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The fair value per share of common stock used in the weighted average fair value assumptions for stock option grants.

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The term of consulting agreement, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The termination notice period for business development consulting services.

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Adjustment for noncash service expenses paid for by granting of warrants.

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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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Costs of sales and operating expenses for the period incurred from transactions with related parties.

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Amount of transactions with related party during the financial reporting 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 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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Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

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- Definition

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

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

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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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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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Related Party Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Oct. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 21, 2020
Related Party Transaction [Abstract]
Termination notice period for business development consulting services agreement		60 days
Term of consulting agreement		3 years
Expense in connection with warrant issue		$ 26,562	$ 0	$ 0
Common Stock Warrant [Member]
Related Party Transaction [Abstract]
Expense in connection with warrant issue		$ 26,600
Fair Value Assumptions [Abstract]
Risk-free interest rate		0.95%
Expected term		10 years
Expected volatility		74.20%
Expected dividend yield		0.00%
Exercise price (in dollars per share)		$ 57.11
Fair value of common stock (in dollars per share)		$ 57.11
Restricted Stock Units (RSU) [Member]
Related Party Transaction [Abstract]
Shares granted (in shares)		20,000
Warrants Exercisable for Common Shares [Member]
Related Party Transaction [Abstract]
Warrant issued (in shares)					603,386
Member of the Board of Directors - One [Member]
Related Party Transaction [Abstract]
Business development consulting services expense (per quarter)		$ 28
Termination notice period for business development consulting services agreement		14 days
Related party expenses		$ 100	$ 100	$ 100
Member of the Board of Directors - Two [Member]
Related Party Transaction [Abstract]
Term of consulting agreement		1 year
Number of options granted (in shares)		9,784
Fair value amount of options granted		$ 100
Spouse of Executive officer [Member] \| Restricted Stock Units (RSU) [Member]
Related Party Transaction [Abstract]
Shares granted (in shares)	10,000
Vesting period		3 years