Derivative Financial Instruments - Fair value of derivatives (Details) - Forge Nano, Inc. - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Dec. 31, 2024
Derivative Financial Instruments
Derivative liability - conversion feature embedded in convertible debt			$ 393
Warrants issued in conjunction with the 2023 issuances of Series C preferred stock and long-term debt	$ 5,830	$ 5,624	6,264
Not designated as hedging instruments
Derivative Financial Instruments
Derivative liability - conversion feature embedded in convertible debt			393
Warrants issued in conjunction with the 2023 issuances of Series C preferred stock and long-term debt	5,830	5,624	6,264
Total derivatives not designated as hedging instruments	$ 5,830	$ 5,624	$ 6,657

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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+ Details