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Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Parenthetical) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Mar. 31, 2019	Feb. 28, 2019	Dec. 31, 2019	Dec. 31, 2020
Discounts and commission				$ 5,040
Direct offering costs				$ 3,203
Series H Convertible Preferred Stock
Sale of stock, temporary equity, price per share	$ 1.15	$ 1.15
Issuance costs			$ 3

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Sale of stock, temporary equity, price per share.

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Temporary equity issuance costs.

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- Definition

Amount of deductions from cost to investors of capital shares or other capital units for fees, loads and other charges.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04.16(b)(3))
-URI http://asc.fasb.org/extlink&oid=120401414&loc=d3e603758-122996

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Cost to investors of each class of capital shares or other capital units.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section S99
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