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Stockholders' Equity (Tables)
 3 Months Ended
Mar. 31, 2017
Stockholders' Equity [Abstract]  
Schedule of activity under the stock option plans
    2000 Plan     2010 Plan     Weighted 
Average 
Exercise 
Price		    

Aggregate

Intrinsic

Value(1)

  
Outstanding at December 31, 2015     131,500       106,500     $ 3.57     $ 945,000  
Grants     -       46,000     $ 6.98          
Terminations     (5,000 )     (12,000 )   $ 6.16          
Exercises     -       (16,000 )   $ 5.59          
Outstanding at December 31, 2016     126,500       124,500     $ 3.89     $ 517,000  
Grants     -       124,000     $ 5.84          
Terminations     (5,000 )     (1,000 )   $ 4.90          
Exercises     (1,000 )     -     $ 5.25          
Outstanding at March 31, 2017     120,500       247,500     $ 4.53     $ 369,000  
Vested at March 31, 2017     120,500       41,500     $ 2.64     $ 468,000  
Vested and expected to vest at March 31, 2017     120,500       247,500     $ 4.53     $ 369,000  
Reserved for future grants     -       32,500                  

 

(1) Intrinsic value is the difference between the fair market value as of the date indicated and as of the date of the option grant.
Schedule of fair value stock option grant using black-scholes option valuation model with the weighted-average assumptions

  

Three-Month Period

Ended 
March 31,

  

Year Ended

December 31,

 
  2017  2016 
Risk-free interest rate  1.9%  1.2%
Dividend yield  0%  0%
Expected volatility  62%  63%
Expected life  6.5 years   6.5 years