Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - Accounting Standards Update 2016-09 $ in Millions	9 Months Ended
Sep. 30, 2017 USD ($)
New Accounting Pronouncements
Deferred tax assets related to federal and state net operating losses	$ 0.2
Increase in valuation allowance	$ 0.2

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=75116654&loc=d3e32123-109318

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