Debt (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Summary of Outstanding Debt

All of the convertible notes, as such convertible notes are discussed below, were repaid-in-full during the three months ended March 31, 2021. The fair value and face value principal of outstanding convertible notes at December 31, 2020 were as follows:

	Contractual Maturity Date	Stated Interest Rate			Conversion Price per Share		Face Value Principal Outstanding		Fair Value
November 2019 Senior Secured Convertible Note	September 30, 2021		7.875	%	$	1.60	$	956	$	1,270
April 2020 Senior Convertible Note	April 30, 2022		7.875	%	$	5.00	$	4,111	$	4,600
August 2020 Senior Secured Convertible Note	August 6, 2022		7.875	%	$	5.00	$	7,750	$	8,790
Balance as of December 31, 2020							$	12,817	$	14,660

Schedule of Senior Convertible Note Estimated Fair Value

A reconciliation of the fair value of the convertible notes for the year ended December 31, 2021 is as follows:

	November 2019 Senior Secured Convertible Notes			April 2020 Senior Convertible Note			August 2020 Senior Secured Convertible Note			Sum of Balance Sheet Fair Value Components			Other Income (Expense)
Fair Value - December 31, 2020	$	1,270		$	4,600		$	8,790		$	14,660		$	—
Installment repayments – common stock		(956	)		—			—			(956	)		—
Non-installment payments – common stock		(7	)		—			—			(7	)		—
Non-installment payments – cash		—			(52	)		(102	)		(154	)		—
Change in fair value		(307	)		(437	)		(938	)		(1,682	)		1,682
Principal repayments - cash		—			(4,111	)		(7,750	)		(11,861	)		—
Fair Value at December 31, 2021(1)	$	—		$	—		$	—		$	—
Other Income (Expense) - Change in fair value – year ended December 31, 2021(1)													$	1,682

⁽¹⁾ As discussed above, all remaining convertible notes were previously repaid during the three months ended March 31, 2021.

A reconciliation of the fair value of the convertible notes for the year ended December 31, 2020 is as follows:

	December 2018 Senior Secured Convertible Note			November 2019 Senior Secured Convertible Notes			April 2020 Senior Convertible Note			August 2020 Senior Secured Convertible Note			Sum of Balance Sheet Fair Value Components			Other Income (Expense)
Fair Value - December 31, 2019	$	1,700		$	6,439		$	—		$	—		$	8,139		$	—
Face value principal – issue date		—			7,000			4,111			7,750			18,861			—
Fair value adjustment – issue date		—			2,600			(411	)		(750	)		1,439			(1,439	)
Installment repayments – common stock		(1,692	)		(13,044	)		—			—			(14,736	)		—
Non-installment payments – common stock		(6	)		(464	)		—			—			(470	)		—
Non-installment payments – cash		—			(138	)		(216	)		(246	)		(600	)		—
Change in fair value		(2	)		(1,123	)		1,116			2,036			2,027			(2,027	)
Lender Fees:
November 2019 Senior Secured Convertible Note - Series B;		—			—			—			—			—			(700	)
April 2020 Senior Convertible Note; and		—			—			—			—			—			(411	)
August 2020 Senior Secured Convertible Note		—			—			—			—			—			(750	)
Fair Value at December 31, 2020	$	—		$	1,270		$	4,600		$	8,790		$	14,660
Other Income (Expense) - Change in fair value – year ended December 31, 2020																$	(5,327	)