INVENTORIES

6 Months Ended

Jun. 30, 2019

INVENTORIES [Abstract]

INVENTORIES

5.  INVENTORIES

The components of inventories are as follows:

	June 30,		December 31,
	2019		2018
Raw materials	$	53,251	$	63,348
Work in progress		28,548		21,441
Finished goods		36,410		35,279
Inventories	$	118,209	$	120,068