Ascent Industries Co. Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments - Summary of Changes in Fair Value of Company's Earn-Out Liability (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Earn-out payments during the period	$ 863	$ 190
Level 3 Inputs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at December 31, 2019	9,154
Earn-out payments during the period	(1,155)
Changes in fair value during the period	4
Balance at March 31, 2020	8,003
MUSA-Stainless \| Level 3 Inputs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at December 31, 2019	2,403
Earn-out payments during the period	(476)
Changes in fair value during the period	27
Balance at March 31, 2020	1,954
MUSA-Galvanized \| Level 3 Inputs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at December 31, 2019	1,782
Earn-out payments during the period	(167)
Changes in fair value during the period	70
Balance at March 31, 2020	1,685
American Stainless \| Level 3 Inputs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at December 31, 2019	4,969
Earn-out payments during the period	(512)
Changes in fair value during the period	(93)
Balance at March 31, 2020	$ 4,364