Revenue and Accounts Receivable, Net (Tables)

3 Months Ended

Mar. 31, 2021

Receivables [Abstract]

Pattern of Revenue Recognition

The pattern of revenue recognition was as follows:

	Three Months Ended March 31,
(In thousands)	2021		2020
Goods and services transferred at a point in time	$	122,888	$	117,058
Goods and services transferred over time	27,654		34,720
Net sales	$	150,542	$	151,778

Revenue from External Customers by Geographic Areas

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

	Three Months Ended March 31,
(In thousands)	2021		2020
United States	$	50,292	$	74,381
Asia (excluding PRC)	34,216		27,825
Europe	27,527		20,502
People's Republic of China	24,340		17,517
Latin America	6,144		4,640
Other	8,023		6,913
Total net sales	$	150,542	$	151,778

Net Sales to Significant Customers

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

	Three Months Ended March 31,
	2021				2020
	$ (thousands)		% of Net Sales		$ (thousands)			% of Net Sales
Comcast Corporation	$	27,201	18.1	%	$	32,935		21.7	%
Daikin Industries Ltd.	$	17,437	11.6	%	—		(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)	March 31, 2021		December 31, 2020
Trade receivables, gross	$	134,003	$	122,828
Allowance for credit losses	(1,358)		(1,412)
Allowance for sales returns	(408)		(761)
Trade receivables, net	132,237		120,655
Other	7,471		8,778
Accounts receivable, net	$	139,708	$	129,433

Changes in the allowance for credit losses were as follows:

(In thousands)	Three Months Ended March 31,
	2021		2020
Balance at beginning of period	$	1,412	$	1,492
Additions to costs and expenses	2		237
Write-offs/Foreign exchange effects	(56)		(48)
Balance at end of period	$	1,358	$	1,681

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:

	March 31, 2021				December 31, 2020
	$ (thousands)		% of Accounts Receivable, Net		$ (thousands)		% of Accounts Receivable, Net
Comcast Corporation	$	25,022	17.9	%	$	19,782	15.3	%