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Supplemental Financial Information (Disaggregation of Net Sales) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Net sales	$ 6,116	$ 7,203	$ 16,733	$ 24,508
Resales Of Third Party Products
Net sales	5,180	5,089	13,725	18,531
Sale of the Company's modular memory subsystems
Net sales	$ 936	$ 2,114	$ 3,008	$ 5,977

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