COMPUTATION OF NET INCOME PER COMMON SHARE - RECONCILIATION (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]
Net income attributable to The Pennant Group, Inc.	$ 2,980	$ 1,334
Add: net income attributable to noncontrolling interests	0	150
Net income	$ 2,980	$ 1,484
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted average shares outstanding for basic net income per share (in shares)	27,891	27,834
Plus: incremental shares from assumed conversion	1,982	0
Adjusted weighted average common shares outstanding for diluted income per share (in share)	29,873	27,834
Earnings Per Share, Basic and Diluted [Abstract]
Basic net income per share (in dollars per share)	$ 0.11	$ 0.05
Diluted net income per share (in dollars per share)	$ 0.10	$ 0.05