Annual report pursuant to Section 13 and 15(d)

Note 5 - Capital Stock, Stock Plans, Warrants, and Stock Based Compensation (Details Textual)

v3.3.1.900
Note 5 - Capital Stock, Stock Plans, Warrants, and Stock Based Compensation (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Sep. 17, 2015
Aug. 02, 2013
Jul. 25, 2011
Sep. 29, 2010
Jul. 28, 2004
Jul. 29, 2003
May. 31, 2008
Dec. 31, 2015
Dec. 31, 2014
Employee Stock Option [Member] | The 2010 Stock Option Plan [Member] | Contractual Term with One-third Yearly Vesting [Member] | Chief Operating Officer [Member]                  
Share-based Compensation Maximum Contractual Term     6 years            
Employee Stock Option [Member] | The 2010 Stock Option Plan [Member] | Chief Operating Officer [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years            
Employee Stock Option [Member] | The 2003 Outside Directors Stock Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period           180 days      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period           10 years      
Employee Stock Option [Member] | Contractual Term with One-third Yearly Vesting [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period               3 years  
Share-based Compensation Maximum Contractual Term               6 years  
Employee Stock Option [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period               0 0
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term [1]                 6 years
Allocated Share-based Compensation Expense               $ 53,000 $ 14,000
Incentive Stock Options [Member] | The 2010 Stock Option Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term       5 years          
Share-based Compensation Arrangement by Share-based Payment Award Stockholder Percentage       10.00%          
Non-qualified Stock Options [Member] | The 2003 Outside Directors Stock Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period               3,423 2,577
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 180 days                
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years                
Stock Issued During Period, Shares, Share-based Compensation, Gross               3,423 2,577
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 4.19             $ 2.79 $ 2.79
Proceeds from Stock Options Exercised               $ 9,600 $ 7,200
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 12,000                
Director Stock Options [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term [1]               10 years 10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period               180 days  
Allocated Share-based Compensation Expense               $ 39,000 $ 48,000
Share-based Compensation Maximum Contractual Term               10 years  
The 2010 Stock Option Plan [Member] | Maximum [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term       10 years          
The 2010 Stock Option Plan [Member] | Chief Operating Officer [Member]                  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price     $ 7.85            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     60,000            
The 2010 Stock Option Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number       0          
Percentage of Fair Market Value of Common Stock to Determine Number of Shares to Directors       110.00%          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized       200,000          
Rights Plan [Member]                  
Date of Rights Expiration             May 02, 2018    
Common Stock Ownership Percentage Trigger for Share Rights             20.00%    
Share Multiplier for Common Stockholders not Part of Non-board Approved Shareholders             2    
Acquired Percentage of the Company that Triggers Share Rights             50.00%    
Purchase Price Multiplier for Common Stockholder When Acquired Percentage is Triggered             2    
Purchase Price of Rights             $ 13    
Purchase Price for Repurchase of Rights             $ 0.001    
The 2003 Outside Directors Stock Plan [Member] | Maximum [Member]                  
Share-base Compensation Arrangement by Share-based Payment Award Percentage of Stock in Lieu of Fee Payable           100.00%   100.00%  
The 2003 Outside Directors Stock Plan [Member] | Minimum [Member]                  
Share-base Compensation Arrangement by Share-based Payment Award Percentage of Stock in Lieu of Fee Payable           65.00%   65.00%  
The 2003 Outside Directors Stock Plan [Member] | Portion of Director Fees Earned in Common Stock [Member]                  
Allocated Share-based Compensation Expense               $ 269,000 $ 273,000
The 2003 Outside Directors Stock Plan [Member]                  
Percentage of Fair Market Value of Common Stock to Determine Number of Shares to Directors           75.00%   75.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized           800,000      
Stock Issued During Period, Shares, Share-based Compensation, Gross               71,324 67,335
Third Amendment to 2003 Outside Directors Stock Plan [Member] | Reduced to [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award Number of Options Granted Upon Initial Election to Board           6,000      
Share-based Compensation Arrangement by Share-based Payment Award Number of Options Granted Upon Re-electionto Board           2,400      
The 2004 Stock Option Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized         400,000        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term         10 years        
Robert Freguson and William Lampson Lenders [Member] | Warrant [Member]                  
Class of Warrant or Right, Outstanding               2  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   35,000           70,000  
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 2.23           $ 2.23  
Class of Warrant or Right, Issued During Period   2              
Due to Related Parties   $ 3,000,000              
Warrant Period from Which Warrants or Rights Exercisable   180 days              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period               3,423 2,577
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number [2]               169,533 167,223
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures               0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term [2]               4 years 182 days 4 years 73 days
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price               $ 4.19 $ 4.70
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit               2.79  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit               $ 14.75  
Allocated Share-based Compensation Expense               $ 92,000 $ 34,000
Stock Issued as Consideration for Debt   90,000              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant               288,200  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross               12,000 71,800
Reduction in Stock-based Compensation Expense                 $ 54,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized               $ 86,000  
Employee Service Share-based Compensation Nonvested Awards, Total Compensation Cost Not Yet Recognized, Next Twelve Months               67,000  
Employee Service Share-based Compensation Nonvested Awards, Total Compensation Cost not yet Recognized in Year Two               $ 19,000  
[1] The expected option life is based on historical exercises and post-vesting data.
[2] Options with exercise prices ranging from $2.79 to $14.75