Significant Customers (Tables)

9 Months Ended

Sep. 30, 2021

Concentration Risk [Line Items]

Schedule of Stockholders' Equity Note, Warrants or Rights

Issued and outstanding warrants are summarized below as of September 30, 2021:

			Common Shares in millions
	Lease Commitment	Exercise price	Vested	Non-Vested	Expiration
2018 Investment Agreement	10 aircraft	$21.53	14.8	0.0	December 20, 2025
2018 Investment Agreement	12 aircraft	$20.40	5.3	1.8	December 20, 2025

Accounts Receivable [Member]

Concentration Risk [Line Items]

Schedule of Revenue by Major Customers by Reporting Segments

The accounts receivable from the Company's three largest customers as of September 30, 2021, and December 31, 2020, are as follows (in thousands):

	September 30,		December 31,
	2021		2020
Customer	Accounts Receivable
DoD	$	53,648	$	32,625
Amazon	68,903		55,997
DHL	15,546		10,471

Revenue, Product and Service Benchmark [Member]

Concentration Risk [Line Items]

Schedule of Revenue by Major Customers by Reporting Segments

The percentage of the Company's revenues for the Company's three largest customers, for the three and nine month periods ending September 30, 2021 and 2020 are as follows:

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2021	2020	2021	2020
Customer	Percentage of Revenue		Percentage of Revenue
DoD	31%	33%	26%	33%
Amazon	33%	29%	35%	29%
DHL	12%	13%	13%	12%