Condensed Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock ($.001 Par Value)	Paid-In Capital in Excess of Par	Retained Earnings (Accumulated Deficit)
Beginning balance, shares at Dec. 31, 2020		49,999,999
Beginning balance at Dec. 31, 2020	$ 1,053,668	$ 50	$ 1,104,276	$ (50,658)
Stock-based compensation, value	19,172		19,172
Tax withholding for stock compensation plans, value	(1,467)		(1,467)
Issued pursuant to exercise of warrants, shares		5,620
Issued pursuant to exercise of warrants, value	195	$ 0	195
Net loss	(69,642)			(69,642)
Ending balance, shares at Mar. 31, 2021		50,005,619
Ending balance at Mar. 31, 2021	$ 1,001,926	$ 50	1,122,176	(120,300)
Beginning balance, shares at Dec. 31, 2021	50,193,656	50,193,656
Beginning balance at Dec. 31, 2021	$ 1,135,390	$ 50	1,129,996	5,344
Issued pursuant to stock compensation plans, shares		141,581
Issued pursuant to stock compensation plans, value	0	$ 0
Stock-based compensation, value	3,142		3,142
Tax withholding for stock compensation plans, value	$ (58)		(58)
Issued pursuant to exercise of warrants, shares	207,810	14,153
Issued pursuant to exercise of warrants, value	$ 47	$ 0	47
Net loss	$ (872)			(872)
Ending balance, shares at Mar. 31, 2022	50,349,390	50,349,390
Ending balance at Mar. 31, 2022	$ 1,137,649	$ 50	$ 1,133,127	$ 4,472