Earnings (Loss) Per Common Share (Reconciliation of Earnings (loss) Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended			5 Months Ended	6 Months Ended
	Jun. 30, 2020	May 31, 2020	Jun. 30, 2021	Mar. 31, 2021	Mar. 31, 2020	May 31, 2020	Jun. 30, 2021
Numerator:
Net loss (numerator for basic EPS)	$ (9,817)	$ (35,121)	$ (14,619)	$ (16,942)	$ (69,104)	$ (104,225)	$ (31,561)
Interest on Convertible Notes, net of tax	0	0	0			0	0
Numerator for diluted EPS, if-converted method	$ (9,817)	$ (35,121)	$ (14,619)			$ (104,225)	$ (31,561)
Denominator:
Weighted-average shares (denominator for basic EPS)	1,048,000	79,288,000	1,217,000			78,968,000	1,178,000
Potentially dilutive shares issuable from Convertible Notes, if-converted method	0	0	0			0	0
Potentially dilutive shares issuable from outstanding stock-based compensation awards, treasury stock method	0	0	0			0	0
Denominator for diluted EPS	1,048,000	79,288,000	1,217,000			78,968,000	1,178,000
Loss per common share - Basic	$ (9.37)	$ (0.44)	$ (12.01)			$ (1.32)	$ (26.79)
Loss per common share - Diluted	$ (9.37)	$ (0.44)	$ (12.01)			$ (1.32)	$ (26.79)
Potentially dilutive securities excluded as anti-dilutive	9,733,000	4,103,000	10,204,000			4,517,000	10,113,000
Restricted Stock [Member]
Denominator:
Nonvested Options, Vested in Period, Weighted Average Grant Date Price			$ 9.69
Restricted Stock [Member] | Director
Denominator:
Awards granted			110,417
Restricted Stock [Member] | Employee
Denominator:
Awards granted			83,000