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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Gross number of share options (or share units) granted during the period.

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Number of shares issued during the period as a result of the conversion of convertible securities.

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Number of stock bought back by the entity at the exercise price or redemption price.

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Earnings Per Share - Dilutive Potential Common Shares (Details) - USD ($) $ in Thousands			1 Months Ended	3 Months Ended			12 Months Ended
	Nov. 01, 2018	May 16, 2013	Jan. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2019	May 06, 2020	May 05, 2020	Sep. 30, 2019	Mar. 31, 2018	Mar. 08, 2018	Jul. 20, 2017	Apr. 04, 2017
Earnings Per Share
Number of dilutive potential common stock				196,893,462		200,870,098
Number of preferred shares that had been converted to common stock			500		30,962
Principal amount											$ 100,000
Interest rate (as a percent)								9.50%	12.00%
$40M Convertible Senior Note
Earnings Per Share
Principal amount				$ 48,000	$ 48,000		$ 48,000			$ 40,000
Interest rate (as a percent)										7.50%
$100M Convertible Senior Notes
Earnings Per Share
Principal amount				$ 100,000	$ 100,000		$ 100,000			$ 1,000	$ 100,000	$ 100,000
Interest rate (as a percent)											5.50%
Warrants issued with the Amazon.com, Inc transaction agreement
Earnings Per Share
Shares of common stock that can be purchased from warrants issued (in shares)														55,286,696
Number of warrants exercised (in shares)				0
Warrants issued with the Walmart Stores, Inc transaction agreement
Earnings Per Share
Shares of common stock that can be purchased from warrants issued (in shares)													55,286,696
Number of warrants exercised (in shares)				0
Series C Preferred Stock
Earnings Per Share
Stock options granted		10,431
Conversion of preferred stock (in shares)				7,811
Series E Preferred Stock
Earnings Per Share
Conversion of preferred stock (in shares)	35,000						30,462
Number of preferred shares that had been converted to common stock			500
Number of redeemed shares							4,038
Stock options
Earnings Per Share
Number of dilutive potential common stock				19,803,872		21,109,998
Stock options granted				0		25,000
Restricted stock
Earnings Per Share
Number of dilutive potential common stock				4,600,227		2,372,347
Stock options granted				0		25,000
Warrants
Earnings Per Share
Number of dilutive potential common stock				110,573,392		115,824,142
Preferred stock
Earnings Per Share
Number of dilutive potential common stock				2,782,075		17,933,591
Convertible Senior Notes
Earnings Per Share
Number of dilutive potential common stock				59,133,896		43,630,020