Loss 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				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator—Basic
Net loss	$ (8,892)	$ (48,907)	$ (19,568)	$ (9,878)	$ (57,799)	$ (29,446)
Less: (loss) income attributable to non-controlling interest	(135)		2,733		2,507	4,821
Net loss attributable to NCS Multistage Holdings, Inc.—Basic	(8,757)		(22,301)		(60,306)	(34,267)
Numerator—Diluted
Net loss	(8,892)	$ (48,907)	(19,568)	$ (9,878)	(57,799)	(29,446)
Less: (loss) income attributable to non-controlling interest	(135)		2,733		2,507	4,821
Net loss attributable to NCS Multistage Holdings, Inc.—Diluted	$ (8,757)		$ (22,301)		$ (60,306)	$ (34,267)
Denominator
Basic weighted average number of shares (in shares)	47,319,000		46,766,000		47,184,000	46,380,000
Diluted weighted average number of shares (in shares)	47,319,000		46,766,000		47,184,000	46,380,000
Loss per common share
Basic (in dollars per share)	$ (0.19)		$ (0.48)		$ (1.28)	$ (0.74)
Diluted (in dollars per share)	$ (0.19)		$ (0.48)		$ (1.28)	$ (0.74)
Potentially dilutive securities excluded as anti-dilutive	4,813,000		4,449,000		4,592,000	4,418,000