NATURE OF OPERATIONS AND PRESENTATION OF FINANCIAL STATEMENTS (Details) $ / shares in Units, $ in Thousands	Feb. 03, 2020 shares	Aug. 06, 2019 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) location $ / shares	Dec. 31, 2018 USD ($) $ / shares
Business Acquisition [Line Items]
Common stock, par value (in dollars per share) | $ / shares			$ 0.0001	$ 0.0001
Principal amount of debt | $			$ 1,286,496	$ 539,375
OptionCare Enterprises, Inc.
Business Acquisition [Line Items]
Shares converted in merger (in shares)		542,261,567
Common stock, par value (in dollars per share) | $ / shares		$ 0.0001
Additional shares issued (in shares)		28,193,428
Ownership retained by shareholders after merger		19.20%
Number of service locations | location			115
Preferred Stock and Certain Warrants | OptionCare Enterprises, Inc.
Business Acquisition [Line Items]
Shares repurchased | $		$ 125,800
Preferred Stock and Certain Warrants | Common Stock | OptionCare Enterprises, Inc.
Business Acquisition [Line Items]
Additional shares issued (in shares)		3,458,412
HC Group Holdings I, LLC | OptionCare Enterprises, Inc.
Business Acquisition [Line Items]
Percentage of the combined company held		80.80%
Senior Notes | First Lien Term Loan
Business Acquisition [Line Items]
Principal amount of debt | $		$ 575,000
Legacy Health Systems
Business Acquisition [Line Items]
Ownership interest			50.00%
Subsequent Event | OptionCare Enterprises, Inc.
Business Acquisition [Line Items]
Shares converted in merger (in shares)	135,565,392
Additional shares issued (in shares)	7,048,357
Subsequent Event | Preferred Stock and Certain Warrants | Common Stock | OptionCare Enterprises, Inc.
Business Acquisition [Line Items]
Additional shares issued (in shares)	864,603