Summary of Significant Accounting Policies and Other Information (Tables)

12 Months Ended

Dec. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedules of Concentration of Risk, by Risk Factor

The following table presents customers individually accounting for more than 10% of the Company’s net sales:

	For the Year Ended December 31,
	2021		2020
Customer A	17	%	14	%
Customer B	21	%	11	%

The following table presents customers individually accounting for more than 10% of the Company’s trade accounts receivable:

	As of December 31,
	2021		2020
Customer A	24	%	16	%
Customer C	**		22	%

**    Less than 10% of the total

The following table presents suppliers individually accounting for more than 10% of the Company’s purchases:

	For the Year Ended December 31,
	2021		2020
Supplier A	**		22	%
Supplier B	12	%	**

Schedule of Inventory, Current

Inventories consist of the following:

(in thousands)	As of December 31,
Inventories	2021		2020
Raw materials	$	120,130	$	89,684
Work in process	8,923		2,482
Finished goods	16,509		19,375
Total inventories	145,562		111,541
Inventory allowance	(3,370)		(3,328)
Inventories, net	$	142,192	$	108,213

Activity in the Company’s inventory allowance was as follows:

(in thousands)	For the Year Ended December 31,
Inventory Allowance	2021		2020
Balance at beginning of period	$	3,328	$	2,964
Charged to expense	1,035		1,436
Write-offs	(993)		(1,072)
Balance at end of period	$	3,370	$	3,328

Summary of Property, Plant and Equipment

Estimated useful lives by each type of asset category are as follows:

	Years
Buildings	Up to 39
Leasehold improvements	Lesser of (i) expected useful life of improvement or (ii) life of lease (including likely extension thereof)
Machinery and equipment	1 to 10

Property, plant and equipment by type were as follows:

(in thousands)	As of December 31,
Property, Plant and Equipment	2021		2020
Leasehold improvements	$	7,107	$	6,725
Machinery and equipment	44,358		43,030
Construction in progress	1,125		1,670
Total property, plant and equipment, at cost	52,590		51,425
Accumulated depreciation	(35,246)		(31,244)
Property, plant and equipment, net	$	17,344	$	20,181

Schedule of Other Accrued Liabilities

Other accrued liabilities consisted of the following:

(in thousands)	As of December 31,
Other Accrued Liabilities	2021		2020
Accrued product warranty	$	15,830	$	14,928
Litigation reserves *	894		3,128
Contract liabilities	1,819		47,960
Accrued compensation and benefits	4,397		3,124
Operating lease liabilities	3,978		3,793
Accrued interest expense	625		895
Other	7,258		3,791
Total	$	34,801	$	77,619

*As of December 31, 2020 and 2021, litigation reserves related to various ongoing legal matters including associated legal fees.

Schedule of Product Warranty Liability

Accrued product warranty activities are presented below:

(in thousands)	For the Year Ended December 31,
Accrued Product Warranty	2021		2020
Balance at beginning of year	$	31,542	$	25,501
Current year provision *	18,242		18,272
Changes in estimates for preexisting warranties **	9,397		8,738
Payments made during the period	(26,233)		(20,969)
Balance at end of year	32,948		31,542
Less: Current portion	15,830		14,928
Noncurrent accrued product warranty	$	17,118	$	16,614

*Warranty costs, net of supplier recoveries, were $22.8 million and $19.5 million for the year ended December 31, 2021 and 2020, respectively. Supplier recoveries were $4.8 million and $7.5 million for the year ended December 31, 2021 and 2020, respectively.

**Change in estimates for preexisting warranties reflect changes in the Company’s estimate of warranty costs for products sold in prior periods. Such adjustments typically occur when claims experience deviates from historic and expected trends. The Company’s warranty liability is generally affected by failure rates, repair costs and the timing of failures. Future events and circumstances related to these factors could materially change the estimates and require adjustments to the warranty liability. In addition, new product launches require a greater use of judgment in developing estimates until historical experience becomes available. The Company recorded charges for changes in estimates for preexisting warranties of $9.4 million, or $0.41 per diluted share, and $8.7 million, or $0.38 per diluted share, for the years ended December 31, 2021 and 2020, respectively.