INVENTORIES

12 Months Ended

Dec. 31, 2018

INVENTORIES [Abstract]

INVENTORIES

7.  INVENTORIES

The components of inventories are as follows:

	December 31,
	2018		2017
Raw materials	$	63,348	$	46,712
Work in progress		21,441		17,688
Finished goods		35,279		43,319
Inventories	$	120,068	$	107,719