Debt (Tables)

3 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Convertible Debt [Table Text Block]

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

	March 31, 2021		December 31, 2020
3.25% convertible senior notes due 2023*	$	37,708	$	34,134

* The amounts presented for the 3.25% convertible senior notes due 2023 within the table represent the fair value as of March 31, 2021 and December 31, 2020 (see Note 16 - Fair Value Measurements). The principal amount of these notes is $20.0 million and $22.9 million as of March 31, 2021 and December 31, 2020, respectively. The accrued, but unpaid, PIK interest is $0.9 million as of March 31, 2021 and December 31, 2020.

Schedule of Debt [Table Text Block]

Term loan consists of the following (in thousands):

	March 31, 2021							December 31, 2020
	Principal Amount**		Debt Discount/ Issuance Costs*			Net Amount		Principal Amount**		Debt Discount/ Issuance Costs*			Net Amount
Term Loan	$	119,801	$	(7,491	)	$	112,310	$	119,801	$	(8,471	)	$	111,330

* 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.

** The amount presented excludes accrued, but unpaid, PIK interest of $5.5 million and $4.7 million as of March 31, 2021 and December 31, 2020, respectively.