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Note 8 - Shareholders' Equity Option Rollforward (Details Narrative) - USD ($)
 6 Months Ended
Jun. 28, 2015
Dec. 31, 2014
Note 8 - Shareholders Equity Option Rollforward Details Narrative    
Options outstanding 2,262,956 2,056,122
Options outstanding - weighted average exercise price $ 6.13 $ 6.66
Options outstanding - weighted average remaining contractual term (years) 3 years 296 days  
Options outstanding - aggregate intrinsic value $ 369,000  
Options granted 277,000  
Options granted - weighted average exercise price $ 3.72  
Options exercised 2,667  
Options exercised - weighted average exercise price $ 3.22  
Options forfeited or expired 67,499  
Options forfeited or expired - weighted average exercise price $ 12.3  
Options vested and expected to vest 2,115,226  
Options vested and expected to vest - weighted average exercise price $ 6.3  
Options vested and expected to vest - weighted average remaining contractual term (years) 3 years 245 days  
Options vested and expected to vest - aggregate intrinsic value $ 314,000  
Options Exercisable 1,337,295  
Options exercisable - weighted average exercise price $ 5.16  
Options exercisable - weighted average remaining contractual term (years) 2 years 288 days  
Options exercisable - aggregate intrinsic value $ 153,000