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Stockholders’ Equity (Details Narrative) - USD ($) |  |  |  |  |  |  |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
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Dec. 12, 2021 | Sep. 05, 2021 | Jun. 03, 2021 | May 20, 2021 | May 13, 2021 | Apr. 12, 2021 | Jan. 21, 2021 | Jan. 18, 2021 | Jan. 05, 2021 | Dec. 12, 2019 | Jan. 24, 2019 | Sep. 05, 2018 | Jun. 30, 2021 | Apr. 03, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | May 19, 2021 | Apr. 12, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized |  |  |  |  |  |  |  |  |  |  |  |  | 50,000,000 |  | 50,000,000 |  | 50,000,000 |  |
Common Stock, Par or Stated Value Per Share |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.0005 |  | $ 0.0005 |  | $ 0.0005 |  |
Preferred Stock, Shares Authorized |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 |  | 1,000,000 |  | 1,000,000 |  |
Preferred Stock, Par or Stated Value Per Share |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.0005 |  | $ 0.0005 |  | $ 0.0005 |  |
Preferred Stock, Shares Issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |
Common Stock, Dividends, Per Share, Cash Paid |  |  |  |  | $ 0.30 |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |
Proceeds From Issuance Of Common Stock And Warrants From Private Offering |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,500,000 |  |  |  |
Two Thousand Ten Directors Equity Compensation Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  |  |  | 775,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 675,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number |  |  |  |  |  |  |  |  |  |  |  |  | 200,000 |  | 200,000 |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance |  |  |  |  |  |  |  |  |  |  |  |  | 228,126 |  | 228,126 |  |  |  |
Two Thousand Ten Equity Compensation Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  |  |  | 4,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,900,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 675,000 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number |  |  |  |  |  |  |  |  |  |  |  |  | 1,890,250 |  | 1,890,250 |  |  |  |
Shares Issued, Value, Share-based Payment Arrangement, before Forfeiture |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,973,000 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |  |  |  |  |  |  |  |  |  |  |  |  | 340,659 |  | 340,659 |  |  |  |
Share-based Payment Arrangement, Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,583,000 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |
Two Thousand Eighteen Stock Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,300,000
Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit |  |  |  |  |  | $ 3.00 |  |  |  |  |  |  |  |  |  |  |  |  |
Registered Direct Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  |  |  |  |  | 550,000 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  |  |  |  |  |  |  |  | 275,000 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  |  |  |  |  |  |  | $ 10.00 |  |  |  |  |  |  |  |  |  |
Proceeds From Issuance Of Common Stock And Warrants From Private Offering |  |  |  |  |  |  |  |  | $ 5,500,000 |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share |  |  |  |  |  |  |  |  | $ 11.00 |  |  |  |  |  |  |  |  |  |
IPO [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  |  |  |  | 3,000,000 |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  |  |  |  |  |  |  | 180,000 |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  |  |  |  |  |  | $ 15.625 |  |  |  |  |  |  |  |  |  |  |
Proceeds From Issuance Of Common Stock And Warrants From Private Offering |  |  |  |  |  |  | $ 35,100,000 |  |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Price Per Share |  |  |  |  |  |  |  | $ 12.50 |  |  |  |  |  |  |  |  |  |  |
CEO Options [Member] | Two Thousand Eighteen Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit |  | $ 2.00 | $ 1.20 |  |  |  |  |  |  | $ 1.50 | $ 1.75 |  |  |  |  |  |  |  |
Stock Option Plan Reduced Exercise Price Per Share Description | The exercise price of the CEO Option was further reduced from $ |  | The exercise price of the CEO Option was further reduced from $ |  |  |  |  |  |  |  | The exercise price of the CEO Option was further reduced from $ | exercise price of the CEO Option was reduced from $3.00 per share to $ |  |  |  |  |  |  |
CEO Options [Member] | Two Thousand Eighteen Stock [Member] | Stock Holders [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid |  |  | $ 0.30 |  |  |  |  |  |  | $ 0.25 | $ 0.25 | $ 1.00 |  |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments of Ordinary Dividends, Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,500,000 |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Director Fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 35,000 |  |  |  |
Common Stock [Member] | Two Thousand Ten Directors Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  |  |  |  |  |  |  |  |  |  |  | 9,709 |  | 18,055 |  |  |  |
Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expense |  |  |  |  |  |  |  |  |  |  |  |  | $ 105,000 |  | $ 193,000 |  |  |  |
Class of Warrant or Right, Outstanding |  |  |  |  |  |  |  |  |  |  |  |  | 905,000 |  | 905,000 |  |  |  |
Warrant [Member] | Registered Direct Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  |  |  |  |  |  |  |  |  |  |  |  | 275,000 |  | 275,000 |  |  |  |
Warrant [Member] | IPO [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  |  |  |  |  |  |  |  |  |  |  |  | 180,000 |  | 180,000 |  |  |  |

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