Represents the maximum aggregate offering price of common stock.

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- Definition

Represents replacement shelf registration.

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No definition available.

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Face amount or stated value per share of common stock.

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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The cash inflow from the additional capital contribution to the entity.

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- Definition

Amount after tax of reclassification adjustments of other comprehensive income (loss).

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- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

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Number of new stock issued during the period.

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Note 10 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
	Oct. 12, 2018	Sep. 30, 2018	Mar. 31, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Common Stock, Shares Authorized		160,000		160,000		160,000
Common Stock, Par or Stated Value Per Share		$ 0.0013		$ 0.0013		$ 0.0013
Preferred Stock, Shares Authorized		20,000		20,000		20,000
Preferred Stock, Par or Stated Value Per Share		$ 0.001		$ 0.001		$ 0.001
Replacement Shelf Registration			$ 250,000
Common Stock Sales Agreement with Agent, Maximum Aggregate Offering Price			$ 75,000
Proceeds from Issuance of Common Stock		$ 70,000
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				$ 0	$ 0
Subsequent Event [Member]
Replacement Shelf Registration	$ 250,000
Common Stock Sales Agreement with Agent, Maximum Aggregate Offering Price	$ 75,000
Public Offering [Member]
Proceeds from Issuance of Common Stock		$ 70,000		$ 69,987
Stock Issued During Period, Shares, New Issues		9,100
Shares Issued, Price Per Share		$ 8.25		$ 8.25
At-the-market Offering [Member]
Proceeds from Issuance of Common Stock		$ 4,800		$ 29,653
Stock Issued During Period, Shares, New Issues		600
Shares Issued, Price Per Share		$ 8.36		$ 8.36
Payments of Stock Issuance Costs		$ 4,800