Stockholders' Equity (Schedule of Stock Option Activity) (Details)	12 Months Ended
Dec. 31, 2016 $ / shares shares
Shares
Outstanding, beginning balance \| shares	113,672
Granted \| shares	190,151
Exercised \| shares
Forfeited/Expired \| shares	(37,013)
Outstanding, ending balance \| shares	266,810
Weighted Average Exercise Price
Outstanding, beginning balance \| $ / shares	$ 39.32
Granted \| $ / shares	7.88
Exercised \| $ / shares
Forfeited/Expired \| $ / shares	20.18
Outstanding, ending balance \| $ / shares	$ 19.57

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(4)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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