XML 31 R16.htm IDEA: XBRL DOCUMENT v3.8.0.1

Note 3 - Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

Available-for-sale Securities [Table Text Block]

		March 31, 2018
						Gross				Gross
		Amortized				Unrealized				Unrealized				Estimated
		Cost				Gains				Losses				Fair Value
U.S. corporate debt securities		$	16,202			$	—			$	(42	)		$	16,160
U.S. commercial paper			17,402				—				—				17,402
Foreign commercial paper			33,801				—				—				33,801
Total		$	67,405			$	—			$	(42	)		$	67,363

		D ecember 31, 2017
						Gross				Gross
		Amortized				Unrealized				Unrealized				Estimated
		Cost				Gains				Losses				Fair Value
U.S. corporate debt securities		$	13,003			$	—			$	(10	)		$	12,993
U.S. commercial paper			4,929				—				—				4,929
Foreign commercial paper			9,874				—				—				9,874
Total		$	27,806			$	—			$	(10	)		$	27,796

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

		As of March 3 1 ,
		2018				2017
Stock options outstanding			12,906				11,849
Warrants outstanding			640				625
Shares of common stock underlying Convertible Notes outstanding			8,103				7,634

X

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References

No definition available.

+ Details

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

X

- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

Name:	us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock
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