Class of warrant or right reduction.

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Reduction in value of warrants.

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Share based compensation arrangement by share based payment award accelerated vesting value.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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The amount of plan compensation cost recognized during the period.

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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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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

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The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

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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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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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Gross number of share options (or share units) granted during the period.

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No definition available.

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

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Number of shares for which recognition of cost was accelerated for award under share-based payment arrangement.

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No definition available.

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Expected term of 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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Number of shares issued during the period as a result of an employee stock purchase plan.

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Number of new stock issued during the period.

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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Aggregate change in value for stock issued during the period as a result of employee stock purchase plan.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Aggregate value of stock related to Restricted Stock Awards issued during the period.

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Stock-Based Compensation - Additional Information (Detail) - USD ($)	1 Months Ended				9 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Feb. 01, 2020	Jun. 30, 2019	Oct. 31, 2020	Sep. 30, 2019	May 02, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding under equity incentive plans					180,000
Stock-based compensation expense					$ 673,000
Stock options granted under equity incentive plans			0		180,000
Stock issued during period, values					$ 216,000
Reduction in value of warrants					89,000
Compensation expense					$ 127,000
Expected life					5 years
Risk-free interest rate, minimum					0.20%
Risk-free interest rate, maximum					0.30%
Expected dividend yield					0.00%
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted		1,068,000
Expected annualized volatility rate					95.00%
Immediate Vesting Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life					2 years 6 months
Graded Vested Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life					3 years 3 months 14 days
Termination of Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted				5,357
Number of shares granted, value				$ 108,000
Directors and Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted						60,000
Number of shares granted, value						$ 1,560,000
Stock-based compensation expense						$ 1,774,000
Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted shares granted						10,000
Total value of restricted stock award						$ 260,000
Stock options granted under equity incentive plans					180,000
Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted					295,000
Number of shares granted, value					$ 390,000
Board of Directors [Member] \| Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted	80,000,000
Number of shares granted, value	$ 106,000
Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			$ 7,000		$ 77,000
Restricted Stock Award [Member] \| Termination of Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested in period				2,667
Number of shares vested in period, value				$ 69,000
Restricted Stock Award [Member] \| Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted, vesting period						2 years
Unregistered Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, shares					300,000
Reduction of warrants					300,000
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					$ 79,000
2015 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding under equity incentive plans							180,000
Common stock available for future issuance							263,000
2015 Equity Incentive Plan [Member] \| Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding under unvested restricted shares							3,000