Share-Based Compensation - Narrative (Details) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Jan. 01, 2019 shares	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($)	Jan. 01, 2025 shares	Dec. 31, 2024 shares	Jan. 01, 2024 shares	Jan. 01, 2023 shares	Jan. 01, 2022 shares	Jan. 01, 2021 shares	Jan. 01, 2020 shares	Dec. 31, 2018 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares) \| shares		6,314,832		6,314,832			5,626,275
Number of options vested and exercisable (in shares) \| shares		1,128,035		1,128,035
Weighted average exercise price vested and exercisable (in dollars per share) \| $ / shares		$ 46.56		$ 46.56
Aggregate intrinsic value of options vested and exercisable		$ 10,400		$ 10,400
Intrinsic value of options exercised in period				$ 200	$ 3,500
Unrecognized compensation expense period for recognition (in years)				2 years 8 months 12 days
Unrecognized share-based compensation cost of unvested RSAs		2,894	$ 3,656	$ 8,513	10,858
Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense of stock options granted		9,700		9,700
Non-employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense of stock options granted		$ 1,600		$ 1,600
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares) \| shares		1,657,833		1,657,833			1,413,948
Vesting period (in years)				4 years
Employee Stock Option \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation cost of unvested RSAs				$ 4,200	5,600
Employee Stock Option \| Non-employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation cost of unvested RSAs				$ 500	500
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares) \| shares		332,651		332,651			295,705
Convertible conversion ratio		1		1
RSAs vested in period				$ 3,800	$ 4,800
Unrecognized share-based compensation cost		$ 10,700		$ 10,700
Employee unrecognized compensation expense, period for recognition (in years)				2 years 6 months
Minimum \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				1 year
Maximum \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				4 years
Remaining shares available under the 2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares) \| shares		2,255,945		2,255,945			2,068,033						1,500,000
Increase in common stock, shares authorized (in shares) \| shares	750,000					750,000		750,000	750,000	750,000	750,000	750,000
Common stock, capital shares reserved for future issuance, increase (decrease) (as a percent)	4.00%
Common shares reserved (in shares) \| shares		6,750,000		6,750,000

ESTABLISHMENT LABS HOLDINGS INC. 10-Q