(Loss) Earnings Per Common Share (Reconciliation of Numerator and Denominator for Calculating (loss) Earnings Per Share from Net (loss) Income) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator—Basic
Net loss	$ (48,907)	$ (9,878)
Less: income attributable to non-controlling interest	2,642	2,088
Net loss attributable to NCS Multistage Holdings, Inc.—Basic	(51,549)	(11,966)
Numerator—Diluted
Net loss	(48,907)	(9,878)
Less: income attributable to non-controlling interest	2,642	2,088
Net loss attributable to NCS Multistage Holdings, Inc.—Diluted	$ (51,549)	$ (11,966)
Denominator
Basic weighted average number of shares (in shares)	47,049,000	45,974,000
Diluted weighted average number of shares (in shares)	47,049,000	45,974,000
Loss per common share
Basic (in dollars per share)	$ (1.10)	$ (0.26)
Diluted (in dollars per share)	$ (1.10)	$ (0.26)
Potentially dilutive securities excluded as anti-dilutive	4,370,000	4,391,000