Revenue and Accounts Receivable, Net (Tables)

6 Months Ended

Jun. 30, 2021

Receivables [Abstract]

Pattern of Revenue Recognition

The pattern of revenue recognition was as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
(In thousands)	2021		2020		2021		2020
Goods and services transferred at a point in time	$	119,503	$	121,187	$	242,391	$	238,245
Goods and services transferred over time	30,988		31,946		58,642		66,666
Net sales	$	150,491	$	153,133	$	301,033	$	304,911

Revenue from External Customers by Geographic Areas

Our net sales to external customers by geographic area were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
(In thousands)	2021		2020		2021		2020
United States	$	51,322	$	65,233	$	101,614	$	139,614
Asia (excluding PRC)	31,608		30,295		65,824		58,120
Europe	31,640		26,004		59,167		46,506
People's Republic of China	23,489		20,511		47,829		38,028
Latin America	5,368		3,466		11,512		8,106
Other	7,064		7,624		15,087		14,537
Total net sales	$	150,491	$	153,133	$	301,033	$	304,911

Net Sales to Significant Customers

Net sales to the following customers totaled more than 10% of our net sales:

	Three Months Ended June 30,
	2021				2020
	$ (thousands)		% of Net Sales		$ (thousands)		% of Net Sales
Comcast Corporation	$	24,699	16.4	%	$	29,546	19.3	%
Daikin Industries Ltd.	$	16,448	10.9	%	$	16,457	10.7	%

	Six Months Ended June 30,
	2021				2020
	$ (thousands)		% of Net Sales		$ (thousands)			% of Net Sales
Comcast Corporation	$	51,900	17.2	%	$	62,481		20.5	%
Daikin Industries Ltd.	$	33,885	11.3	%	$	—	(1)	—	%	(1)

(1)Sales associated with this customer did not total more than 10% of our net sales for the indicated period.

Accounts Receivable, Net and Changes in the Allowance for Doubtful Accounts

Accounts receivable, net were as follows:

(In thousands)	June 30, 2021		December 31, 2020
Trade receivables, gross	$	126,997	$	122,828
Allowance for credit losses	(1,372)		(1,412)
Allowance for sales returns	(465)		(761)
Trade receivables, net	125,160		120,655
Other	9,834		8,778
Accounts receivable, net	$	134,994	$	129,433

Changes in the allowance for credit losses were as follows:

(In thousands)	Six Months Ended June 30,
	2021		2020
Balance at beginning of period	$	1,412	$	1,492
Additions to costs and expenses	1		240
Write-offs/Foreign exchange effects	(41)		(35)
Balance at end of period	$	1,372	$	1,697

Trade Receivables Associated with Significant Customers

Trade receivables associated with this significant customer that totaled more than 10% of our accounts receivable, net were as follows:

	June 30, 2021				December 31, 2020
	$ (thousands)		% of Accounts Receivable, Net		$ (thousands)		% of Accounts Receivable, Net
Comcast Corporation	$	22,908	17.0	%	$	19,782	15.3	%