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Note 14 - Share-based Compensation (Details Textual) - USD ($) |  |  |  |  | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 18 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 07, 2019 | Mar. 20, 2018 | Mar. 14, 2017 | Aug. 01, 2016 | Jun. 30, 2019 | Jun. 30, 2018 | Mar. 31, 2019 | Jun. 30, 2019 | Jun. 30, 2018 | Sep. 30, 2015 | Jun. 30, 2019 | Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance |  |  |  |  | 2,591,242 |  |  | 2,591,242 |  |  | 2,591,242 | 3,394,858
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance |  |  |  |  | $ 1.94 |  |  | $ 1.94 |  |  | $ 1.94 | $ 2.18
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term |  |  |  |  |  |  |  | 3 years 80 days |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value |  |  |  |  | $ 3,495,052 |  |  | $ 3,495,052 |  |  | $ 3,495,052 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value |  |  |  |  | $ 2,364,061 |  |  | $ 2,364,061 |  |  | $ 2,364,061 |
Share Price |  |  |  |  | $ 3.29 |  |  | $ 3.29 |  |  | $ 3.29 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value |  |  |  |  |  |  |  | $ 97,609 |  |  |  |
Proceeds from Stock Options Exercised |  |  |  |  |  |  |  | $ 54,621 | $ 1,027,719 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  |  |  |  |  |  | 0 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period |  |  |  |  |  |  |  | 7 years |  |  |  |
Share-based Payment Arrangement, Expense |  |  |  |  | $ 257,566 | $ 148,813 |  | $ 563,386 | 433,063 |  |  |
Share-based Payment Arrangement, Noncash Expense, Total |  |  |  |  |  |  |  | 563,386 | 433,063 |  |  |
Payments of Ordinary Dividends, Common Stock |  |  |  |  |  |  |  | $ 0 | 0 |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance |  |  |  |  | $ 1.31 |  |  | $ 1.31 |  |  | 1.31 |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance |  |  |  |  | $ 3.17 |  |  | $ 3.17 |  |  | $ 3.17 |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expense |  |  |  |  | $ 124,991 | $ 78,252 |  | $ 344,473 | $ 197,325 |  |  |
Share-based Payment Arrangement, Noncash Expense, Total |  |  |  |  |  |  | $ 210,176 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  |  |  |  |  |  |  | 249,300 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  |  |  |  |  | 3 years |  |  |  |  |
Restricted Stock Units (RSUs) [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Per Person |  | 25,000 | 25,000 |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Noncash Expense, Total |  | $ 278,750 | $ 197,500 |  |  |  |  |  |  |  |  |
Restricted Stock Units (RSUs) [Member] | Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  |  |  |  |  |  | 93,330 |  |  |  |  |
Restricted Stock Units (RSUs) [Member] | Non-employee Directors [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Options, Annual Grants, Gross | 30,000 |  |  |  |  |  |  |  |  |  |  |
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture | $ 412,500 |  |  |  |  |  |  |  |  |  |  |
Performance Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expense |  |  |  |  | 101,447 |  |  |  |  |  |  |
Performance Shares [Member] | Chief Executive Officer [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  |  | 750,000 |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period |  |  |  | 7 years |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Performance Criteria, Maximum Vested Per Year, Number |  |  |  | 375,000 |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total |  |  |  |  | $ 575,955 |  |  | $ 575,955 |  |  | $ 575,955 |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition |  |  |  |  |  |  |  |  |  |  | 1 year 18 days |
2015 Equity Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized |  |  |  |  |  |  |  |  |  | 5,000,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |  |  |  |  | 4,739,150 |  |  | 4,739,150 |  |  | 4,739,150 |
2015 Equity Plan [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance |  |  |  |  | 2,174,708 |  |  | 2,174,708 |  |  | 2,174,708 |
2005 Equity Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance |  |  |  |  | 691,383 |  |  | 691,383 |  |  | 691,383 |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |  |  |  |  | 1,873,059 |  |  | 1,873,059 |  |  | 1,873,059 |

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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