Information Concerning Product Lines, Geographic Information, Accounts Receivable and Revenue Concentration (Schedule of Revenue by Geographical Area) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2014		Dec. 29, 2013		Dec. 30, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 27,845	[1]	$ 26,072	[1]	$ 14,944	[1]
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	20,157	[2]	20,099		5,376
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	3,371		1,788		2,414
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	4,317	[3]	4,185		7,154
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	14,409
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 4,052
Sales Revenue, Goods, Net [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of revenue from major customer	14.00%
Sales Revenue, Goods, Net [Member] | South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of revenue from major customer	52.00%

[1] For all periods presented: New products include all products manufactured on 180 nanometer or small semiconductor processes. Mature products include all products produced on semiconductor processes larger than 180 nanometers

[2] Asia Pacific includes revenue from South Korea of $14,409 or 52% of total revenue in 2014.

[3] North America includes revenue from the United States of $4,052 or 14% of total revenue in 2014.