Fair value warrants issued per share basis

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- Definition

Liability of the Fair Value of Warrants to be issued

+ References

No definition available.

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- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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- Definition

Number of warrants or rights outstanding.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Amount of expense (income) related to adjustment to fair value of warrant liability.

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Significant Customers (Details) - USD ($) shares in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
Accounts receivable	$ 162,870,000				$ 147,755,000				$ 162,870,000	$ 147,755,000
Fair Value Adjustment of Warrants	(72,900,000)	$ 92,000,000.0	$ (35,900,000)	$ 4,500,000	(21,400,000)	$ 17,900,000	$ 11,700,000	$ (900,000)	(2,300,000)	7,400,000	$ (81,800,000)
Warrant liability	383,073,000				203,782,000				$ 383,073,000	$ 203,782,000
DHL [Member] \| Revenues from Leases and Contracted Services [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Percentage of consolidated revenues									14.00%	26.00%	24.00%
DHL [Member] \| Revenue from customers excluding revenue from reimbursed expenses [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Percentage of consolidated revenues											30.00%
DHL [Member] \| Accounts Receivable [Member]
Concentration Risk [Line Items]
Accounts receivable	12,700,000				13,400,000				$ 12,700,000	$ 13,400,000
Amazon [Member] \| Revenues from Leases and Contracted Services [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Percentage of consolidated revenues									23.00%	27.00%	44.00%
Amazon [Member] \| Revenue from customers excluding revenue from reimbursed expenses [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Percentage of consolidated revenues											27.00%
Amazon [Member] \| Accounts Receivable [Member]
Concentration Risk [Line Items]
Accounts receivable	50,100,000				29,200,000				$ 50,100,000	$ 29,200,000
US Military [Member] \| Revenues from Leases and Contracted Services [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Percentage of consolidated revenues									34.00%	15.00%	7.00%
US Military [Member] \| Revenue from customers excluding revenue from reimbursed expenses [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Percentage of consolidated revenues											10.00%
US Military [Member] \| Accounts Receivable [Member]
Concentration Risk [Line Items]
Accounts receivable	44,500,000				50,500,000				$ 44,500,000	$ 50,500,000
Amazon Warrant AB [Member]
Concentration Risk [Line Items]
Fair value warrants issued	$ 13.93				$ 13.76				$ 13.93	$ 13.76
Class of Warrant or Right, Outstanding	14,830								14,830
Warrant liability	$ (206,600,000)								$ (206,600,000)
Amazon Warrant C [Member] [Member]
Concentration Risk [Line Items]
Fair value warrants issued	$ 9.30								$ 9.30
Class of Warrant or Right, Outstanding	24,700								24,700
Warrant liability	$ (176,500,000)								$ (176,500,000)