XML 29 R19.htm IDEA: XBRL DOCUMENT v3.7.0.1

Fair value measurements (Tables)

3 Months Ended

Mar. 31, 2017

Fair Value Disclosures [Abstract]

Summary of Cash Equivalents and Marketable Securities Measured at Fair Value on a Recurring Basis

The following tables summarize the cash equivalents and marketable securities measured at fair value on a recurring basis as of March 31, 2017 and December 31, 2016:

	Level 1				Level 2				Level 3				Balance as of March 31, 2017
Cash equivalents	$	11,115,898			$	—			$	—			$	11,115,898
Marketable securities:
Corporate debt securities	—				3,102,128				—				3,102,128
Commercial paper	—				4,594,668				—				4,594,668
U.S. government agency securities	—				24,046,290				—				24,046,290
	$	11,115,898			$	31,743,086			$	—			$	42,858,984

	Level 1				Level 2				Level 3				Balance as of December 31, 2016
Cash equivalents	$	11,681,074			$	—			$	—			$	11,681,074
Marketable securities:
Corporate debt securities	—				1,518,240				—				1,518,240
Commercial paper	—				6,081,202				—				6,081,202
U.S. government agency securities	—				31,059,491				—				31,059,491
	$	11,681,074			$	38,658,933			$	—			$	50,340,007

X

- Definition

Tabular disclosure of assets, 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).

+ References

Reference 1: 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 2: 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 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

+ Details

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

X

- References

No definition available.

+ Details

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