Note 12 - Benefit Plans (Details) - Company's U.S and German Pension Plan Assets Measured at Fair Value (USD $) In Thousands, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Equities:
Cash and equivalents	$ 9,247
Total pension plan assets	141,584	126,225	88,901
Equity Securities [Member] | Global Equity Index Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Equities:
Investments	13,168	12,859
Equity Securities [Member] | Global Equity Index Fund [Member]
Equities:
Investments	13,168	12,859
Equity Securities [Member] | Philippine Stock [Member] | Fair Value, Inputs, Level 1 [Member]
Equities:
Investments	1,069	918
Equity Securities [Member] | Philippine Stock [Member]
Equities:
Investments	1,069	918
Equity Securities [Member] | MSCI Emg Mkts Index Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Equities:
Investments		4,679
Equity Securities [Member] | MSCI Emg Mkts Index Fund [Member]
Equities:
Investments		4,679
Equity Securities [Member] | MSCI World Index Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Equities:
Investments		39,332
Equity Securities [Member] | MSCI World Index Fund [Member]
Equities:
Investments		39,332
Fixed Income Investments [Member] | Long US Credit Corp Index Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Equities:
Investments	42,911	24,830
Fixed Income Investments [Member] | Long US Credit Corp Index Fund [Member]
Equities:
Investments	42,911	24,830
Fixed Income Investments [Member] | Long US Govt Bond Index Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Equities:
Investments	24,116	8,269
Fixed Income Investments [Member] | Long US Govt Bond Index Fund [Member]
Equities:
Investments	24,116	8,269
Fixed Income Investments [Member] | Intermediate U.S. Govt Bond Index Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Equities:
Investments	18,884
Fixed Income Investments [Member] | Intermediate U.S. Govt Bond Index Fund [Member]
Equities:
Investments	18,884
Fixed Income Investments [Member] | Investment Grade Corporate Bond Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Equities:
Investments	8,118	9,637
Fixed Income Investments [Member] | Investment Grade Corporate Bond Funds [Member]
Equities:
Investments	8,118	9,637
Fixed Income Investments [Member] | Over 15y Gilts Index Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Equities:
Investments	3,814	5,626
Fixed Income Investments [Member] | Over 15y Gilts Index Fund [Member]
Equities:
Investments	3,814	5,626
Fixed Income Investments [Member] | Active Corp Bond - Over 10 Yr Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Equities:
Investments	7,065
Fixed Income Investments [Member] | Active Corp Bond - Over 10 Yr Fund [Member]
Equities:
Investments	7,065
Fixed Income Investments [Member] | Over 5y Index-Linked Gilts Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Equities:
Investments	11,352
Fixed Income Investments [Member] | Over 5y Index-Linked Gilts Fund [Member]
Equities:
Investments	11,352
Fixed Income Investments [Member] | Philippine Long Govt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Equities:
Investments	1,059
Fixed Income Investments [Member] | Philippine Long Govt Securities [Member]
Equities:
Investments	1,059
Fixed Income Investments [Member] | Philippine Long Corporate Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Equities:
Investments	781
Fixed Income Investments [Member] | Philippine Long Corporate Bonds [Member]
Equities:
Investments	781
Fixed Income Investments [Member] | High Yield Corporate Bond Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Equities:
Investments		5,792
Fixed Income Investments [Member] | High Yield Corporate Bond Funds [Member]
Equities:
Investments		5,792
Fixed Income Investments [Member] | Act Agg Long Dat 5050 Fixed Int Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Equities:
Investments		5,174
Fixed Income Investments [Member] | Act Agg Long Dat 5050 Fixed Int Fund [Member]
Equities:
Investments		5,174
Fixed Income Investments [Member] | AAA Fixed Int Over 15 Year Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Equities:
Investments		5,394
Fixed Income Investments [Member] | AAA Fixed Int Over 15 Year Fund [Member]
Equities:
Investments		5,394
Fixed Income Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Equities:
Investments		237
Cash and equivalents		3,478
Fixed Income Investments [Member]
Equities:
Investments		237
Cash and equivalents		3,478
Fair Value, Inputs, Level 1 [Member]
Equities:
Cash and equivalents	9,247
Total pension plan assets	20,274	14,270
Fair Value, Inputs, Level 2 [Member]
Equities:
Total pension plan assets	$ 121,310	$ 111,955