FAIR VALUE MEASUREMENT	12 Months Ended
FAIR VALUE MEASUREMENT	Dec. 31, 2018
FAIR VALUE MEASUREMENT
FAIR VALUE MEASUREMENT	14. FAIR VALUE MEASUREMENT Measured or disclosed at fair value on a recurring basis The Group measured its financial assets and liabilities, including cash equivalents, available-for-sale security, restricted cash, accounts receivable, loan receivables, amounts due from related parties, other receivables and other payables on a recurring basis as of December 31, 2017 and 2018. Cash and cash equivalents and restricted cash are classified within Level 1 of the fair value hierarchy because they are valued based on the quoted market price in an active market. The carrying amounts of accounts receivables, loan receivables-current and amounts due from related parties approximate their fair values. The carrying amount of loan receivables -noncurrent approximates fair value as its interest rates are at the same level of current market yield for comparable loans. The Company measured available-for-sale security based on a valuation which utilizes income approach to determine the equity value and the options-pricing method to determine the allocated values between preferred shares and common shares. The available-for-sale security is classified within Level 3 of the fair value hierarchy because the Company used unobservable inputs to value the investment. The significant unobservable inputs include the forecast financial performance of the investee business and discount rate to determine the fair value of the business. Measured or disclosed at fair value on a non-recurring basis The Group's goodwill and intangible assets are primarily acquired through business acquisitions. Purchase price allocation are measured at fair value on a nonrecurring basis as of the acquisition dates. The Group measures its goodwill and intangible assets at fair value on a nonrecurring basis annually or whenever events or changes in circumstances indicate that carrying amount of a reporting unit exceeds its fair value. Acquired intangible assets are measured using the income approach - discounted cash flow method when events or changes in circumstances indicate that the carrying amount of an asset may no longer be recoverable. The Group did not recognize any impairment loss related to intangible assets acquired for the years ended December 31, 2016, 2017 and 2018. The Group measures long-term equity method investment at fair value on a non-recurring basis whenever events or changes in circumstances indicate that the carrying value may no longer be recoverable. The fair value is determined using models with significant unobservable inputs (Level 3 inputs), primarily the management projection of discounted future cash flow and the discount rate. The Group did not recognize any impairment loss related to the long-term equity method investment for the years ended December 31, 2016, 2017 and 2018.

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.