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Debt - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Debt Instrument [Line Items]
Interest expense	$ 400	$ 504
Unsecured promissory note
Debt Instrument [Line Items]
Interest expense	0	0
Secured term note
Debt Instrument [Line Items]
Interest expense	59	0
Secured term note payable - related party
Debt Instrument [Line Items]
Interest expense	20	42
Secured promissory note - related party
Debt Instrument [Line Items]
Interest expense	291	435
Insurance and other notes payable
Debt Instrument [Line Items]
Interest expense	$ 30	$ 27

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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

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- Definition

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

+ References

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