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Stockholders' Equity (Details Textual) |  |  | 1 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
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Feb. 03, 2016 USD ($) $ / shares shares | Sep. 30, 1995 $ / shares | Dec. 21, 2017 USD ($) $ / shares shares | Jul. 27, 2017 USD ($) Investors $ / shares shares | Jun. 30, 2017 shares | Oct. 21, 2016 USD ($) $ / shares shares | Oct. 28, 2015 USD ($) | Jun. 30, 2010 shares | Jun. 30, 2000 shares | Jun. 30, 2018 USD ($) Employee $ / shares shares | Jun. 30, 2017 USD ($) $ / shares shares | Jun. 30, 2015 | Dec. 31, 2017 Employee $ / shares shares | Jun. 14, 2018 shares | Dec. 31, 2016 $ / shares | Jun. 15, 2016 shares | Jun. 30, 2001 shares
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Potential issuance or sale of equity | $ |  |  |  |  |  |  | $ 10,000,000 |  |  |  |  |  |  |  |  |  |
Gross proceeds | $ | $ 5,900,000 |  | $ 3,050,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds | $ | $ 5,313,000 |  | $ 2,734,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock shares sold | 1,123,810 |  | 417,807 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, per share | $ / shares | $ 5.25 |  | $ 7.30 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized |  |  |  |  |  |  |  |  |  | 11,000,000 |  |  | 8,000,000 |  |  |  |
Stock option and incentive plan, description |  |  |  |  |  |  |  |  |  | We currently match 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 | $ |  |  |  |  |  |  |  |  |  | $ 10,860 | $ 5,250 |  |  |  |  |  |
Weighted-average grant date fair values of options granted | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 3.51 |  |  |  |
Stock Options Granted [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock option granted during the period |  |  |  |  |  |  |  |  |  | 145,000 |  |  | 141,000 |  |  |  |
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 |  | 8,000,000 |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,000,000 |  | 10,000,000 |
Investor [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds | $ |  |  |  | $ 1,050,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds | $ |  |  |  | $ 1,034,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of related investors | Investors |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock shares issued |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Closing share price | $ / shares |  |  |  | $ 5.25 |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of employee exercised stock options | Employee |  |  |  |  |  |  |  |  |  |  |  |  | 6 |  |  |  |
Aggregate intrinsic value of options exercised | $ |  |  |  |  |  |  |  |  |  | $ 43,260 | $ 43,470 |  |  |  |  |  |
Weighted-average grant date fair values of options granted | $ / shares |  |  |  |  |  |  |  |  |  | $ 4.20 | $ 3.51 |  |  |  |  |  |
Total unrecognized stock-based compensation related to non-vested stock options | $ |  |  |  |  |  |  |  |  |  | $ 840,056 |  |  |  |  |  |  |
Share-based payment, description |  |  |  |  |  |  |  |  |  | Stock options covering 11,000 shares. Three thousand of these options were exercised for cash, resulting in total proceeds of $10,850, and 8,000 of these options were exercised by the surrender of 3,469 shares of common stock with a fair market value of $25,040 at the time of exercise and $10 in cash. |  |  | Exercised stock options covering 11,000 shares for cash, resulting in total proceeds of $49,560. |  |  |  |
Exercise prices of options outstanding | $ / shares |  |  |  |  |  |  |  |  |  | $ 5.40 |  |  | $ 4.58 |  | $ 3.89 |  |
Weighted average remaining life of unrecognized stock-based compensation related to non-vested |  |  |  |  |  |  |  |  |  | 2 years 2 months |  |  |  |  |  |  |
Stock Option [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, per share | $ / shares |  |  |  |  |  |  |  |  |  | $ 6.81 |  |  | 5.33 |  |  |  |
Exercise prices of options outstanding | $ / shares |  |  |  |  |  |  |  |  |  | 1.70 |  |  |  |  |  |  |
Stock Option [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, per share | $ / shares |  |  |  |  |  |  |  |  |  | 7.80 |  |  | $ 8.90 |  |  |  |
Exercise prices of options outstanding | $ / shares |  |  |  |  |  |  |  |  |  | $ 8.90 |  |  |  |  |  |  |
Stock Option [Member] | Employee [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of stock options exercised |  |  |  |  |  |  |  |  |  | 11,000 |  |  |  |  |  |  |
Number of employee exercised stock options | Employee |  |  |  |  |  |  |  |  |  | 4 |  |  |  |  |  |  |
2000 Plan [Member] | Stock Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock reserved for issuance under the plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of stock options exercised |  |  |  |  |  |  |  |  |  | 10,000 |  |  | 4,000 |  |  |  |
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 8 months |  |  |  |
Weighted average remaining life of options exercisable |  |  |  |  |  |  |  |  |  |  |  |  | 1 year 1 month |  |  |  |
2010 Plan [Member] | Stock Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock reserved for issuance under the plan |  |  |  |  |  |  |  |  |  | 1,000 |  |  |  |  |  |  |
Number of stock options exercised |  |  |  |  |  |  |  |  |  | 1,000 |  |  | 7,000 |  |  |  |
Stock option granted during the period |  |  |  |  |  |  |  |  |  | 38,500 |  |  | 141,000 |  |  |  |
2010 Plan [Member] | Stock Option [Member] | Employee [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock reserved for issuance under the plan |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |
Stock option expiration period |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |
Share-based payment, description |  |  |  |  |  |  |  | The 2010 Plan expires in June 2020, after which date no further options could be granted under the 2010 Plan. |  |  |  |  |  |  |  |  |
Option expiry date |  |  |  |  |  |  |  | Jun. 30, 2020 |  |  |  |  |  |  |  |  |
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). |  |  |  |  |  |  |  |  |  | Our Board of Directors also has voted to authorize amendments to increase the ownership threshold for determining ''Acquiring Person'' status to 20%. During the second quarter of 2015, our Board of Directors also voted to authorize an amendment to remove 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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 Plan [Member] | Stock Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock reserved for issuance under the plan |  |  |  |  |  |  |  |  |  | 198,500 |  |  |  |  |  |  |
Number of stock options exercised |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock option granted during the period |  |  |  |  |  |  |  |  |  | 106,500 |  |  |  |  |  |  |
2017 Plan [Member] | Stock Option [Member] | Employee [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock reserved for issuance under the plan |  |  |  |  | 300,000 |  |  |  |  |  | 300,000 |  |  |  |  |  |
Stock option expiration period |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Option expiry date |  |  |  |  | Mar. 31, 2027 |  |  |  |  |  |  |  |  |  |  |  |

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