Note 7 - Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Property, Plant and Equipment [Table Text Block]

	December 31,			December 31,
	2019			2018
Lab and build-to-suit equipment	$	7,562,263		$	7,266,895
Office equipment		128,669			130,460
Furniture and fixtures		237,951			205,051
Computer equipment		804,046			799,515
Leasehold improvements		11,762,351			8,878,361
Construction-in-progress		91,797			155,148
Total property, plant and equipment		20,587,077			17,435,430
Accumulated depreciation and amortization		(11,333,112	)		(9,304,722	)
Property, plant and equipment, net	$	9,253,965		$	8,130,708

Schedule of Construction In Progress Roll forward [Table Text Block]

	Leasehold			Build-to-suit			Lab
	Improvements			Equipment			Equipment			Total
Balance as of December 31, 2017	$	1,208,107		$	1,583,054		$	39,246		$	2,830,407
Add: Purchases related to CIP		425,438			82,687			114,102			622,227
Less: Transfer due to being placed in service		(1,570,194	)		(1,665,741	)		(61,551	)		(3,297,486	)
Balance as of December 31, 2018		63,351			—			91,797			155,148
Add: Purchases related to CIP		2,820,640			—			—			2,820,640
Less: Transfer due to being placed in service		(2,883,991	)		—			—			(2,883,991	)
Balance as of December 31, 2019	$	-		$	-		$	91,797		$	91,797