CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2023		37,186
Beginning balance at Dec. 31, 2023	$ 38,147	$ 38	$ 468,015	$ (10)	$ (429,896)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under employee stock plans (in shares)		1,318
Common stock issued under employee stock plans	555	$ 1	554
Common stock withheld for employee taxes and other (in shares)		292
Common stock withheld for employee taxes and other	(1,093)		(1,093)
Common stock issued in connection with warrant exercises (in shares)		298
Common stock issued in connection with at-the-market offering, net of offering costs (in shares)		1,708
Common stock issued in connection with at-the-market offering, net of offering costs	4,501	$ 2	4,499
Stock-based compensation	8,502		8,502
Net loss	(37,384)				(37,384)
Foreign currency translation adjustment, net of income taxes	224			224
Ending balance (in shares) at Dec. 31, 2024		40,218
Ending balance at Dec. 31, 2024	13,452	$ 41	480,477	214	(467,280)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(46,367)
Ending balance at Jun. 30, 2025	3,482
Beginning balance (in shares) at Dec. 31, 2024		40,218
Beginning balance at Dec. 31, 2024	13,452	$ 41	480,477	214	(467,280)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under employee stock plans (in shares)		1,024
Common stock issued under employee stock plans	546		545
Common stock withheld for employee taxes and other (in shares)		(198)
Common stock withheld for employee taxes and other	(622)		(622)
Issuance of shares (in shares)		35,030
Common stock and pre-funded warrants issued in connection with registered direct offering and private placement, net of offering costs	125,640	$ 35	125,605
Common stock issued in connection with term loan amendments (in shares)		482
Common stock issued in connection with term loan amendments	873	$ 0	873
Common stock issued in connection with at-the-market offering, net of offering costs (in shares)		10,033
Common stock issued in connection with at-the-market offering, net of offering costs	29,006	$ 10	28,996
Common stock issued in connection with exercises of pre-funded warrants (in shares)		5,413
Common stock issued in connection with exercises of pre-funded warrants	54	$ 5	49
Common stock issued in connection with repurchase of convertible senior notes (in shares)		625
Common stock issued in connection with repurchase of convertible senior notes	3,162	$ 1	3,161
Stock-based compensation	6,878		6,878
Net loss	(111,732)				(111,732)
Foreign currency translation adjustment, net of income taxes	867			867
Ending balance (in shares) at Dec. 31, 2025		92,627
Ending balance at Dec. 31, 2025	$ 68,124	$ 93	$ 645,962	$ 1,081	$ (579,012)