Revenues (Tables)

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Schedule of Accounts Receivable

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

	As of
(in thousands)	June 30, 2020			December 31, 2019
Trade receivables	$	5,922		$	8,057
Less: Allowance for doubtful accounts	(603		)	(627		)
Trade receivables, net	$	5,319		$	7,430

Schedule of Disaggregation of Revenue

The following tables disaggregate revenues by major component for the three and six months ended June 30, 2020 and 2019 (in thousands):

	Three Months Ended June 30, 2020								Six Months Ended June 30, 2020
	Segment								Segment
	PGI		RC		Other		Total		PGI		RC		Other		Total
Revenue component
Consumables	$	7,070	$	—	$	1,100	$	8,170	$	15,545	$	—	$	1,842	$	17,387
License royalties, related party	—		3,313		—		3,313		—		6,359		—		6,359
Revenues from customers	7,070		3,313		1,100		11,483		15,545		6,359		1,842		23,746
Earnings from equity method investments	—		8,168		—		8,168		—		16,441		—		16,441
Total revenues from customers and earnings from equity method investments	$	7,070	$	11,481	$	1,100	$	19,651	$	15,545	$	22,800	$	1,842	$	40,187

	Three Months Ended June 30, 2019								Six Months Ended June 30, 2019
	Segment								Segment
	PGI		RC		Other		Total		PGI		RC		Other		Total
Revenue component
Consumables	$	11,049	$	—	$	337	$	11,386	$	25,602	$	—	$	893	$	26,495
License royalties, related party	—		4,191		—		4,191		—		8,411		—		8,411
Revenues from customers	11,049		4,191		337		15,577		25,602		8,411		893		34,906
Earnings from equity method investments	—		20,935		—		20,935		—		42,625		—		42,625
Total revenues from customers and earnings from equity method investments	$	11,049	$	25,126	$	337	$	36,512	$	25,602	$	51,036	$	893	$	77,531