Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Equipment

	December 31,
Equipment consists of (in thousands):	2019			2018
Laboratory equipment	$	8,008		$	7,444
Office equipment and leasehold improvements	3,191			3,043
Process development equipment not yet in service	574			822
	11,773			11,309
Accumulated depreciation	(8,891		)	(8,307		)
	$	2,882		$	3,002