NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES - Noncontrolling Interest (Details) - USD ($)				12 Months Ended
	Dec. 17, 2027	Dec. 17, 2025	Jun. 27, 2025	Dec. 31, 2025	Dec. 31, 2024	Jun. 30, 2025	Dec. 31, 2023
Noncontrolling Interest [Line Items]
Acquisition of noncontrolling interest				$ 6,162,000	$ 0
Purchases of noncontrolling interests included in other liabilities		$ 1,000,000.0		1,000,000	0
Noncontrolling interest outstanding				161,553,000	160,991,000		$ 159,540,000
Noncontrolling Interests
Noncontrolling Interest [Line Items]
Noncontrolling interest outstanding				$ 0	$ 5,678,000		$ 5,482,000
Nature’s Sunshine Hong Kong Limited
Noncontrolling Interest [Line Items]
Joint venture ownership		100.00%
Shanghai Nature’s Sunshine Health Products Co., Ltd
Noncontrolling Interest [Line Items]
Joint venture ownership		100.00%
Nature’s Sunshine Hong Kong Limited
Noncontrolling Interest [Line Items]
Share purchase agreement, expected payment to acquire interest in joint venture						$ 3,100,000
Acquisition of noncontrolling interest		$ 3,100,000
Shanghai Nature’s Sunshine Health Products Co., Ltd
Noncontrolling Interest [Line Items]
Share purchase agreement, expected payment to acquire interest in joint venture						$ 3,900,000
Acquisition of noncontrolling interest		$ 2,900,000
Shanghai Nature’s Sunshine Health Products Co., Ltd | Forecast
Noncontrolling Interest [Line Items]
Acquisition of noncontrolling interest	$ 1,000,000.0
Shanghai Fosun Pharmaceutical (Group) Co., Ltd.
Noncontrolling Interest [Line Items]
Number of shares sold in transaction (in shares)			2,854,607