DISCONTINUED OPERATIONS - Assets and Liabilities Related to discontinued operations of the MST Franchise (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Total current assets of discontinued operations	$ 0	$ 7,845
Discontinued Operations, Disposed of by Sale | MST Franchise
Current assets:
Inventory	0	7,291
Prepaid expenses and other assets	0	554
Total current assets of discontinued operations	$ 0	$ 7,845