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Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2017

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):

	September 30, 2017
	Amortized Cost				Gross Unrealized
					Gains				Losses				Fair Value
Money market funds	$	47,638			$	—			$	—			$	47,638
Corporate bonds	7,502				—				(7		)		7,495
Government bonds	47,056				—				(44		)		47,012
Total cash equivalents and available-for-sale securities	$	102,196			$	—			$	(51	)		$	102,145
Classified as:
Cash equivalents													$	47,638
Available-for-sale securities - current													43,191
Available-for-sale securities - noncurrent													11,316
Total cash equivalents and available-for-sale securities													$	102,145

	December 31, 2016
	Amortized Cost				Gross Unrealized
					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

Summary of Accrued Expenses and Other Payables

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

	September 30, 2017				December 31, 2016
Accrued clinical and research related expenses	$	5,864			$	3,617
Accrued employee related expenses	1,611				1,420
Accrued professional service fees	709				115
Other	57				120
Total accrued expenses and other payables	$	8,241			$	5,272

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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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