Inventory

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Inventory

Inventories

Inventories consist of the following:

	As of December 31,
	2017		2016
Raw materials	$	190,045	$	92,287
Work-in-process	302,042		202,301
Finished goods	21,791		13,334
Deferred costs	212,260		91,434
	$	726,138	$	399,356

Deferred costs represent the costs of product manufactured and shipped to the Company's collaborators for which recognition of revenue has been deferred (see Note 1).