Revenue (Tables)

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue from Contracts with Customers

The following tables represent a disaggregation of revenue from contracts with customers for fiscal 2022 and 2021.

Major Products and Service Lines

	2022										2021
	(in thousands)
	HDD		DCP		PV		ASP		Total		HDD		DCP		PV		ASP		Total
Systems, upgrades and spare parts	$	29,507	$	1	$	273	$	100	$	29,881	$	28,300	$	3	$	258	$	3,850	$	32,411
Field service		5,647		43		190		—		5,880		6,031		14		68		—		6,113
Total net revenues	$	35,154	$	44	$	463	$	100	$	35,761	$	34,331	$	17	$	326	$	3,850	$	38,524

Primary Geography Markets

	2022		2021
	(in thousands)
United States	$	4,558	$	3,670
Asia		31,103		31,004
Europe		100		3,850
Total net revenues	$	35,761	$	38,524

Timing of Revenue Recognition

	2022		2021
	(in thousands)
Products transferred at a point in time	$	35,761	$	38,524
Products and services transferred over time		—		—
Total net revenues	$	35,761	$	38,524

Changes in Contract Assets and Contract Liabilities

The following table reflects the changes in our contract assets, which we classify as accounts receivable, unbilled or retainage and our contract liabilities which we classify as deferred revenue and customer advances for fiscal 2022:

	December 31, 2022		January 1, 2022		Change
	(In thousands)
Contract assets:
Accounts receivable, unbilled	$	424	$	99	$	325
Contract liabilities:
Deferred revenue	$	2,446	$	65	$	2,381
Customer advances		24,659		2,107		22,552
	$	27,105	$	2,172	$	24,933