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LONG-TERM INVESTMENTS - Additional information (Details) $ in Thousands, ¥ in Millions	1 Months Ended							3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2025 CNY (¥)	Jun. 30, 2016 USD ($)	Jun. 30, 2016 CNY (¥)	Oct. 31, 2014 USD ($)	May 31, 2014 USD ($)	May 31, 2014 CNY (¥)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024
Equity method investments:
Share of income								$ 255	$ 165	$ 500	$ (133)
Revenues								20,425	16,686	57,701	45,998
Operating income								(1,452)	(571)	(1,980)	(2,791)
Net income								$ (1,291)	1,164	$ (1,602)	(2,411)
Fundrise, L.P.
Equity method investments:
Total consideration					$ 10,000
Ownership percentage	98.04%	98.04%						98.04%		98.04%		98.04%
Share of income								$ 165	165	$ 410	455
Beijing Fenghou Tianyuan Investment and Management Center L.P. (Tianyuan L.P.)
Equity method investments:
Total consideration						$ 1,385	¥ 10.0
Ownership percentage	12.38%	12.38%						12.38%		12.38%		12.38%
Share of income								$ 0	0	$ 0	0
Recognized an impairment loss								0	0	0	588
Cash dividends	$ 90	¥ 0.6
Suzhou Youge Interconnection Venture Capital Center
Equity method investments:
Total consideration			$ 697	¥ 5.0
Ownership percentage			2.98%	2.98%
Fundrise, L.P.
Equity method investments:
Revenues								178		502
Operating income								168		471
Net income								$ 168	$ 168	$ 418	$ 464