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Related Party Transactions - Convertible Notes (Details) $ in Thousands		3 Months Ended	4 Months Ended	12 Months Ended
	Mar. 31, 2015 item shares	Mar. 31, 2015 USD ($) item	Feb. 18, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Related Party Transactions
Proceeds from issuance of convertible notes | $				$ 2,651	$ 5,560	$ 390
Convertible Notes
Related Party Transactions
Proceeds from issuance of convertible notes | $		$ 2,000	$ 2,700
Convertible Notes | Series A Convertible Preferred Stock.
Related Party Transactions
Amount of shares issued in conversion | shares	516,421
Investors Related To Board Member And Officers | Convertible Notes | Series A Convertible Preferred Stock.
Related Party Transactions
Amount of shares issued in conversion | shares	63,967
Investors Related To Board Member And Officers | Debt Issued To Related Parties | Convertible Notes
Related Party Transactions
Proceeds from issuance of convertible notes | $		$ 300
Number of notes issued to related party	4	4
Number of board members who were issued debt	1	1
Number of officers		3
Investors Related To Board Member And Officers | Debt Issued To Related Parties | Convertible Notes | Series A Convertible Preferred Stock.
Related Party Transactions
Number of board members who were issued debt	1	1
Number of officers	3
Two Officers | Convertible Notes | Series A Convertible Preferred Stock.
Related Party Transactions
Amount of shares issued in conversion | shares	68,649
Two Officers | Debt Issued To Related Parties | Convertible Notes | Series A Convertible Preferred Stock.
Related Party Transactions
Number of officers	2

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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