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Fair Value Measurements - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Closing stock price	$ 0.21	$ 0.13
Long-term debt at fair value	$ 8.0	$ 8.9

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- References

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- Definition

Fair value portion of contractual obligation to pay money on demand or on fixed or determinable dates.

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- Definition

Price of a single share of a number of saleable stocks of a company.

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