Note 5 - Property, Plant and Equipment (Detail) - Major classes of property, plant and equipment (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Property and equipment, gross	$ 21,340,327		$ 12,173,241
Less: Accumulated depreciation and amortization	(4,394,600)		(4,224,284)
	16,945,727		7,948,957
Depreciation and amortization expense (2)	515,215	[1]	597,040	[1]
Land [Member]
Property and equipment, gross	2,110,000		1,135,000
Building [Member]
Property and equipment, gross	8,903,514		4,507,366
Building Improvements [Member]
Property and equipment, gross	1,746,712		2,141,261
Machinery and Equipment [Member]
Property and equipment, gross	2,034,012		2,000,607
Furniture and Fixtures [Member]
Property and equipment, gross	356,460		343,445
Computer Equipment [Member]
Property and equipment, gross	536,206		503,620
Transportation Equipment [Member]
Property and equipment, gross	41,599		109,969
Lab Equipment [Member]
Property and equipment, gross	1,560,251	[2]	1,431,973	[2]
Construction in Progress [Member]
Property and equipment, gross	$ 4,051,573

[1] Includes amortization expense of $14,096 and $136,704 for the years ending December 31, 2012 and 2011, respectively. Such amortization expense relates to other capitalized and intangible assets.

[2] Includes equipment that was transferred from inventory. See supplemental cash flow information.