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Stockholders' Equity (Details Textual)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Feb. 03, 2016
USD ($)
$ / shares
shares
Jan. 06, 2016
USD ($)
$ / shares
Sep. 30, 1995
$ / shares
Oct. 21, 2016
USD ($)
$ / shares
shares
Oct. 28, 2015
USD ($)
Jun. 30, 2010
shares
Jun. 30, 2000
shares
Mar. 31, 2017
Jun. 30, 2017
USD ($)
Director
$ / shares
shares
Jun. 30, 2016
USD ($)
$ / shares
Dec. 31, 2016
USD ($)
Employee
Director
$ / shares
shares
Jun. 15, 2016
shares
Dec. 31, 2015
$ / shares
Aug. 05, 2011
Jun. 06, 2008
Jun. 30, 2001
shares
Stockholders' Equity (Textual)                                
Potential issuance or sale of equity | $         $ 10,000,000                      
Gross proceeds | $ $ 5,900,000 $ 5,958,000                            
Net proceeds | $ $ 5,313,000                              
Common stock shares sold 1,123,810                              
Sale of stock, per share | $ / shares $ 5.25                              
Closing share price | $ / shares   $ 8.08                            
Common stock, shares authorized                 8,000,000   8,000,000          
Stock option and incentive plan, description                 August 2012, we have matched 100% of the first 3% of each employee's salary that is contributed to the Plan and 50% of the next 2% of each employee's salary that is contributed to the Plan.              
Proceeds from exercise of stock options | $                 $ 5,250 $ 3,150            
Exercise prices of options outstanding | $ / shares                 $ 4.52   $ 3.89   $ 3.57      
Employee stock, plan description                   On June 15, 2017, our Board of Directors voted to authorize an amendment to the Rights Agreement to extend the final expiration date by an additional five years to September 19, 2022.            
Private Placement [Member]                                
Stockholders' Equity (Textual)                                
Gross proceeds | $       $ 3,464,000                        
Net proceeds | $       $ 3,161,000                        
Common stock shares sold       659,880                        
Closing share price | $ / shares       $ 5.25                        
Minimum [Member]                                
Stockholders' Equity (Textual)                                
Common stock, shares authorized                       8,000,000        
Maximum [Member]                                
Stockholders' Equity (Textual)                                
Common stock, shares authorized                       10,000,000        
Employee [Member]                                
Stockholders' Equity (Textual)                                
Common stock reserved for issuance under the plan                 368,000              
Stock Option [Member]                                
Stockholders' Equity (Textual)                                
Aggregate intrinsic value of options exercised | $                 $ 350 $ 32,000            
Weighted-average grant date fair values of options granted | $ / shares                 $ 3.46 $ 4.16            
Weighted average remaining life of options exercisable                 2 years 8 months              
Total unrecognized stock-based compensation related to non-vested stock options | $                 $ 538,197              
Number of director exercised stock options | Director                 1   1          
Share-based payment, description                 Exercised stock options covering 1,000 shares for cash, resulting in total proceeds of $5,250.   The aggregate of 16,000 shares, of which 6,000 were exercised for cash, resulting in total proceeds of $31,900, and 10,000 of these options were exercised by the surrender of 7,334 shares of common stock with a fair market value of $57,425 at the time of exercise and $75 in cash.          
Stock Option [Member] | 46,000 stock options granted [Member]                                
Stockholders' Equity (Textual)                                
Stock option granted during the period                     46,000          
Stock Option [Member] | Minimum [Member]                                
Stockholders' Equity (Textual)                                
Sale of stock, per share | $ / shares                 $ 5.33              
Exercise prices of options outstanding | $ / shares                 1.70   $ 1.70          
Stock Option [Member] | Minimum [Member] | 46,000 stock options granted [Member]                                
Stockholders' Equity (Textual)                                
Exercise prices of options outstanding | $ / shares                     6.27          
Stock Option [Member] | Maximum [Member]                                
Stockholders' Equity (Textual)                                
Sale of stock, per share | $ / shares                 6.18              
Exercise prices of options outstanding | $ / shares                 $ 8.21   8.21          
Stock Option [Member] | Maximum [Member] | 46,000 stock options granted [Member]                                
Stockholders' Equity (Textual)                                
Exercise prices of options outstanding | $ / shares                     $ 8.21          
Stock Option [Member] | Employee [Member]                                
Stockholders' Equity (Textual)                                
Number of stock options exercised                     16,000          
Proceeds from exercise of stock options | $                     $ 31,900          
Number of employee exercised stock options | Employee                     1          
2000 Plan [Member] | Stock Option [Member]                                
Stockholders' Equity (Textual)                                
Common stock reserved for issuance under the plan                              
Number of stock options exercised                 (1,000)            
Stock option granted during the period                            
2000 Plan [Member] | Stock Option [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
Stock option expiration period             10 years   5 years 10 months              
Weighted average remaining life of options exercisable                 1 year 11 months              
2010 Plan [Member] | Stock Option [Member]                                
Stockholders' Equity (Textual)                                
Common stock reserved for issuance under the plan                 32,500              
Number of stock options exercised                   (16,000)          
Stock option granted during the period                 130,000   46,000          
2010 Plan [Member] | Stock Option [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     5 years 10 months              
Share-based payment, description           The 2010 Plan expires in June 2020, after which date no further options could be granted under the 2010 Plan.                    
Common Stock Rights Plan [Member]                                
Stockholders' Equity (Textual)                                
Share-based payment, description     At any time after a person or group becomes an Acquiring Person and prior to the acquisition by such person or group of 50% or more of the outstanding common stock, the Board of Directors of the Company may exchange the Rights (other than Rights owned by such person or group which have become void), in whole or in part, at an exchange ratio of one share of common stock per Right (subject to adjustment).                          
Common stock purchase price | $ / shares     $ 70.00                          
Employee stock, plan description     The Rights (as amended) become exercisable and transferable apart from the common stock upon the earlier of i) 10 days following a public announcement that a person or group (Acquiring Person) has, without the prior consent of the Continuing Directors (as such term is defined in the Rights Agreement), acquired beneficial ownership of 20% or more of the outstanding common stock or ii) 10 days following commencement of a tender offer or exchange offer the consummation of which would result in ownership by a person or group of 20% or more of the outstanding common stock (the earlier of such dates being called the Distribution Date).         During the second quarter of 2015, we amended our Common Stock Rights Plan by removing a provision that prevented a new group of directors elected following the emergence of an Acquiring Person (an owner of more than 20% of our stock) from controlling the Rights Plan by maintaining exclusive authority over the Rights Plan with pre-existing directors.                
Sale of common stock, description     The Company should consolidate or merge with any other entity and the Company were not the surviving company, or, if the Company were the surviving company, all or part of the Company's common stock were changed or exchanged into the securities of any other entity, or if more than 50% of the Company's assets or earning power were sold.                          
Outstanding rights price per share | $ / shares     $ 0.005                          
Common Stock Rights Plan [Member] | Minimum [Member]                                
Stockholders' Equity (Textual)                                
Ownership percentage                           18.00% 15.00%  
Common Stock Rights Plan [Member] | Maximum [Member]                                
Stockholders' Equity (Textual)                                
Ownership percentage                           20.00% 18.00%  
2017 Plan [Member] | Stock Option [Member]                                
Stockholders' Equity (Textual)                                
Common stock reserved for issuance under the plan                 300,000              
Number of stock options exercised                            
Stock option granted during the period                            
2017 Plan [Member] | Stock Option [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