Inventory (Notes)

3 Months Ended

Mar. 31, 2020

Inventory [Abstract]

Inventory Disclosure [Text Block]

5. Inventories

Inventories consisted of the following:

(in thousands)	March 31, 2020		December 31, 2019
Raw materials	$	4,204	$	3,739
Work in process	1,894		1,170
Finished goods	4,444		3,152
Total inventory (1)	$	10,542	$	8,061

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⁽¹⁾ The amounts above exclude $30.1 million and $31.7 million of inventory at Noden classified as held for sale as of March 31, 2020 and December 31, 2019, respectively. See Note 2, Discontinued Operations Classified as Assets Held for Sale, for additional information.