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Note 7 - Shareholders' Equity (Details) - Stock option activity (USD $)
In Thousands, except Share data, unless otherwise specified
 1 Months Ended 9 Months Ended
Jan. 31, 2011
Mar. 30, 2008
Dec. 31, 2005
Sep. 29, 2013
Stock option activity [Abstract]        
Shares under option at January 1, 2013       2,211,488
Shares under option at January 1, 2013 (in Dollars per share)       $ 7.47
Options granted 50,000 50,000 48,000 228,000
Options granted (in Dollars per share)       $ 3.60
Options exercised       (3,000)
Options exercised (in Dollars per share)       $ 3.91
Options forfeited       (114,348)
Options forfeited (in Dollars per share)       $ 3.51
Options expired       (175,718)
Options expired (in Dollars per share)       $ 10.80
Shares under option at September 29, 2013       2,146,422
Shares under option at September 29, 2013 (in Dollars per share)       $ 7.00
Shares under option at September 29, 2013       4 years 208 days
Shares under option at September 29, 2013 (in Dollars)       $ 134
Vested and expected to vest as of September 29, 2013       1,944,424
Vested and expected to vest as of September 29, 2013 (in Dollars per share)       $ 7.22
Vested and expected to vest as of September 29, 2013       4 years 6 months
Vested and expected to vest as of September 29, 2013 (in Dollars)       109
Options exercisable at September 29, 2013       991,953
Options exercisable at September 29, 2013 (in Dollars per share)       $ 6.52
Options exercisable at September 29, 2013       3 years 175 days
Options exercisable at September 29, 2013 (in Dollars)       $ 44