Revenues

6 Months Ended

Jun. 30, 2024

Revenue from Contract with Customer [Abstract]

Revenues

5. Revenues

The following tables present the Company’s net revenues disaggregated by geography based on the location of the customer, by product line (in thousands):

	Three Months Ended June 30, 2024
	Brick Products		Advanced Products		Total
United States	$	25,431	$	23,231	$	48,662
Europe		6,559		3,431		9,990
Asia Pacific		7,220		19,602		26,822
All other		276		104		380
	$	39,486	$	46,368	$	85,854

	Six Months Ended June 30, 2024
	Brick Products		Advanced Products		Total
United States	$	46,405	$	50,417	$	96,822
Europe		13,416		7,430		20,846
Asia Pacific		19,488		31,654		51,142
All other		769		147		916
	$	80,078	$	89,648	$	169,726

	Three Months Ended June 30, 2023
	Brick Products		Advanced Products		Total
United States	$	18,229	$	15,827	$	34,056
Europe		6,955		6,034		12,989
Asia Pacific		13,127		45,619		58,746
All other		923		33		956
	$	39,234	$	67,513	$	106,747

	Six Months Ended June 30, 2023
	Brick Products		Advanced Products		Total
United States	$	39,485	$	29,537	$	69,022
Europe		14,501		10,061		24,562
Asia Pacific		29,974		79,063		109,037
All other		1,799		143		1,942
	$	85,759	$	118,804	$	204,563

The following tables present the Company’s net revenues disaggregated by the category of revenue, by product line (in thousands):

	Three Months Ended June 30, 2024
	Brick Products		Advanced Products		Total
Direct customers, contract manufacturers and    non-stocking distributors	$	20,238	$	27,713	$	47,951
Stocking distributors, net of sales allowances		19,158		8,369		27,527
Non-recurring engineering		90		655		745
Royalties		—		9,271		9,271
Other		—		360		360
	$	39,486	$	46,368	$	85,854

	Six Months Ended June 30, 2024
	Brick Products		Advanced Products		Total
Direct customers, contract manufacturers and    non-stocking distributors	$	41,048	$	49,353	$	90,401
Stocking distributors, net of sales allowances		38,565		18,001		56,566
Non-recurring engineering		465		4,123		4,588
Royalties		—		17,451		17,451
Other		—		720		720
	$	80,078	$	89,648	$	169,726

	Three Months Ended June 30, 2023
	Brick Products		Advanced Products		Total
Direct customers, contract manufacturers and    non-stocking distributors	$	24,435	$	55,556	$	79,991
Stocking distributors, net of sales allowances		14,338		6,345		20,683
Non-recurring engineering		461		2,796		3,257
Royalties		—		2,456		2,456
Other		—		360		360
	$	39,234	$	67,513	$	106,747

	Six Months Ended June 30, 2023
	Brick Products		Advanced Products		Total
Direct customers, contract manufacturers and    non-stocking distributors	$	54,921	$	97,569	$	152,490
Stocking distributors, net of sales allowances		30,075		11,397		41,472
Non-recurring engineering		763		4,924		5,687
Royalties		—		4,476		4,476
Other		—		438		438
	$	85,759	$	118,804	$	204,563

The following table presents the changes in certain contract liabilities (in thousands):

	June 30, 2024			December 31, 2023			Change
Short-term deferred revenue and customer prepayments	$	(2,656	)	$	(3,157	)	$	501
Long-term deferred revenue		(300	)		(1,020	)		720
Sales allowances		(2,989	)		(3,482	)		493

The Company records deferred revenue, which represents a contract liability, when cash payments are received or due in advance of performance under a contract with a customer. The Company recognized revenue of approximately $360,000 and $720,000 for the three and six months ended June 30, 2024, respectively, and $2,236,000 and $3,845,000 for the three and six months ended June 30, 2023 that was included in deferred revenue at the beginning of the respective period.