Revenues (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Accounts Receivable

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

	As of
(in thousands)	June 30, 2021		December 31, 2020
Trade receivables	$	9,983	$	12,241
Less: Allowance for doubtful accounts	(39)		(37)
Trade receivables, net	$	9,944	$	12,204

The following table shows the components of the Cabot Receivable:

	As of
(in thousands)	June 30, 2021		December 31, 2020
Receivables, net	$	1,616	$	921
Other long-term assets, net	7,952		8,852
Total Cabot Receivable	$	9,568	$	9,773

Schedule of Disaggregation of Revenue

The following tables disaggregate revenues by major component for the three and six months ended June 30, 2021 and 2020 (in thousands):

	Three Months Ended June 30, 2021						Six Months Ended June 30, 2021
	Segment						Segment
	APT		RC		Total		APT		RC		Total
Revenue component
Consumables	$	15,976	$	—	$	15,976	$	33,007	$	—	$	33,007
License royalties, related party	—		3,657		3,657		—		7,723		7,723
Revenues from customers	15,976		3,657		19,633		33,007		7,723		40,730
Earnings from equity method investments	—		21,437		21,437		—		39,749		39,749
Total revenues from customers and earnings from equity method investments	$	15,976	$	25,094	$	41,070	$	33,007	$	47,472	$	80,479

	Three Months Ended June 30, 2020						Six Months Ended June 30, 2020
	Segment						Segment
	APT		RC		Total		APT		RC		Total
Revenue component
Consumables	$	8,170	$	—	$	8,170	$	17,387	$	—	$	17,387
License royalties, related party	—		3,313		3,313		—		6,359		6,359
Revenues from customers	8,170		3,313		11,483		17,387		6,359		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	$	8,170	$	11,481	$	19,651	$	17,387	$	22,800	$	40,187