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Stockholders’ Equity (Details Narrative) - USD ($) |  |  |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 28, 2021 | Feb. 27, 2020 | Nov. 18, 2019 | Mar. 06, 2017 | Nov. 13, 2015 | Dec. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2020 | Jun. 30, 2018 | Jun. 30, 2016 | Apr. 30, 2014
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock sold through ATM offering |  |  |  |  |  | $ 3,406,053 | $ 9,004,368 |  |  |  |
[custom:SharesAvailableForFutureIssuance-0] |  |  |  |  |  | $ 41,200,000 |  |  |  |  |
[custom:ClassOfWarrantsOrRightRedemptionPriceOfWarrantsOrRights] |  |  |  |  | $ 63.96 | $ 0.001 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value |  |  |  |  |  | $ 315,330 |  |  |  |  |
Fair Value Adjustment of Warrants |  |  |  |  |  | (355,890) | 2,892,189 |  |  |  |
Net proceeds from exercise of warrants |  |  |  |  |  | 5,000 | 7,674,876 |  |  |  |
Share-based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value |  |  |  |  |  | $ 2,000 | $ 0 |  |  |  |
Share-based compensation arrangement by share-based payment award, options, exercises in period |  |  |  |  |  | 4,584 | 0 |  |  |  |
Stock Incentive Plan 2014 [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, number of shares authorized |  |  |  |  |  | 5,721,906 |  |  |  |  | 1,000,000
Share-based compensation arrangement by share-based payment award, number of shares available for grant |  |  |  |  |  | 857,459 |  |  |  |  |
Contractual life |  |  |  |  |  | 10 years |  |  |  |  |
Stock Incentive Plan 2014 [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 | 2,471,906 | 1,271,906 |
Stock Incentive Plan 2014 [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 | 3,221,906 | 2,471,906 |
2011 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
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of shares issued |  |  |  |  |  | 1,811,238 | 6,576,300 |  |  |  |
Common stock sold through ATM offering |  |  |  |  |  | $ 181 | $ 658 |  |  |  |
Share-based compensation arrangement by share-based payment award, options, exercises in period |  |  |  |  |  | 4,584 |  |  |  |  |
Common Stock Warrant [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised |  |  |  |  |  | 10,000 | 15,100,000 |  |  |  |
Net proceeds from exercise of warrants |  |  |  |  |  | $ 5,000 | $ 7,700,000 |  |  |  |
Sales Agreement [Member] | Cantor [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock sold through ATM offering |  |  |  | $ 500,000.0 |  |  |  |  |  |  |
Percentage of gross proceeds on sale of shares |  |  |  | 3.00% |  |  |  |  |  |  |
January 2021 Offering [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock gross | $ 28,700,000 |  |  |  |  |  |  |  |  |  |
Payment of stock issuance costs | $ 1,900,000 |  |  |  |  |  |  |  |  |  |
Number of shares issued | 16,428,571 |  |  |  |  |  |  |  |  |  |
February 2020 Offering [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock gross |  | $ 6,000,000.0 |  |  |  |  |  |  |  |  |
Payment of stock issuance costs |  | $ 347,000 |  |  |  |  |  |  |  |  |
Issued |  |  |  |  |  | 5,042,017 |  |  |  |  |
February 2020 Offering [Member] | Class A Unit [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of shares issued |  | 10,084,034 |  |  |  |  |  |  |  |  |
Share issued exercise price per share |  | $ 0.595 |  |  |  |  |  |  |  |  |
February 2020 Offering [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share issued exercise 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 |  |  |  |  |  |  |  |
Payment of stock issuance costs |  |  | $ 404,000 |  |  |  |  |  |  |  |
Warrants outstanding |  |  |  |  |  | 1,094,030 |  |  |  |  |
Fair Value Adjustment of Warrants |  |  |  |  |  | $ 356,000 | 2,900,000 |  |  |  |
November 2019 Offering [Member] | Class A Unit [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of shares issued |  |  | 10,450,000 |  |  |  |  |  |  |  |
November 2019 Offering [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share issued exercise price per share |  |  | $ 0.50 |  |  |  |  |  |  |  |
Common stock sold through ATM offering |  |  | $ 768,000 |  |  |  |  |  |  |  |
November 2019 Offering [Member] | Class B Units [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of shares issued |  |  | 1,550,000 |  |  |  |  |  |  |  |
Share issued exercise price per share |  |  | $ 0.4999 |  |  |  |  |  |  |  |
November 2019 Offering [Member] | Pre Funded Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share issued exercise price per share |  |  | 0.0001 |  |  |  |  |  |  |  |
Warrant exercise price per share |  |  | $ 0.50 |  |  |  |  |  |  |  |
November 2019 Offering [Member] | Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock sold through ATM offering |  |  | $ 4,800,000 |  |  |  |  |  |  |  |
ATM Market Offering [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock gross |  |  |  |  |  | $ 32,900,000 |  |  |  |  |
Number of shares issued |  |  |  |  |  | 15,023,073 |  |  |  |  |
Share issued exercise price per share |  |  |  |  |  | $ 2.19 |  |  |  |  |
Proceeds from Issuance or Sale of Equity |  |  |  |  |  | $ 31,700,000 |  |  |  |  |
ATM Market Offering [Member] | Sales Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payment of stock issuance costs |  |  |  |  |  | $ 112,000 | $ 148,000 |  |  |  |
Number of shares issued |  |  |  |  |  | 1,811,238 | 3,746,300 |  |  |  |
Share issued exercise price per share |  |  |  |  |  | $ 1.95 | $ 1.41 |  |  |  |
ATM Market Offering [Member] | Sale Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity |  |  |  |  |  | $ 3,400,000 | $ 5,100,000 |  |  |  |
ATM Market Offering [Member] | Sale Agreement [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock gross |  |  |  |  |  |  | 3,900,000 |  |  |  |
Payment of stock issuance costs |  |  |  |  |  |  | $ 165,000 |  |  |  |
Number of shares issued |  |  |  |  |  |  | 2,830,000 |  |  |  |
Share issued exercise price per share |  |  |  |  |  |  | $ 1.43 |  |  |  |

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