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Stockholders’ Equity (Details Narrative) - USD ($) |  |  |  |  |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 28, 2021 | Feb. 27, 2020 | Nov. 18, 2019 | Mar. 06, 2017 | Nov. 13, 2015 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2018 | Jun. 30, 2016 | Apr. 30, 2014
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  | $ 0.50 |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  | $ 3,416,115 |  |  |  |
Proceeds from issuance of common stock |  |  |  |  |  |  |  | $ 26,840,457 | $ 5,653,140 |  |  |
Class of warrant or right, redemption price of warrants or rights |  |  |  |  | $ 63.96 |  |  | $ 0.001 |  |  |  |
Allocated share-based compensation expense |  |  |  |  |  | $ 146,747 | $ 465,058 | $ 294,313 | 786,971 |  |  |
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized |  |  |  |  |  | $ 1,100,000 |  | $ 1,100,000 |  |  |  |
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition |  |  |  |  |  |  |  | 2 years 2 months 15 days |  |  |  |
Fair value adjustment of warrants |  |  |  |  |  |  |  | $ (26,257) | 3,166,474 |  |  |
Proceeds from exercise of warrants |  |  |  |  |  |  | $ 6,900,000 | $ 5,000 | $ 6,914,158 |  |  |
Stock Incentive Plan2014 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, number of shares authorized |  |  |  |  |  | 5,721,906 |  | 5,721,906 |  |  |  | 1,000,000
Share-based compensation arrangement by share-based payment award, number of shares available for grant |  |  |  |  |  | 1,584,874 |  | 1,584,874 |  |  |  |
Contractual life |  |  |  |  |  |  |  | 10 years |  |  |  |
Stock Incentive Plan2014 [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, number of shares authorized |  |  |  |  |  |  | 3,221,906 |  | 3,221,906 | 2,471,906 | 1,271,906 |
Stock Incentive Plan2014 [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, number of shares authorized |  |  |  |  |  |  | 5,721,906 |  | 5,721,906 | 3,221,906 | 2,471,906 |
Equity Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, number of shares available for grant |  |  |  |  |  |  |  |  |  |  |  | 271,906
Share-based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, options, grants in period, gross |  |  |  |  |  | 66,000 | 113,000 | 376,000 | 739,000 |  |  |
Share-based compensation arrangement by share-based payment award, options, exercises in period |  |  |  |  |  | 0 | 0 | 4,584 | 0 |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues |  |  |  |  |  |  |  | 1,811,238 |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  | $ 181 |  |  |  |
Share-based compensation arrangement by share-based payment award, options, exercises in period |  |  |  |  |  |  |  | 4,584 |  |  |  |
Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Issued |  |  |  |  |  |  |  |  |  |  |  |
Common warrants to purchase share of our common stock |  |  |  |  |  | 0 |  | 10,000 |  |  |  |
Proceeds from exercise of warrants |  |  |  |  |  |  | $ 0 |  | $ 5,000 |  |  |
Common Stock Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from exercise of warrants |  |  |  |  |  |  | 13,497,807 |  | 13,618,807 |  |  |
Sales Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of gross proceeds on sale of shares |  |  |  | 300.00% |  |  |  |  |  |  |  |
January2021 Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock, gross | $ 28,700,000 |  |  |  |  |  |  |  |  |  |  |
Agent fees and other offering expenses | $ 1,900,000 |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues | 16,428,571 |  |  |  |  |  |  |  |  |  |  |
February2020 Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock, gross |  | $ 6,000,000.0 |  |  |  |  |  |  |  |  |  |
Agent fees and other offering expenses |  | $ 347,000 |  |  |  |  |  |  |  |  |  |
Issued |  |  |  |  |  |  |  | 5,042,017 |  |  |  |
February2020 Offering [Member] | Class A Unit [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues |  | 10,084,034 |  |  |  |  |  |  |  |  |  |
Shares issued, price per share |  | $ 0.595 |  |  |  |  |  |  |  |  |  |
February2020 Offering [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares issued, price per share |  | $ 0.53 |  |  |  |  |  |  |  |  |  |
November 2019 Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock, gross |  |  | $ 6,000,000.0 |  |  |  |  |  |  |  |  |
Agent fees and other offering expenses |  |  | $ 404,000 |  |  |  |  |  |  |  |  |
Warrants outstanding |  |  |  |  |  | 1,094,030 |  | 1,094,030 |  |  |  |
Fair value adjustment of warrants |  |  |  |  |  | $ 221,000 | $ 2,100,000 | $ 26,000 | $ 3,200,000 |  |  |
November 2019 Offering [Member] | Class A Unit [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues |  |  | 10,450,000 |  |  |  |  |  |  |  |  |
Shares issued, price per share |  |  | $ 0.50 |  |  |  |  |  |  |  |  |
November 2019 Offering [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  | $ 768,000 |  |  |  |  |  |  |  |  |
November 2019 Offering [Member] | Class B Units [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues |  |  | 1,550,000 |  |  |  |  |  |  |  |  |
Shares issued, price per share |  |  | $ 0.4999 |  |  |  |  |  |  |  |  |
November 2019 Offering [Member] | Pre Funded Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares issued, price per share |  |  | $ 0.0001 |  |  |  |  |  |  |  |  |
November 2019 Offering [Member] | Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  | $ 4,800,000 |  |  |  |  |  |  |  |  |
At Market Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock, gross |  |  |  |  |  |  |  | $ 32,900,000 |  |  |  |
Stock issued during period, shares, new issues |  |  |  |  |  |  |  | 15,023,073 |  |  |  |
Shares issued, price per share |  |  |  |  |  | $ 2.19 |  | $ 2.19 |  |  |  |
At Market Offering [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues |  |  |  |  |  |  |  | 1,811,238 |  |  |  |
Accredited Investors [Member] |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock, gross |  |  |  |  |  |  |  | $ 41,200,000 |  |  |  |
Shares issued, price per share |  |  |  |  |  | $ 1.95 |  | $ 1.95 |  |  |  |
Proceeds from issuance of common stock |  |  |  |  |  |  |  | $ 112,000 |  |  |  |

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