Revenues (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Schedule of Receivables

The following table shows the components of Trade receivables, net:

	As of December 31,
(in thousands)	2019			2018
Trade receivables	$	8,057		$	10,121
Less: Allowance for doubtful accounts	(627		)	(567		)
Trade receivables, net	$	7,430		$	9,554

Schedule of Disaggregation of Revenue

The following tables disaggregate revenues by major source for the year ended December 31, 2019 and 2018 (in thousands):

	Year ended December 31, 2019
	Segment
(in thousands)	PGI		RC		Other		Total
Revenue component
Consumables	$	50,458	$	—	$	2,729	$	53,187
License royalties, related party	—		16,899		—		16,899
Revenues from customers	50,458		16,899		2,729		70,086
Earnings from equity method investments	—		69,176		—		69,176
Total revenues and earnings from equity method investments	$	50,458	$	86,075	$	2,729	$	139,262

	Year ended December 31, 2018
	Segment
(in thousands)	PGI		RC		Other		Total
Revenue component
Consumables	$	8,628	$	—	$	105	$	8,733
License royalties, related party	—		15,140		—		15,140
Other	72		—		—		72
Revenues from customers	8,700		15,140		105		23,945
Earnings from equity method investments	—		54,208		—		54,208
Total revenues and earnings from equity method investments	$	8,700	$	69,348	$	105	$	78,153