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Debt - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Debt Instrument [Line Items]
Interest expense	$ 648	$ 309
Unsecured promissory note
Debt Instrument [Line Items]
Interest expense	0	4
Secured term note
Debt Instrument [Line Items]
Interest expense	176	0
Secured term note payable - related party
Debt Instrument [Line Items]
Interest expense	22	57
Secured promissory note - related party
Debt Instrument [Line Items]
Interest expense	409	224
Insurance and other notes payable
Debt Instrument [Line Items]
Interest expense	$ 41	$ 24

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

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