Deferred Revenue (Tables)

12 Months Ended

Dec. 31, 2015

Deferred Revenue [Abstract]

Schedule of Deferred Revenue

	December 31,
	2014		2015
Deferred revenue – current
Customers advance	$	52,548	$	60,440
Deferred income		20,342		19,499
Total deferred revenue - current	$	72,890	$	79,939
Deferred revenue - noncurrent
Customers advance	$	1,606	$	1,024
Deferred income		675		1,821
Total deferred revenue - noncurrent	$	2,281	$	2,845