CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Convertible debt, equity component, deferred tax	$ 700	$ 6,200
Payments for common stock issuance costs	6,828	0
Issuance cost, equity component	2,100
Private Placement
Payments for common stock issuance costs	$ 6,800
Public Offering
Payments for common stock issuance costs		6,000
Convertible Senior Notes Due 2024
Convertible debt, equity component, deferred tax		3,000
Convertible Senior Notes Due 2026
Payments for common stock issuance costs		$ 900