Per Share Data (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions		3 Months Ended		9 Months Ended
	Jul. 10, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		$ (121,000)	$ (145,000)	$ (514,000)	$ 235,000
Net Income (Loss) Attributable to Noncontrolling Interest		(1,000)	(4,000)	(9,000)	4,000
Net Income (Loss) Attributable to Parent		$ (120,000)	$ (141,000)	$ (505,000)	$ 231,000
Basic weighted average common shares outstanding		4,109	4,078	4,098	4,050
Diluted weighted average common shares outstanding		4,109	4,078	4,098	4,110
Basic net (loss) income per common share		$ (0.03)	$ (0.03)	$ (0.12)	$ 0.06
Diluted net (loss) income per common share		$ (0.03)	$ (0.03)	$ (0.12)	$ 0.06
Options and RSUs [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			96
Options and Restricted Stock Units [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Number of shares that had no effect on computation of dilutive weighted average number of shares outstanding		0	0	0	56
Warrant [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Number of shares that had no effect on computation of dilutive weighted average number of shares outstanding		0	0	0	4
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	55
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 5.25
Proceeds from Warrant Exercises	$ 287,000
Warrant [Member] | SoftBank [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Number of shares that had no effect on computation of dilutive weighted average number of shares outstanding				1
Employee Stock Option [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		72		72	6