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Stock Options (Stock Option Activity) (Details) - USD ($) | 12 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021
Stock Options [Abstract] |  |  |
Shares under option, number of shares (in shares) | 1,058,911 | 1,748,000 |
Exercised, number of shares (in shares) | (87,000) | (539,089) |
Forfeited, number of shares (in shares) | (51,000) | (150,000) |
Shares under option, number of shares (in shares) | 920,911 | 1,058,911 | 1,748,000
Exercisable, number of shares (in shares) | 532,245 | 264,577 |
Shares under option, stock options price range, lower limit (in dollars per share) | $ 1.73 | $ 1.73 |
Shares under option, stock options price range, upper limit (in dollars per share) | 2.92 | 6.00 |
Exercised, stock options price range, lower limit (in dollars per share) | 1.73 | 1.73 |
Exercised, stock options price range, upper limit (in dollars per share) | 2.65 | 6.00 |
Forfeited, stock options price range, lower limit (in dollars per share) | 1.73 | 1.73 |
Forfeited, stock options price range, upper limit (in dollars per share) | 2.65 | 2.65 |
Shares under option, stock options price range, lower limit (in dollars per share) | 1.73 | 1.73 | $ 1.73
Shares under option, stock options price range, upper limit (in dollars per share) | 2.92 | 2.92 | 6.00
Exercisable, stock options price range, lower limit (in dollars per share) | 1.73 | 1.73 |
Exercisable, stock options price range, upper limit (in dollars per share) | 2.92 | 2.92 |
Shares under option, weighted average exercise price (in dollars per share) | 2.18 | 2.29 |
Exercised, weighted average exercise price (in dollars per share) | 1.97 | 2.58 |
Forfeited, weighted average exercise price (in dollars per share) | 1.92 | 2.00 |
Shares under option, weighted average exercise price (in dollars per share) | 2.21 | 2.18 | $ 2.29
Exercisable, weighted average exercise price (in dollars per share) | $ 2.38 | $ 2.45 |
Shares under option, weighted average remaining contractual life (Year) | 2 years 2 months 15 days | 3 years 8 months 19 days | 4 years 10 months 9 days
Exercisable, weighted average remaining contractual life (Year) | 1 year 3 months 18 days | 2 years 21 days |
Shares under option, aggregate intrinsic value of in-the-money options | $ 1,373,117 | $ 5,055,797 | $ 36,594,280
Exercisable, aggregate intrinsic value of in-the-money options | $ 700,947 | $ 1,180,591 |

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- Definition Share-based Compensation Arrangements by Share-based Payment Award, Options, Outstanding, Exercise Price, Lower Limit + References No definition available. + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + 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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(02) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + 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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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