Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Nov. 30, 2025	Jul. 31, 2025	Dec. 31, 2019	Dec. 31, 2017
Stock-based compensation
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Stock Options
Stock-based compensation
Options expiration period (in years)	10 years
Granted (in dollars per share)	$ 5.85	$ 14.43	$ 10.63
Intrinsic value of stock options exercised	$ 0.0	$ 1.9	$ 1.9
Stock Options | Tranche One
Stock-based compensation
Vesting period (in years)	4 years
Vesting percentage 1 (as a percent)	25.00%
Stock Options | Tranche Two
Stock-based compensation
Vesting period (in years)	3 years
Vesting percentage 1 (as a percent)	75.00%
Restricted Stock Units (RSUs)
Stock-based compensation
Granted (in dollars per share)	$ 7.76	$ 21.51	$ 15.90
Aggregate fair value of restricted stock awards	$ 13.0	$ 10.3	$ 10.4
Restricted stock units and stock options
Stock-based compensation
Total unrecognized compensation cost related to unvested stock awards	$ 30.7
Period of recognition of unrecognized compensation cost	2 years 6 months
2017 Plan
Stock-based compensation
Shares authorized under the plan (in shares)							1,000,000.0
Annual increase in the shares available for grant under the plan (as a percent of shares of common stock outstanding)	4.00%
Shares outstanding (in shares)	6,200,000
Shares available for grant under the plan (in shares)	4,900,000
2017 Plan | Stock Options
Stock-based compensation
Shares authorized under the plan (in shares)							2,500,000
2017 ESPP
Stock-based compensation
Shares authorized under the plan (in shares)						600,000
Annual increase in the shares available for grant under the plan (as a percent of shares of common stock outstanding)						1.00%
Shares available for grant under the plan (in shares)	1,900,000
Employee stock purchase plan (in shares)	200,000	100,000	100,000
Inducement Plan
Stock-based compensation
Shares authorized under the plan (in shares)					500,000
2021 Akoya Equity Incentive Plan | Restricted Stock Units (RSUs)
Stock-based compensation
Shares authorized under the plan (in shares)					200,000
Akoya Inducement Plan | Restricted Stock Units (RSUs)
Stock-based compensation
Shares authorized under the plan (in shares)					300,000
2025 Inducement Plan
Stock-based compensation
Common stock, issuance (in shares)				900,000
Common stock, par value (in dollars per share)				$ 0.001