Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2015

Receivables [Abstract]

Schedule of Movement of Allowance for Doubtful Accounts

The movements of allowance for doubtful accounts are as follows:

	2015			2014
Balance as at January 1	$	766		$	5,887
Addition		36,468			—
Written off		(616	)		(2,142	)
Written back		(65	)		(2,979	)
Balance as at December 31	$	36,553		$	766

Ageing of Accounts Receivable

The ageing of accounts receivable as of December 31, 2015 and 2014 consisted of the followings:

	December 31, 2015							December 31, 2014
	Gross		Allowance			Net		Gross		Allowance			Net
Current		26,054		(60	)		25,994		22,670		(16	)		22,654
0-90 days past due		65,737		(22,664	)		43,073
91-180 days past due		3,488		—			3,488		—		—			—
181-365 days past due		582		—			582		—		—			—
over 1 year past due		14,075		(13,829	)		246		750		(750	)		—
Total	$	109,936	$	(36,553	)	$	73,383	$	23,420	$	(766	)	$	22,654