Accounts Receivable - net (Tables)

12 Months Ended

Dec. 31, 2013

Accounts Receivable - net

Schedule of accounts receivable - net

	December 31,			December 31,
	2012			2013
Trade receivables (note 9)	$	25,606		$	33,743
Allowance for doubtful accounts	(2,936		)	(2,429		)
	22,670			31,314
Other receivables	770			613
Total accounts receivable	$	23,440		$	31,927

Schedule of maximum exposure to credit risk at the balance sheet date relating to trade receivables

	December 31,		December 31,
	2012		2013
Aging within one year, net of allowance for doubtful accounts	$	22,065	$	29,565
Aging greater than one year, net of allowance for doubtful accounts	605		1,749
Total trade receivables	$	22,670	$	31,314