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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES - Concentration of credit risk (Details) - Prepayments to suppliers - Supplier - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Supplier A
Concentration of credit risk
Advances to suppliers	$ 18,260	$ 18,260
Supplier B
Concentration of credit risk
Advances to suppliers		$ 9,086

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- Definition

Represents the carrying value of capitalized payments made in advance for inventory to suppliers.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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