FAIR VALUE MEASUREMENTS AND INVESTMENTS - Recurring (Details) - Recurring basis - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair value measurements
Total assets and liabilities measured at fair value	$ (36,102)	$ (36,055)
Short Term Investments
Fair value measurements
Investments	300	300
Other investments
Fair value measurements
Investments	1,278	1,616
Redeemable common units
Fair value measurements
Financial instruments	(22,266)	(22,557)
Redeemable common units | Alloy Inc
Fair value measurements
Financial instruments	(14,760)	(14,760)
Warrant
Fair value measurements
Financial instruments	(654)	(654)
Level 1
Fair value measurements
Total assets and liabilities measured at fair value	300	300
Level 1 | Short Term Investments
Fair value measurements
Investments	300	300
Level 3
Fair value measurements
Total assets and liabilities measured at fair value	(36,402)	(36,355)
Level 3 | Other investments
Fair value measurements
Investments	1,278	1,616
Level 3 | Redeemable common units
Fair value measurements
Financial instruments	(22,266)	(22,557)
Level 3 | Redeemable common units | Alloy Inc
Fair value measurements
Financial instruments	(14,760)	(14,760)
Level 3 | Warrant
Fair value measurements
Financial instruments	$ (654)	$ (654)