Share-Based Compensation (Details Narrative) - USD ($)	9 Months Ended
Sep. 30, 2023	Dec. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of award outstanding	4,044,504	2,516,924
Share-based compensation arrangement by share-based payment award, options, outstanding, intrinsic value	$ 6,909,000	$ 6,917,000
Share-based compensation arrangement by share-based payment award, options, exercisable, intrinsic value	$ 4,605,000
Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of award outstanding	773,195
Unrecognized compensation expense	$ 2,900,000
Share based compensation arrangement by share based payment award unrecognized compensation costs	$ 0
HRGN Amended And Restate Equity Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting period	4 years
Share-based compensation arrangement by share-based payment award, expiration period	10 years
Share-based compensation arrangement by share-based payment award, number of shares authorized	9,098,000
Number of shares available for issuance	5,035,775
Unrecognized compensation expense	$ 4,400,000
Share-based compensation arrangement by share-based payment award, options, outstanding, intrinsic value	6,900,000
Share-based compensation arrangement by share-based payment award, options, exercisable, intrinsic value	$ 4,600,000
Share price	$ 5.36
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	2 years 5 months 4 days

Amount of share based compensation arrangement by share based payment award unrecognized compensation costs.

No definition available.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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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.

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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Number of options outstanding, including both vested and non-vested options.

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Price of a single share of a number of saleable stocks of a company.

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No definition available.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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