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Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2020
Fair Value Measurements [Abstract]  
Fair Value, Assets Measured on Recurring Basis and Non-Recurring Basis

Recurring Fair Value Measurements

As of December 31, 2020

Level 1

Level 2

Level 3

Total

Assets:

Cash equivalents

$

7,993

$

-

$

-

$

7,993

Restricted certificates of deposit

$

182

$

-

$

-

$

182

Liabilities:

Warrant liability

$

-

$

12,730

$

-

$

12,730

Non-recurring Fair Value Measurements

During the Year-Ended December 31, 2020

Level 1

Level 2

Level 3

Total

Assets:

Assets held for sale

$

-

$

-

$

10,383

$

10,383

Right of use assets

$

-

$

-

$

28,960

$

28,960

Property, plant and equipment, net

$

-

$

-

$

11,515

$

11,515

Railcars available for lease, net

$

-

$

-

$

13,175

$

13,175

Recurring Fair Value Measurements

As of December 31, 2019

Level 1

Level 2

Level 3

Total

Assets:

Cash equivalents

$

4,580

$

-

$

-

$

4,580

Restricted certificates of deposit

$

3,769

$

-

$

-

$

3,769

Escrow receivable

$

-

$

-

$

930

$

930