2. Fair Value Measurements: Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Mar. 28, 2014	Dec. 31, 2013
Marketable Securities	$ 119	$ 229
Debt Securities
Marketable Securities	76	183
Money Market Funds
Marketable Securities	43	46
Fair Value, Inputs, Level 1
Marketable Securities	119	229
Fair Value, Inputs, Level 1 | Debt Securities
Marketable Securities	76	183
Fair Value, Inputs, Level 1 | Money Market Funds
Marketable Securities	43	46
Fair Value, Inputs, Level 2
Marketable Securities	0	0
Fair Value, Inputs, Level 2 | Debt Securities
Marketable Securities	0	0
Fair Value, Inputs, Level 2 | Money Market Funds
Marketable Securities	0	0
Fair Value, Inputs, Level 3
Marketable Securities	0	0
Fair Value, Inputs, Level 3 | Debt Securities
Marketable Securities	0	0
Fair Value, Inputs, Level 3 | Money Market Funds
Marketable Securities	$ 0	$ 0