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Net Loss Per Share (Computation of Loss Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Numerators:
Loss from continuing operations attributable to common stockholders									$ (13,513)	$ (13,664)	$ (20,117)
Preferred stock dividends and accretion									0	0	(1,524)
Net loss attributable to common shareholders									$ (13,513)	$ (13,664)	$ (21,641)
Denominator:
Weighted-average common shares outstanding, basic and diluted (in shares)									16,472,799	14,939,601	4,889,901
Loss from continuing operations per share, basic and diluted (in USD per share)									$ (0.82)	$ (0.91)	$ (4.43)
Loss from discontinued operations per share, basic and diluted (in USD per share)									0.00	0.00	0.00
Net loss per common share, basic and diluted (in USD per share)	$ (0.12)	$ (0.14)	$ (0.22)	$ (0.36)	$ (0.28)	$ (0.16)	$ (0.22)	$ (0.25)	$ (0.82)	$ (0.91)	$ (4.43)

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Per basic and diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation, when the per share amount is the same.

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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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Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=68079674&loc=SL4569616-111683

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The amount of net income (loss) from continuing operations per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares.

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1377-109256

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The aggregate value of preferred stock dividends and other adjustments necessary to derive net income apportioned to common stockholders.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1377-109256

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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