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Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2020
Fair Value Measurements [Abstract]  
Fair Value, Assets Measured on Recurring Basis

Recurring Fair Value Measurements

As of June 30, 2020

Level 1

Level 2

Level 3

Total

ASSETS:

Cash equivalents and restricted cash equivalents

$

4,303

$

-

$

-

$

4,303

Restricted certificates of deposit

$

3,855

$

-

$

-

$

3,855

Escrow receivable

$

-

$

-

$

930

$

930

Recurring Fair Value Measurements

As of December 31, 2019

Level 1

Level 2

Level 3

Total

ASSETS:

Cash equivalents and restricted cash equivalents

$

4,580

$

-

$

-

$

4,580

Restricted certificates of deposit

$

3,769

$

-

$

-

$

3,769

Escrow receivable

$

-

$

-

$

930

$

930