COMPUTATION OF NET INCOME PER COMMON SHARE - RECONCILIATION (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]
Net income attributable to The Pennant Group, Inc.	$ 2,546	$ 15,684	$ 9,867
Add: net income attributable to noncontrolling interests	629	595	160
Net income	$ 3,175	$ 16,279	$ 10,027
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted average shares outstanding for basic net income per share (in shares)	27,838	27,834	27,834
Plus: incremental shares from assumed conversion	1,748	0	0
Adjusted weighted average common shares outstanding for diluted income per share (in share)	29,586	27,834	27,834
Earnings Per Share, Basic and Diluted [Abstract]
Basic net income per share (in dollars per share)	$ 0.11	$ 0.58	$ 0.36
Diluted net income per share (in dollars per share)	$ 0.11	$ 0.58	$ 0.36