Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share, Basic [Abstract]
Numerator for basic loss per share	$ (15,292)	$ (34,453)
Denominator for basic loss per share (in shares)	43,924,404	42,178,397
Basic income (loss) per common share (in dollars per share)	$ (0.35)	$ (0.82)
Earnings Per Share, Diluted [Abstract]
Numerator for basic loss per share	$ (15,292)	$ (34,453)
Warrant revaluation income (expense) for dilutive warrants	1,958	1,529
Numerator for diluted loss per share	$ (17,250)	$ (35,982)
Denominator for basic loss per share (in shares)	43,924,404	42,178,397
Incremental shares underlying in the money warrants outstanding (in shares)	18,017	172,949
Denominator for diluted loss per share (in shares)	43,942,421	42,351,346
Diluted net income (loss) per share (in dollars per share)	$ (0.39)	$ (0.85)

Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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