Note 5 - Property, Plant and Equipment - Major Classes of Property, Plant and Equipment (Details) - USD ($)		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Property, plant and equipment, gross		$ 35,522,568	$ 20,206,400
Less: Accumulated depreciation and amortization		(6,683,111)	(5,861,476)
Property, plant and equipment, net		28,839,457	14,344,924
Depreciation and amortization	[1]	867,277	813,657
Land [Member]
Property, plant and equipment, gross		6,929,000	2,220,000
Building [Member]
Property, plant and equipment, gross		15,917,925	6,631,039
Building Improvements [Member]
Property, plant and equipment, gross		5,805,045	5,615,823
Machinery and Equipment [Member]
Property, plant and equipment, gross		3,246,877	2,671,333
Furniture and Fixtures [Member]
Property, plant and equipment, gross		563,959	547,144
Computer Equipment [Member]
Property, plant and equipment, gross		587,147	479,534
Software Development [Member]
Property, plant and equipment, gross		427,441
Transportation Equipment [Member]
Property, plant and equipment, gross		65,994	65,994
Lab Equipment [Member]
Property, plant and equipment, gross		$ 1,979,181	$ 1,975,533

[1] Includes amortization expense of $45,645 and $31,356 for the years ending December 31, 2017 and 2016, respectively. Such amortization expense relates to other capitalized and intangible assets.