Convertible and Other Debt	3 Months Ended
Mar. 31, 2021
Debt Disclosure [Abstract]
Convertible and Other Debt	4. Convertible and Other Debt The Company issued convertible promissory notes between December 2015 and May 2020 totaling $21.8 million, of which $2.0 million was with related parties. The convertible promissory notes accrued interest at 8% per annum with maturity dates of five years after issuance. The convertible promissory notes were settled in connection with the Company’s Series D financing in July 2020. As of March 31, 2021, the Company has $0.7 million outstanding under a promissory note issued pursuant to the Paycheck Protection Program (“PPP”) of the CARES Act. For the three months ended March 31, 2021 and 2020, the Company recognized interest expense related to its outstanding debt of $2,000 and $0.5 million, respectively.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-URI http://asc.fasb.org/topic&trid=2208564

Name:	us-gaap_DebtDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration