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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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A unique description of a noncash or part noncash stock conversion. The description would be expected to include sufficient information to provide an understanding of the nature and purpose of the conversion. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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

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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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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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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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Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

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Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

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Stock-based Compensation - Additional Information (Details)		1 Months Ended	3 Months Ended	12 Months Ended
	Aug. 13, 2018	Oct. 31, 2019 shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) Tranche $ / shares shares	Dec. 31, 2021 shares	Dec. 31, 2020 shares	Apr. 12, 2018 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares issued \| shares			14,333,834	14,333,834	2,258,530
Conversion rights, description				Options generally vest ratably over 3 years. One quarter (1/4) of the options vest and become exercisable on the grant date. The remaining vest and become exercisable ratably on the first, second, and third anniversary of the date of grant.
Stock-based compensation expense \| $				$ 1,100,000	$ 500,000
Unrecognized stock based compensation expense related to unvested outstanding stock options \| $			$ 200,000	$ 200,000
Weighted average period of recognition				7 months 6 days
Weighted average grant-date fair value, Granted \| $ / shares				$ 0.35	$ 0.27
Fair value of options vested \| $				$ 1,200,000	$ 300,000
Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Conversion rights, description				During the year ended December 31, 2019, the Company agreed to issue 8,664 shares of common stock to settle a note payable and the associated accrued interest. As of December 31, 2019, the Company had not yet issued these shares, which were subsequently issued in 2020.
Warrants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Contingent warrants issued \| shares					999,999
Number of tranches \| Tranche					3
Warrants issued \| shares			333,333	333,333
Warrants outstanding \| $					$ 149,000
Class of warrant or rights, exercisable term			6 years	6 years
Warrant-based compensation expense \| $				$ 100,000	$ 32,000
Description of warrant				the Company issued warrants to purchase 999,999 shares of the Company’s common stock contingent on continued employment. The warrants vest in three tranches of 333,333 shares each year during 2019, 2020 and 2021. The fair value of the warrants issued was determined using the Black Scholes pricing model was $149,000, calculated with a six, seven and eight-year terms, respectively, 55%, 51% and 53% volatility, respectively, 2.8%, 2.85% and 2.87% discount rate, respectively, and the assumption of no dividends. During the years ended December 31, 2019 and 2018, the Company has recorded stock-based compensation expense of $0.1 million and $32,000, respectively, related to these warrants.
Warrants [Member] \| Volatility [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding, measurement input			0.55	0.55
Warrants [Member] \| Discount Rate [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding, measurement input			0.028	0.028
Warrants [Member] \| Dividend Rate [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding, measurement input			0	0
Warrants [Member] \| Forecast [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants issued \| shares						333,333	333,333
Class of warrant or rights, exercisable term						8 years	7 years
Warrants [Member] \| Forecast [Member] \| Volatility [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding, measurement input						0.53	0.51
Warrants [Member] \| Forecast [Member] \| Discount Rate [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding, measurement input						0.0287	0.0285
Warrants [Member] \| Forecast [Member] \| Dividend Rate [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding, measurement input						0	0
Warrants for Services [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants issued \| shares					161,100
Warrants outstanding \| $					$ 75,000
Class of warrant or rights, exercisable term					5 years
Description of warrant				the Company issued fully vested warrants to purchase 161,100 shares of the Company’s common stock for services. The fair value of the warrants issued was determined using the Black Scholes pricing model was $75,000. Calculated with a five-year term; 49% volatility; 2.85% discount rate and the assumption of no dividends
Warrants for Services [Member] \| Volatility [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding, measurement input					0.49
Warrants for Services [Member] \| Discount Rate [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding, measurement input					0.0285
Warrants for Services [Member] \| Dividend Rate [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants outstanding, measurement input					0
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Financing transactions, award grant \| $				$ 30,000,000
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares issued \| shares								4,250,000
Options available for grant \| shares								6,250,000
Stock options, vesting period	4 years			3 years
Stock Options [Member] \| Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense \| $			$ 400,000
Number of aggregate shares purchased \| shares		1,200,000		2,389,438
Stock Options [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options, term of award	10 years