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NOTE 11 - SHARE-BASED COMPENSATION (Tables)
12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Share-based compensation
    Year Ended December 31,  
    2019     2018  
(in thousands)            
Cost of goods sold   $ 28     $ 25  
Research and development     288       266  
Selling, general and administrative     855       939  
Total share-based compensation   $ 1,171     $ 1,230  
Fair value of share-based awards for employee stock options
    Employee Stock  
    Options  
    2019     2018  
             
Risk-free interest rates     2.31 %     N/A  
Volatility factors     62.05 %     N/A  
Expected life of the option in years     4.0       N/A  
Expected dividend yield   None       N/A  
Stock option activity
    2019     2018  
    Options     Weighted-Average Exercise Price     Weighted-Average Remaining Contractual Life in Years     Options     Weighted-Average Exercise Price     Weighted-Average Remaining Contractual Life in Years  
                                     
Outstanding at beginning of year     25,000     $ 8.03             40,000     $ 6.10        
Granted     25,000       4.98             -       -        
Exercised     -       0.00             (15,000 )     2.83        
Cancelled, Expired or                                            
Forfeited     (25,000 )     8.03             -       -        
Outstanding at end of year     25,000     $ 4.98       5.34       25,000     $ 8.03       4.50  
                                                 
Vested or expected to vest at the end of the period     24,723     $ 4.98       5.34       22,924     $ 8.03       4.50  
Exercisable at end of year     12,500     $ 4.98       5.34       7,813     $ 8.03       4.50  
Restricted stock award including performance-based stock award activity under our share-based compensation plan
    2019     2018  
    Awards     Weighted - Average Grant Date Fair Value     Awards     Weighted - Average Grant Date Fair Value  
Outstanding at beginning of year     558,856     $ 6.06       565,850     $ 5.09  
   Granted     276,700       4.57       206,856       7.11  
   Vested     (224,089 )     5.30       (213,100 )     4.51  
   Cancelled     (75,064 )     7.30       (750 )     4.24  
Outstanding at end of year     536,403     $ 5.44       558,856     $ 6.06  
Unamortized compensation expense
   

December 31,

2019

   

December 31,

2018

 
             
Unamortized future compensation expense   $ 2,351,324     $ 2,835,978  
Remaining weighted average amortization period in years     2.40       2.63