Summary of Significant Accounting Policies (Details) $ in Thousands	1 Months Ended		12 Months Ended
	Oct. 31, 2025	Jul. 31, 2016	Dec. 31, 2025 USD ($) segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Significant accounting policies
Number of reportable segments | segment			1
Number of reporting unit | segment			1
Goodwill impairment loss			$ 0	$ 0	$ 0
Cylinder deposit liability			22,438	19,426
Contract term	5 years	5 years
Renewal term	5 years	5 years
Management services revenue			246,614	237,118	289,025
Federal
Significant accounting policies
Operating loss carryforwards			0	0
State
Significant accounting policies
Operating loss carryforwards			900
Management Service
Significant accounting policies
Management services revenue			$ 2,900	$ 2,300	$ 2,400
Customer Concentration Risk | United States Defense Logistics Agency | Revenue from Contract with Customer
Significant accounting policies
Concentration risk percentage			10.00%	10.00%	10.00%
Revenues			$ 38,200	$ 35,500	$ 53,000
Customer Concentration Risk | United States Defense Logistics Agency | Accounts Receivable
Significant accounting policies
Concentration risk percentage			10.00%	10.00%
Accounts receivable			$ 4,300	$ 3,500