Net Loss Per Share (Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Antidilutive securities excluded from computation of earnings per share, amount	29,550	8,375	29,432	8,382
Convertible notes
Antidilutive securities excluded from computation of earnings per share, amount	25,507	4,435	25,510	4,435
Stock options
Antidilutive securities excluded from computation of earnings per share, amount	2,509	2,729	2,471	2,727
Restricted stock units (RSUs)
Antidilutive securities excluded from computation of earnings per share, amount	1,534	1,211	1,451	1,220