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Note 4 - Balance Sheet Details (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Text Block Supplement [Abstract]

Property, Plant and Equipment [Table Text Block]

		December 31,
		2014				2013
Scientific equipment		$	4,793			$	4,371
Computer equipment and software			1,133				1,080
Furniture, fixtures and office equipment			351				344
Leasehold improvements			1,376				1,360
			7,653				7,155
Less: accumulated depreciation and amortization			(4,833	)			(4,273	)
		$	2,820			$	2,882

Schedule of Accrued Liabilities [Table Text Block]

		December 31,
		2014				2013
Accrued employee salaries and benefits		$	719			$	796
Accrued bonuses			2,012				1,770
Total accrued payroll and employee liabilities		$	2,731			$	2,566

		December 31,
		2014				2013
Accrued professional fees		$	1,775			$	69
Accrued accounts payable			886				26
Deferred rent			105				131
Other accrued liabilities			165				138
Total other accrued expense		$	2,931			$	364

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- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 13

-Subparagraph b

-Article 5

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Tabular disclosure of the components of accrued liabilities.

+ References

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