PROPERTY AND EQUIPMENT, NET (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

	December 31,
	2017		2018
Cost:
Computers and peripheral equipment	$	29,806	$	31,003
Office furniture and equipment		12,099		12,259
Leasehold improvements		3,553		3,622
		45,458		46,884
Accumulated depreciation:
Computers and peripheral equipment		28,295		29,312
Office furniture and equipment		10,723		10,951
Leasehold improvements		2,605		2,756
		41,623		43,019
Depreciated cost	$	3,835	$	3,865