Note 5 - Property and Equipment (Tables)

6 Months Ended

Jun. 30, 2013

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

A summary of the components of property and equipment at June 30, 2013 and December 31, 2012 are as follows:

	Estimated Useful Lives			June 30,  2013			December 31, 2012
Research and development equipment			3 years	$	6,680,214		$	3,542,045
Leasehold improvements			5 years		385,323			333,646
Computer equipment			5 years		97,740			97,740
Office equipment	3 years	to	5 years		95,144			95,144
Work-in-progress					5,667,793			—
					12,926,214			4,068,575
Accumulated depreciation					(3,071,386	)		(2,531,917	)
Property and equipment, net				$	9,854,828		$	1,536,658