Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

	December 31,
(in thousands)	2019			2018
Leasehold improvements	$	350		$	322
Manufacturing equipment	1,550			1,435
Computer and office equipment	9,101			9,119
Furniture and fixtures	136			123
Equipment under lease	6,652			6,529
Transportation equipment	67			67
Total	17,856			17,595
Less accumulated depreciation	(16,040		)	(13,952		)
Construction in progress	744			62
Property and equipment, net (1)	$	2,560		$	3,705