Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30)(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Summary of Significant Accounting Policies - Recently Issued Accounting Pronouncements (Details) - USD ($)	Dec. 31, 2017	Jan. 01, 2017	Dec. 31, 2016
Recently Issued Accounting Pronouncements
Additional Paid in Capital	$ 294,999,000		$ 276,127,000
Retained Earnings (Accumulated Deficit)	(26,823,000)		(84,288,000)
Deferred Tax Assets, Net, Noncurrent	$ 20,843,000		$ 41,729,000
ASU 2016-09 \| Cumulative Effect Adjustment
Recently Issued Accounting Pronouncements
Additional Paid in Capital		$ 211,000
Retained Earnings (Accumulated Deficit)		211,000
ASU 2016-09 \| Deferred Tax Asset Adjustment
Recently Issued Accounting Pronouncements
Retained Earnings (Accumulated Deficit)		392,000
Deferred Tax Assets, Net, Noncurrent		$ 392,000