Property and equipment (Tables)

12 Months Ended

Dec. 31, 2014

Property and equipment at December 31, 2014 and 2013 consisted of the following:



	Estimated Useful Life (in Years)	2014			2013
Machinery and equipment	5 - 7 years	$	936,705		$	773,894
Furniture and fixtures	5 years	99,346			79,612
Computer software	3 - 5 years	67,215			67,215
Leasehold improvements	*	427,791			397,158
		1,531,057			1,317,879
Less - accumulated depreciation and amortization		(872,636		)	(679,853		)
Net property, plant and equipment		$	658,421		$	638,026

* Lesser of estimated useful life of asset or lease term