Composition of Certain Consolidated Financial Statement Items - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid Inventory	$ 310	$ 553
Prepaid Software	580	375
Prepaid Rent	252	245
Prepaid Insurance	447	124
Other Prepaid Expense, Current	643	356
Prepaid expenses and other current assets	$ 2,232	$ 1,653

Amount of asset related to consideration paid in advance for insurance that provides economic benefits within a future period of one year or the normal operating cycle, if longer.

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Name:	us-gaap_PrepaidInsurance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant