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Fair Value (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value [Abstract]

Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table represents the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2017:







		Quoted Prices
		in Active			Significant			Significant
		Markets for			Other			Other
		Identical			Observable			Unobservable
		Assets			Inputs			Inputs
		(Level 1)			(Level 2)			(Level 3)			Total
Assets:
Money market funds		$	—		$	12,774		$	—		$	12,774
Commercial paper			—			7,472			—			7,472
U.S. government agencies and securities			2,999			—			—			2,999
Corporate bonds			—			2,920			—			2,920
Total assets		$	2,999		$	23,166		$	—		$	26,165
Liabilities:
Acquisition-related contingent consideration		$	—		$	—		$	37,098		$	37,098
Total liabilities		$	—		$	—		$	37,098		$	37,098



The following table represents the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2016:







		Quoted Prices
		in Active			Significant			Significant
		Markets for			Other			Other
		Identical			Observable			Unobservable
		Assets			Inputs			Inputs
		(Level 1)			(Level 2)			(Level 3)			Total
Assets:
Money market funds		$	—		$	17,085		$	—		$	17,085
Commercial paper			—			5,996			—			5,996
U.S. government agencies and securities			7,000			1,529			—			8,529
Corporate bonds			—			8,276			—			8,276
Total assets		$	7,000		$	32,886		$	—		$	39,886
Liabilities:
Acquisition-related contingent consideration		$	—		$	—		$	41,176		$	41,176
Total liabilities		$	—		$	—		$	41,176		$	41,176



Level 3 Fair Value Measurements Using Significant Other Unobservable Inputs for Derivative Instruments



		2017			2016			2015
Beginning Balance		$	—		$	—		$	120
Total loss included in earnings			—			—			57
Exercises			—			—			(177)
Ending Balance		$	—		$	—		$	—



Level 3 Fair Value Measurements Using Significant Other Unobservable Inputs for Acquisition-Related Contingent Consideration



		2017			2016			2015
Beginning Balance		$	41,176		$	40,207		$	—
Amounts acquired			—			—			40,207
Changes in fair value included in earnings			(4,078)			969			—
Ending Balance		$	37,098		$	41,176		$	40,207



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Tabular disclosure of liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258

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