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	1,749			1,669
Computer and office equipment	9,991			9,451
Furniture and fixtures	175			162
Equipment under lease	6,652			6,529
Transportation equipment	67			67
Total	18,984			18,200
Less accumulated depreciation	(17,058		)	(14,203		)
Construction in progress	3,594			3,390
Property and equipment, net	$	5,520		$	7,387