SHORT-TERM INVESTMENTS, NET - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2020 CNY (¥)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 CNY (¥)	Jul. 15, 2019 USD ($)
Short-term investment , net \| ¥	¥ 0		¥ 69,618
Impairment of short-term investment	¥ 67,169	$ 10,294
Cornerstone Management, Inc
Short-term investment , net \| $				$ 10,000
Interest rate on investments				8.00%

Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(4))
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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-Publisher FASB
-Name Accounting Standards Codification
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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	instant