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Note 2 - Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Notes Tables

Schedule of Share-based Compensation, Activity [Table Text Block]

		Awards Available				Options Outstanding				Weighted Average Exercise Price
Balance December 31, 2014			2,362				9,605			$	6.21
Restricted stock unit awards granted			(153	)			—				—
Restricted stock unit awards cancelled			1				—				—
Stock option awards granted			(1,135	)			1,135				11.98
Stock option awards exercised			—				(933	)			4.26
Stock option awards cancelled			28				(28	)			9.05
Balance June 30, 2015			1,103				9,779			$	7.06

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		2015				2014
Expected Life in Years			5.6				5.5
Expected Volatility			83	%			87	%
Expected Dividend Yield			0.0	%			0.0	%
Risk-Free Interest Rate			1.5	%			1.6	%

X

- Definition

Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value.

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (f)(2)



-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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