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Debt (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Convertible Debt [Table Text Block]

Convertible senior notes consist of the following (in thousands):

December 31, 2021

December 31, 2020

Principal/

Debt

Principal/

Debt

Fair Value

Issuance

Net

Fair Value

Issuance

Net

Amount

Costs

Amount

Amount

Costs

Amount

3.25% convertible senior notes due 2023 *

$

—

$

—

$

—

$

34,134

$

—

$

34,134

*The amounts presented for the 3.25% convertible senior notes due 2023 within the table represent the fair value as of December 31, 2020 (see Note 16 - Fair Value Measurements). The principal amount of these notes is $22.9 million as of December 31, 2020. The accrued, but unpaid, payment-in-kind interest is $0.9 million as of December 31, 2020.

Schedule of Long-term Debt Instruments [Table Text Block]

		Year ended December 31,
		2021				2020				2019
Contractual interest expense		$	—			$	32			$	3,370
Amortization of debt issuance costs recognized as interest expense			—				—				460
		$	—			$	32			$	3,830

		Year ended December 31,
		2021				2020				2019
Contractual interest expense		$	—			$	—			$	580

		Year ended December 31,
		2021				2020				2019
Contractual interest expense		$	620			$	2,004			$	899

Schedule of Debt [Table Text Block]

Term loan consists of the following (in thousands):

		December 31, 2021												December 31, 2020
						Debt Discount/												Debt Discount/
		Principal				Issuance				Net				Principal				Issuance				Net
		Amount				Costs*				Amount				Amount**				Costs*				Amount
2019 Recap Term Loan		$	—			$	—			$	—			$	119,801			$	(8,471	)		$	111,330
2021 BSP Term Loan			98,505				(2,986	)			95,519				—				—				—

* The term loan was valued using the discounted cash flow method to determine the implied debt discount. The debt discount and issuance costs are being amortized over the life of the term loan on a straight-line basis which approximates the effective interest method.

** The amount presented excludes accrued, but unpaid, PIK interest of $4.7 million as of December 31, 2020.

Schedule of Maturities of Long-term Debt [Table Text Block]

The aggregate principal amount of long-term debt maturing in the next five years and thereafter is as follows:

			2021 BSP Term Loan
2022	*		$	2,104
2023				2,475
2024				2,475
2025				2,475
2026				2,475
Thereafter				86,501
			$	98,505

*Represents the Company’s current portion of principal amortization payments for the 2021 BSP Term Loan.

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