Fixed Assets

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Fixed Assets

5. Fixed Assets

Fixed assets consist of the following:

	Estimated Useful Life (Years)			December 31,
				2015			2014
Construction in process				$	—		$	182,755
Computer and laboratory equipment		3			1,698,390			1,782,330
Furniture and equipment		3			319,046			109,617
Production equipment		7			864,287			745,596
Leasehold improvements			*		117,994			7,268
					2,999,717			2,827,566
Less – accumulated depreciation					(2,316,183	)		(2,516,046	)
				$	683,534		$	311,520

* Lesser of life of lease or estimated useful life.

Depreciation expense was $222,592, $145,100, and $150,663 for 2015, 2014, and 2013, respectively.