SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 42,694	$ 81,808
Restricted cash	3,075	1,549
Cash, Cash Equivalents and Restricted Cash	45,769	83,357	$ 96,490	$ 20,229
Cash Balance Associated With Provider Relief Fund		58,000
Asana Hospice Acquisition [Member]
Cash and Cash Equivalents [Line Items]
Restricted cash		$ 1,500
Various Acquisitions [Member]
Cash and Cash Equivalents [Line Items]
Restricted cash	$ 3,100