4. INVENTORIES

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

INVENTORIES

Inventories consist of the following at December 31:

	2018		2017
Materials	$	2,043,843	$	1,524,728
Work in process		121,624		1,149
Finished goods		5,762,211		3,676,426
Total	$	7,927,678	$	5,202,303

Finished goods includes consigned inventory held by our customers of $1,537,300 and $958,500 at December 31, 2018 and 2017, respectively. The Company reviews inventory for obsolete and slow moving products each quarter and makes provisions based on its estimate of the probability that the material will not be consumed or that it will be sold below cost. The provision for inventory reserves was negligible for the year ended December 31, 2018 and $200,357 for the year ended December 31, 2017.