Percentage of commission rate gross sales price.

No definition available.

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- Definition

Public offering of common stock authorized for sale.

+ References

No definition available.

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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

The cash inflow associated with the amount received from the stock plan during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
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- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

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- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

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- Definition

Number of new stock issued during the period.

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Stockholders' Equity (Deficit) - Common Stock and Warrants - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended			3 Months Ended			9 Months Ended
	Feb. 08, 2021	Mar. 31, 2021	Feb. 28, 2021	Nov. 30, 2020	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2021
Common Stock [Member]
Class Of Stock [Line Items]
Proceeds from stock plans			$ 96.6
Shares issued for sale of common stock, net of cost, shares			59,459,460		28,770,000	125,000	92,870,000
Shares issued, price per share			$ 1.85
Warrant [Member]
Class Of Stock [Line Items]
Aggregate intrinsic value of options exercised								$ 1.1
2020 ATM Program [Member] \| Common Stock [Member]
Class Of Stock [Line Items]
Public offering of common stock authorized for sale				$ 50.0
Sale of stock, number of shares issued in transaction	28,600,689
Proceeds from stock plans	$ 48.1
2021 ATM Program [Member] \| Common Stock [Member]
Class Of Stock [Line Items]
Public offering of common stock authorized for sale		$ 100.0
Percentage of commission rate gross sales price		3.00%		3.00%			3.00%
Sale of stock, number of shares issued in transaction								33,705,315
Sale of stock, price Per share	$ 1.75				$ 1.21			$ 1.21
Proceeds from stock plans								$ 38.8