Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Property and equipment, net of accumulated depreciation and amortization	$ 79,336	$ 72,649
Intangible assets, net of accumulated amortization	$ 807	$ 732
Common stock, outstanding shares (in shares)	1,747,990	471,177
Treasury stock, at cost shares (in shares)	111,003	1,901

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Number of previously issued common shares repurchased by the issuing entity and held in treasury.

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