Note 5 - Property and Equipment

3 Months Ended

Mar. 31, 2013

Property, Plant and Equipment Disclosure [Text Block]

Note 5 — Property and Equipment

A summary of the components of property and equipment at March 31, 2013 and December 31, 2012 are as follows:

	Estimated Useful Lives			March 31, 2013			December 31, 2012
Research and development equipment	3	to	5 years	$	3,984,606		$	3,542,045
Leasehold improvements			5 years		362,455			333,646
Computer equipment			5 years		97,740			97,740
Office equipment	3	to	5 years		95,144			95,144
Work-in-progress					1,892,690			—
					6,432,635			4,068,575
Accumulated depreciation					(2,750,788	)		(2,531,917	)
Property and equipment, net				$	3,681,847		$	1,536,658

Depreciation and amortization expense of property and equipment for the three months ended March 31, 2013 and March 31, 2012 was approximately $218,871 and $126,866, respectively.