Stockholders' Equity - Narrative (Details) $ / shares in Units, $ in Thousands			12 Months Ended
	Jan. 09, 2026 USD ($) shares	Sep. 26, 2025 USD ($) $ / shares	Dec. 31, 2025 USD ($) vote $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares
SHAREHOLDERS' EQUITY
Common stock, authorized (in shares) \| shares			66,000,000	66,000,000
Common shares, par value (in dollars per share) \| $ / shares			$ 0.0001	$ 0.0001
Change in fair value of warrants and equity related liabilities			$ 69	$ (924)
Notes receivable from stockholders			0	9,158
Proceeds from issuance of common stock under at-the-market offering			29,221	0
At the Market Offering Program
SHAREHOLDERS' EQUITY
Sale of stock, commission of gross sales price of shares entitled to agent, percent		2.00%
Offering costs			600
Sale of stock, available for issuance, shares			45,200
At the Market Offering Program \| Subsequent event
SHAREHOLDERS' EQUITY
Sale of stock, available for issuance, shares	$ 33,300
Notes Receivables from Stockholders
SHAREHOLDERS' EQUITY
Loss on interest receivables from promissory notes			400
Notes receivable from stockholders			0	9,200
Private And Public Warrants
SHAREHOLDERS' EQUITY
Convertible preferred stock warrants			1,200	1,300
Change in fair value of warrants and equity related liabilities			200	(600)
Sponsor locked-up shares
SHAREHOLDERS' EQUITY
Convertible preferred stock warrants			300	100
Change in fair value of warrants and equity related liabilities			$ (200)	$ (300)
Class A
SHAREHOLDERS' EQUITY
Common stock, authorized (in shares) \| shares			36,000,000	36,000,000
Common shares, par value (in dollars per share) \| $ / shares			$ 0.0001
Ordinary shares, votes per share \| vote			1
Class A \| At the Market Offering Program
SHAREHOLDERS' EQUITY
Sale of stock, price per share \| $ / shares		$ 0.0001
Sale of stock, consideration received on transaction		$ 75,000
Sale of stock, number of shares issued in transaction \| shares			547,260
Proceeds from issuance of common stock under at-the-market offering			$ 29,800
Class A \| At the Market Offering Program \| Subsequent event
SHAREHOLDERS' EQUITY
Sale of stock, consideration received on transaction	$ 11,700
Sale of stock, number of shares issued in transaction \| shares	328,030
Proceeds from issuance of common stock under at-the-market offering	$ 11,900
Offering costs	$ 200
Class B
SHAREHOLDERS' EQUITY
Common stock, authorized (in shares) \| shares			14,000,000	14,000,000
Common shares, par value (in dollars per share) \| $ / shares			$ 0.0001
Ordinary shares, votes per share \| vote			3
Class C
SHAREHOLDERS' EQUITY
Common stock, authorized (in shares) \| shares			16,000,000	16,000,000
Common shares, par value (in dollars per share) \| $ / shares			$ 0.0001

Better Home & Finance Holding Co 10-K