Summary of Significant Accounting Policies - Estimates and Recapitalization (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Impairment of Long-Lived Assets
Impairment loss	$ 0
Income Taxes
Liability for uncertain tax positions	$ 0	$ 0
Computers and software
Property and Equipment
Useful life	3 years
Laboratory equipment office equipment and furniture
Property and Equipment
Useful life	5 years
Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets
Balance of deposit for supplies	$ 1,000

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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Amount of consideration paid in advance for supplies that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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