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Stockholders' Equity (Tables)
6 Months Ended
Jun. 30, 2017
Stockholders' Equity [Abstract]  
Schedule of activity under the stock option plans
  2000 Plan  2010 Plan  2017 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  -   130,000   -  $5.83     
Terminations  (5,000)  (7,000)  -  $5.56     
Exercises  (1,000)  -   -  $5.25     
                     
Outstanding at June 30, 2017  120,500   247,500   -  $4.52  $1,035,000 
Vested at June 30, 2017  120,500   41,500   -  $2.64  $760,000 
Vested and expected to vest at June 30, 2017  120,500   247,500   -  $4.52  $1,035,000 
Reserved for future grants  -   32,500   300,000         
Schedule of fair value stock option grant using black-scholes option valuation model with the weighted-average assumptions
  

Three-Month Period

Ended June 30, 2017

 

Six-Month Period

Ended June 30, 2017

 

Year Ended

December 31, 2016

Risk-free interest rate 1.8% 1.9% 1.2%
Dividend yield 0% 0% 0%
Expected volatility 61% 62% 63%
Expected life 6.5 years 6.5 years 6.5 years