0
Nonrelated party
Debt Instrument [Line Items]
Less: current portion of notes	$ (27,502)	(625)		(912)
Nonrelated party \| Notes payable \| Series 1 promissory notes
Debt Instrument [Line Items]
Interest Rate	15.00%
Total Notes Payable	$ 425	$ 725
Nonrelated party \| Notes payable \| Minimum
Debt Instrument [Line Items]
Interest Rate		12.00%
Nonrelated party \| Notes payable \| Minimum \| Series 1 promissory notes
Debt Instrument [Line Items]
Interest Rate		12.00%
Nonrelated party \| Notes payable \| Maximum
Debt Instrument [Line Items]
Interest Rate		15.00%
Nonrelated party \| Notes payable \| Maximum \| Series 1 promissory notes
Debt Instrument [Line Items]
Interest Rate		15.00%
Related party
Debt Instrument [Line Items]
Less: current portion of notes		$ (14,000)		$ (1,000)
Related party \| Notes payable \| Related party notes
Debt Instrument [Line Items]
Total Notes Payable	0	14,000
Less: current portion of notes	0	$ (14,000)
Related party \| Notes payable \| Minimum \| Related party notes
Debt Instrument [Line Items]
Interest Rate		8.00%
Related party \| Notes payable \| Maximum \| Related party notes
Debt Instrument [Line Items]
Interest Rate		15.99%
Related party \| Convertible debt \| Related party convertible notes
Debt Instrument [Line Items]
Total Notes Payable	4,002	$ 0
Less: current portion of notes	$ (1,002)	$ 0
Related party \| Convertible debt \| Minimum \| Related party convertible notes
Debt Instrument [Line Items]
Interest Rate	3.94%
Related party \| Convertible debt \| Maximum \| Related party convertible notes
Debt Instrument [Line Items]
Interest Rate	15.00%