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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED BALANCE SHEETS
Accounts receivable trade, allowance	$ 40,293	$ 29,545
Advances to suppliers - current, allowance	5,845	7,222
Advances to suppliers - non-current, allowance	$ 13,855	$ 13,059
Common share, par value (in dollars per share)	$ 0	$ 0
Common shares, shares issued (in shares)	59,820,384	59,371,684
Common shares, shares outstanding (in shares)	59,820,384	59,371,684
Treasury stock, shares issued (in shares)	0	609,516

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- Definition

A valuation allowance for advances made to suppliers expected to be utilized within twelve months (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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A valuation allowance for advances made to suppliers expected to be utilized after twelve months (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

+ References

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Amount of allowance for credit loss on accounts receivable, classified as current.

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Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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