Net Income Per Share - Reconciliation of Net Income (Loss) Attributable to Common Stockholders to the Numerator in the Basic and Diluted Earnings Per Share Calculation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Net income (loss) attributable to Octave common stockholders	$ (98,404)	$ (59,282)	$ (24,551)
Adjustment to redemption value (ASC 480)	$ (18,175)	$ (5,222)	$ 4,792
Income (Loss) from Continuing Operations, Per Basic Share	$ (2.47)	$ (1.37)	$ (0.43)
Income (Loss) from Continuing Operations, Per Diluted Share	$ (2.47)	$ (1.37)	$ (0.43)
Numerator of basic and diluted EPS	$ (116,579)	$ (64,504)	$ (19,759)