Significant Accounting Policies - Accounts Receivable and Revenue Recognition (Details) - Forge Nano, Inc. $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2026 USD ($) customer segment item	Dec. 31, 2025 USD ($) customer segment item	Dec. 31, 2024 USD ($) customer
Significant Accounting Policies
Allowance for credit loss, percentage	2.00%	2.00%
Payment term	30 days	30 days
Reporting units \| segment	3	3
Goodwill. \| $	$ 3,124	$ 3,124	$ 3,124
Impairment loss on goodwill \| $		$ 0	$ 0
Accounts receivable \| Customer concentration \| Three customers
Significant Accounting Policies
Number of customers	3	3
Concentration risk, percentage	74.00%	65.00%
Accounts receivable \| Customer concentration \| Five customers
Significant Accounting Policies
Number of customers			5
Concentration risk, percentage			60.00%
Revenue \| Customer concentration \| Three customers
Significant Accounting Policies
Number of customers \| item	3
Concentration risk, percentage	67.00%
Revenue \| Customer concentration \| Four customers
Significant Accounting Policies
Number of customers \| item		4
Concentration risk, percentage		69.00%
Revenue \| Customer concentration \| Two customers
Significant Accounting Policies
Number of customers		2	2
Concentration risk, percentage		25.00%	27.00%

Allowance for credit loss calculated as percentage of total receivables.

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