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Stockholders' Equity (Details Textual)
1 Months Ended 12 Months Ended
Jun. 30, 2010
shares
Jun. 30, 2000
shares
Dec. 31, 2015
USD ($)
Employee
$ / shares
shares
Dec. 31, 2014
USD ($)
Employee
$ / shares
shares
Dec. 31, 2013
USD ($)
Employee
$ / shares
shares
Sep. 19, 2014
Dec. 31, 2012
$ / shares
Sep. 19, 2011
Jun. 30, 2001
shares
Stockholders' Equity (Textual)                  
Total proceeds from exercise of stock options | $     $ 120,210 $ 3,149 $ 21,750        
Percentage of outstanding common stock     50.00%            
Redemption price per share | $ / shares     $ 0.005            
Minimum [Member]                  
Stockholders' Equity (Textual)                  
Equity method investment ownership percentage           18.00%   15.00%  
Maximum [Member]                  
Stockholders' Equity (Textual)                  
Equity method investment ownership percentage           20.00%   18.00%  
Employee [Member]                  
Stockholders' Equity (Textual)                  
Common stock reserved for issuance under the plan     238,000            
Common Stock Rights Plan [Member]                  
Stockholders' Equity (Textual)                  
Initial purchase price of common stock | $ / shares     $ 70.00            
Percentage of outstanding common stock     50.00%            
Stock Option [Member]                  
Stockholders' Equity (Textual)                  
Exercise prices of options outstanding | $ / shares     $ 3.57 $ 3.42 $ 3.3   $ 3.13    
Aggregate intrinsic value of options exercised | $     $ 110,000 $ 1,000 $ 8,000        
Weighted-average grant date fair values of options granted | $ / shares     $ 3.46 $ 2.26 $ 2.23        
Total unrecognized stock-based compensation related to non-vested stock options | $     $ 120,619            
Outstanding non-vested stock options cost expected to be recognized | $     $ 43,116            
Stock Option [Member] | 16,000 stock options granted [Member]                  
Stockholders' Equity (Textual)                  
Stock option granted during the period     16,000            
Stock Option [Member] | 25,000 stock options granted [Member]                  
Stockholders' Equity (Textual)                  
Stock option granted during the period       25,000          
Stock Option [Member] | 26,000 stock options granted [Member]                  
Stockholders' Equity (Textual)                  
Stock option granted during the period         26,000        
Stock Option [Member] | Minimum [Member]                  
Stockholders' Equity (Textual)                  
Exercise prices of options outstanding | $ / shares     $ 1.70            
Stock Option [Member] | Minimum [Member] | 16,000 stock options granted [Member]                  
Stockholders' Equity (Textual)                  
Exercise prices of options outstanding | $ / shares     6.05            
Stock Option [Member] | Minimum [Member] | 25,000 stock options granted [Member]                  
Stockholders' Equity (Textual)                  
Exercise prices of options outstanding | $ / shares       $ 4.25          
Stock Option [Member] | Minimum [Member] | 26,000 stock options granted [Member]                  
Stockholders' Equity (Textual)                  
Exercise prices of options outstanding | $ / shares         $ 4.15        
Stock Option [Member] | Maximum [Member]                  
Stockholders' Equity (Textual)                  
Exercise prices of options outstanding | $ / shares     7.54            
Stock Option [Member] | Maximum [Member] | 16,000 stock options granted [Member]                  
Stockholders' Equity (Textual)                  
Exercise prices of options outstanding | $ / shares     $ 7.54            
Stock Option [Member] | Maximum [Member] | 25,000 stock options granted [Member]                  
Stockholders' Equity (Textual)                  
Exercise prices of options outstanding | $ / shares       $ 4.80          
Stock Option [Member] | Maximum [Member] | 26,000 stock options granted [Member]                  
Stockholders' Equity (Textual)                  
Exercise prices of options outstanding | $ / shares         $ 4.69        
Stock Option [Member] | Employee [Member]                  
Stockholders' Equity (Textual)                  
Number of employee exercised stock options | Employee     11 1 4        
Number of stock options exercised     28,000 1,000 7,000        
Total proceeds from exercise of stock options | $     $ 120,210 $ 3,149 $ 21,750        
Stock Option [Member] | 2000 Plan [Member]                  
Stockholders' Equity (Textual)                  
Common stock reserved for issuance under the plan     0            
Number of stock options exercised     (26,000) 0 (6,000)        
Stock option granted during the period     0 0 0        
Stock Option [Member] | 2000 Plan [Member] | Employee [Member]                  
Stockholders' Equity (Textual)                  
Stock option and incentive plan description   No less than 85% of fair market value on the date of grant in the case of non-qualified stock options.              
Common stock reserved for issuance under the plan   250,000             500,000
Weighted average remaining life of options outstanding     4 years 3 months            
Weighted average remaining life of options exercisable     3 years            
Stock Option [Member] | 2010 Plan [Member]                  
Stockholders' Equity (Textual)                  
Common stock reserved for issuance under the plan     189,500            
Number of stock options exercised     (2,000) (1,000) (1,000)        
Stock option granted during the period     16,000 25,000 26,000        
Stock Option [Member] | 2010 Plan [Member] | Employee [Member]                  
Stockholders' Equity (Textual)                  
Stock option and incentive plan description No less than 85% of fair market value on the date of grant in the case of non-qualified stock options.                
Common stock reserved for issuance under the plan 300,000                
Stock option expiration period 10 years                
Weighted average remaining life of options outstanding     4 years 3 months            
Weighted average remaining life of options exercisable     3 years