XML 25 R15.htm IDEA: XBRL DOCUMENT v3.7.0.1

Note 4 - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2017

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

						Fair Value Measurements at Reporting Date Using
						Quoted Prices in				Significant
						Active Markets				Other				Significant
		Balance at				for Identical				Observable				Unobservable
		March 31,				Assets				Inputs				Inputs
		201 7				(Level 1)				(Level 2)				(Level 3)
Cash and money market funds		$	43,092			$	43,092			$	—			$	—
United States government and agency			24,971				14,982				9,989				—
United States corporate debt securities			35,023				—				35,023				—
Foreign corporate debt securities			8,300				—				8,300				—
United States commercial paper			36,897				—				36,897				—
Foreign commercial paper			16,933				—				16,933				—
Total		$	165,216			$	58,074			$	107,142			$	—

						Fair Value Measurements at Reporting Date Using
						Quoted Prices in				Significant
						Active Markets				Other				Significant
		Balance at				for Identical				Observable				Unobservable
		December 31,				Assets				Inputs				Inputs
		201 6				(Level 1)				(Level 2)				(Level 3)
Cash and money market funds		$	13,414			$	13,414			$	—			$	—
United States corporate debt securities			12,039				—				12,039				—
Foreign corporate debt securities			14,057				—				14,057				—
United States commercial paper			8,635				—				8,635				—
Foreign commercial paper			2,993				—				2,993				—
Total		$	51,138			$	13,414			$	37,724			$	—

X

- Definition

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

+ Details

Name:	us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_TableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration