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Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Loss Per Share [Abstract]
Potentially dilutive shares outstanding (in shares)	0		0
Numerator [Abstract]
Net loss	$ (15,038)	$ 8,451	$ (47,432)	$ 1,097
Denominator [Abstract]
Weighted-average number of common shares - basic and diluted (in shares)	23,646,192		19,335,541
Income per common share - basic and diluted (in dollars per share)	$ (0.64)		$ (2.45)

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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