Property and Equipment (Tables)

9 Months Ended

Sep. 30, 2021

Property Plant And Equipment [Abstract]

Property and Equipment, Net

Property and equipment consists of the following (in thousands):

	Estimated Useful
	Life (Years)		September 30, 2021				December 31, 2020
Land		—	$	875			$	875
Buildings	39-40			17,389				17,389
Building improvements	5-40			38,651				37,543
Machinery and equipment	3-15			54,978				55,054
Furniture, fixtures and office equipment	5-10			3,004				3,004
Computer equipment and software		3		8,361				8,319
Construction in progress		—		5,262		(1)		503
				128,520				122,687
Less accumulated depreciation				(97,672	)			(96,820	)
Total property and equipment, net			$	30,848			$	25,867

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(1) Construction in progress includes $1.6 million of equipment under construction for the manufacturing expansion for UT (the “UT Equipment”). See Note 7 – Collaboration, Licensing and Other Arrangements.

Depreciation Expense Related to Property and Equipment

Depreciation expense related to property and equipment for the three and nine months ended September 30, 2021 and 2020 was as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Depreciation Expense	$	508	$	445	$	1,449	$	1,346