Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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EQUITY INCENTIVE PLAN (Summary of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Number of Options
Outstanding at beginning of period (in shares)			490,330
Granted (in shares)			325,050
Forfeited (in shares)			(24,147)
Outstanding at end of period (in shares)	791,233		791,233
Exercisable at end of period (in shares)	277,941		277,941
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share)			$ 8.30
Granted (in dollars per share)			2.13
Forfeited (in dollars per share)			5.04
Outstanding at end of period (in dollars per share)	$ 5.87		5.87
Exercisable at end of period (in dollars per share)	$ 10.40		$ 10.40
Stock-based compensation	$ 0.1	$ 0.1	$ 0.3	$ 0.3
Stock Options [Member]
Number of Options
Granted (in shares)				285,364
Forfeited (in shares)				(9,017)
Weighted-Average Exercise Price
Granted (in dollars per share)				$ 2.37
Forfeited (in dollars per share)				$ 6.92