Stockholders' Equity - Schedule of Stock Options Activity (Details) - 2015 Equity Incentive Plan - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Number of Shares
Outstanding at the beginning (in shares)	6,882
Granted (in shares)	0
Exercised (in shares)	(7)
Forfeited (in shares)	(233)
Expired (in shares)	(39)
Outstanding at the end (in shares)	6,603	6,882
Expected to vest (in shares)	6,603
Exercisable (in shares)	2,298
Weighted Average Exercise Price
Outstanding at the beginning (in dollars per share)	$ 2.95
Granted (in dollars per share)	0
Exercised (in dollars per share)	2.38
Forfeited (in dollars per share)	2.21
Expired (in dollars per share)	28.17
Outstanding at the end (in dollars per share)	2.83	$ 2.95
Expected to vest (in dollars per share)	2.83
Exercisable (in dollars per share)	$ 4.00
Weighted Average Remaining Term
Weighted Average Remaining Term (in years)	8 years 7 months 17 days	9 years 2 months 26 days
Expected to vest (in years)	8 years 7 months 17 days
Exercisable (in years)	8 years 4 months 17 days
Aggregate Intrinsic Value
Outstanding	$ 0	$ 3,263
Expected to vest	0
Exercisable	$ 0