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Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Cash Equivalents and Available-for-sale Securities

Cash equivalents and available-for-sale securities consisted of the following (in thousands):

		December 31, 2016
		Amortized				Gross Unrealized
		Cost				Gains				Losses				Fair Value
Money market funds		$	11,270			$	—			$	—			$	11,270
Corporate bonds			21,886				—				(45	)			21,841
Commercial paper			10,769				—				—				10,769
Government bonds			41,316				2				(29	)			41,289
Total cash equivalents and available-for-sale securities		$	85,241			$	2			$	(74	)		$	85,169
Classified as:
Cash equivalents														$	18,504
Available-for-sale securities - current															56,515
Available-for-sale securities - noncurrent															10,150
Total cash equivalents and available-for-sale securities														$	85,169
		December 31, 2015
		Amortized				Gross Unrealized
		Cost				Gains				Losses				Fair Value
Money market funds		$	2,136			$	—			$	—			$	2,136
Corporate bonds			7,373				—				(5	)			7,368
Commercial paper			500				—				—				500
Total cash equivalents and available-for-sale securities		$	10,009			$	—			$	(5	)		$	10,004
Classified as:
Cash equivalents														$	2,136
Available-for-sale securities - current															7,868
Total cash equivalents and available-for-sale securities														$	10,004

Summary of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following (in thousands):

		December 31,
		2016				2015
Prepaid clinical and research related expenses		$	2,488			$	1,253
Other			906				305
Prepaid expenses and other current assets		$	3,394			$	1,558

Summary of Property and Equipment Net

Property and equipment, net consisted of the following (in thousands):

		December 31,
		2016				2015
Laboratory equipment		$	1,650			$	1,452
Furniture and computer equipment			163				140
Leasehold improvements			62				48
Total property and equipment			1,875				1,640
Less: accumulated depreciation and amortization			(1,313	)			(1,031	)
Property and equipment, net		$	562			$	609

Summary of Accrued Expenses and Other Payables

Accrued expenses and other payables consisted of the following (in thousands):

		December 31,
		2016				2015
Accrued clinical and research related expenses		$	3,617			$	976
Accrued employee related expenses			1,420				754
Other			235				149
Total accrued expenses and other payables		$	5,272			$	1,879

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- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: 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(13))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Tabular disclosure of the (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses.

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Tabular disclosure of the components of cash, cash equivalents, and investments.

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Tabular disclosure of the carrying amounts of other current assets.

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