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Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2018
Fair Value Disclosures [Abstract]  
Financial Instruments Measured at Fair Value Measured on Recurring Basis

The following table presents financial instruments measured at fair value measured on a recurring basis:

 

 

 

June 30, 2018

 

(In millions)

 

Carrying value

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

Warrant liability

 

$

0.4

 

 

 

—

 

 

 

—

 

 

$

0.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

December 31, 2017

 

 

 

Carrying value

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

Cash and cash equivalents - money market fund

 

$

0.5

 

 

$

0.5

 

 

$

—

 

 

$

—

 

Warrant liability

 

 

0.4

 

 

 

—

 

 

 

—

 

 

 

0.4