SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information7 (Details) $ / shares in Units, $ in Thousands			12 Months Ended
	Nov. 05, 2019 USD ($) shares	Feb. 01, 2018 USD ($) shares	Dec. 31, 2023 USD ($) investment jointVenture	Oct. 06, 2023 $ / shares shares	Oct. 11, 2019 shares	Jan. 01, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Number of investments | investment			3
Number of unconsolidated joint ventures | jointVenture			13
Dignity Health | Minimum | Joint Venture | Glendale Advanced Imaging
Property, Plant and Equipment [Line Items]
Economic interest			35.00%
Dignity Health | Maximum | Joint Venture | Glendale Advanced Imaging
Property, Plant and Equipment [Line Items]
Economic interest			55.00%
Series C Preferred Stock
Property, Plant and Equipment [Line Items]
Preferred stock (in shares ) | shares				20,325,203
Exchange rate In dollars per share) | $ / shares				$ 0.123
Medic Vision
Property, Plant and Equipment [Line Items]
Total net assets			$ 1,200
Equity interest percentage			14.21%
Turner Imaging Systems
Property, Plant and Equipment [Line Items]
Shares purchased (in shares) | shares		2,100,000
Investment at cost		$ 2,000
Preferred stock issued upon conversion (in shares) | shares					80,000
Turner Imaging Systems | Promissory note
Property, Plant and Equipment [Line Items]
Short-term debt						$ 100
WhiteRabbit.ai Inc.
Property, Plant and Equipment [Line Items]
Investment at cost	$ 1,000
Shares acquired (in shares) | shares	2,315,350
Equity investment loan to company outstanding	$ 2,500