Equity - Equity Incentive Plan (Details) - shares		12 Months Ended
May 08, 2019	Dec. 31, 2019	Dec. 31, 2018
Share-based compensation
Grants of stock options (in shares)		(1,328,718)	(224,000)
Stock option forfeitures (in shares)		77,937	337,583
Equity Incentive Plan [Member]
Share-based compensation
Number of common stock reserved for issuance		4,004,964
Reserved but unissued shares under the Consultant Plan at January 1		1,296,462	191,656
Increases in the number of authorized shares under the Consultant Plan	1,231,593	1,236,346	1,106,088
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	1,231,593	1,236,346	1,106,088
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum	15.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	4,004,214
Maximum increase in available number of authorized shares as a percentage of new shares issued		15.00%
Grants of stock options (in shares)		(1,328,718)	(224,000)
Stock option forfeitures (in shares)		77,937	337,583
Stock grants			(114,865)
Reserved but unissued shares under the Consultant Plan at Period End		1,282,027	1,296,462
Equity Incentive Plan [Member] \| Minimum [Member]
Share-based compensation
Purchase price (as a percent)		85.00%

It represents increase decrease in percentage of share based compensation.

No definition available.

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

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.

+ References

No definition available.

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- Definition

Net number of non-option equity instruments granted to participants.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

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

+ References

No definition available.

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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)-(4)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

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

+ References

No definition available.

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- Definition

Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.

+ References

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

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