Percentage of additional shares from common stock available for stock-based compensation.

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Share based compensation arrangement by share based payment award shares vesting date.

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Aggregate number of common shares reserved for future issuance.

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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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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of noncash expense for share-based payment arrangement.

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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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Discount rate from fair value on offering date that participants pay for shares.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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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 highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Sets forth the nature of any other increase or decrease in the number of shares reserved for issuance under the option plan.

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Percentage of vesting of award under share-based payment arrangement.

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Value, before forfeiture, of shares granted under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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Number, before forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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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		12 Months Ended
	Mar. 29, 2019	Nov. 30, 2018	Oct. 31, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Nov. 29, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Stock Options, Granted				725,000
Stock-based compensation				$ 1,264,231	$ 773,248
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average grant date fair value of stock options granted				$ 2.67	$ 4.63
Unrecognized compensation cost, stock options				$ 1,375,808
Unrecognized stock-based compensation expense, period for recognition				3 years 2 months 19 days
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation expense, period for recognition				2 years 11 months 1 day
Restricted stock authorized and granted			2,651
Restricted stock authorized and granted, value			$ 1,067
Weighted average grant date fair value of restricted stock award			$ 310.80
Restricted stock vesting period			4 years
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage			50.00%
Number of restricted shares vested				87,738
Unrecognized compensation expense				$ 843,770
Restricted Stock [Member] \| Forecast [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Remaining shares to be vested						213
Restricted Stock [Member] \| October 2016 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value of restricted shares that vested				648
Restricted Stock [Member] \| November 30, 2018 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value of restricted shares that vested				$ 159,032
Number of restricted shares vested				87,454
Executive Officer [Member] \| Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock authorized and granted		322,907
Weighted average grant date fair value of restricted stock award		$ 3.59
Restricted stock vesting period		4 years
Share-based compensation arrangement by share-based payment award, shares vesting date		Dec. 01, 2022
Executive Officer [Member] \| Restricted Stock [Member] \| One Year Anniversary [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage		25.00%
Executive Officer [Member] \| Restricted Stock [Member] \| 36 Substantially Equal Monthly Installments
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage		75.00%
Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Stock Options, Granted				725,000
2001 Employee Stock Option Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Stock Options, Granted				0
2007 Long Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Stock Options, Granted				0
2017 Omnibus Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance, description				The aggregate share reserve will be increased on January 1 of each year commencing in 2018 and ending on and including January 1, 2027 up to an amount equal to the lowest of (i) 4% of the total number of shares of common stock outstanding on a fully diluted basis as of December 31 of the immediately preceding calendar year, and (ii) such number of shares of common stock, if any, determined by the Company’s board of directors.
Percentage of additional shares from common stock available for stock-based compensation				4.00%
2017 Omnibus Incentive Plan [Member] \| Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for future issuance				1,500,000
2017 Omnibus Incentive Plan [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for future issuance				5,000,000
2017 Omnibus Incentive Plan [Member] \| Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for future issuance				83,373
2017 Omnibus Incentive Plan [Member] \| Common Stock [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock granted, shares				800,000
Stock granted value				$ 5,000,000
2017 Omnibus Incentive Plan [Member] \| Common Stock [Member] \| Maximum [Member] \| Director [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock granted, shares				500,000
2018 Inducement Grant Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for future issuance							2,000,000
2018 Inducement Grant Plan [Member] \| Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for future issuance				1,491,582
2019 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for future issuance	403,500
Percent of payroll deductions	10.00%
Percentage of discount from fair market value of common stock on first or last trading day of offering period	85.00%
Stock-based compensation				$ 21,608