Property and Equipment

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment Disclosure [Text Block]

7. Property and Equipment

Property and equipment consisted of the following:


	Estimated Useful Lives		December 31,
	Estimated Useful Lives		2013			2014
Laboratory equipment		7	$	4,796,393		$	5,828,045
Office equipment and software		3 – 7		972,789			1,225,298
Leasehold improvements		7		348,901			400,018
Assets not in service				503,208			23,836
				6,621,291			7,477,197
Less accumulated depreciation				(2,781,865	)		(3,506,532	)
			$	3,839,426		$	3,970,665

Assets not in service represent new laboratory and computer equipment that was not installed and ready to use at December 31, 2013 and 2014. The total amount of depreciation expense for the years ended December 31, 2012, 2013 and 2014 were $358,367, $674,725 and $857,055, respectively.

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

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