Ascent Industries Co. Quarterly report [Sections 13 or 15(d)]

Leases - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended			6 Months Ended
Leases - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Apr. 04, 2025	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Lessee, Lease, Description [Line Items]
Gain on lease modification		$ 500	$ 0		$ 544	$ 0	$ 544
Operating lease liability related to sale leaseback transactions			$ 11,400			$ 11,400
Sale leaseback liabilities as a percentage of total operating lease liabilities			89.00%			89.00%
Fifth Amended And Restated Master Lease Agreement
Lessee, Lease, Description [Line Items]
Increase (decrease) operating lease right-of-use asset		(6,500)
Increase (decrease) in operating lease liability		$ (7,000)
Sixth Amended And Restated Master Lease Agreement
Lessee, Lease, Description [Line Items]
Increase (decrease) operating lease right-of-use asset	$ (4,000)
Increase (decrease) in operating lease liability	$ (4,000)
Seventh Amended And Restated Master Lease Agreement
Lessee, Lease, Description [Line Items]
Increase (decrease) operating lease right-of-use asset				$ (5,500)
Increase (decrease) in operating lease liability				(7,200)
Gain on lease modification				$ 1,700