Note 6 - Stockholders' Equity and Equity Compensation (Detail) - Binomial Option-Pricing Model Assumptions (USD $)	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Weighted average grant-date fair value (in Dollars per share)	$ 8.19	$ 11.61
Weighted average grant-date fair value (in Dollars per share)	$ 8.19	$ 11.61
Volatility	45.10%	50.40%
Expected term (years)	7 years	7 years
Dividend yield	0.00%	0.00%
Risk-free rate	1.50%	2.80%
Minimum [Member]
Weighted average grant-date fair value (in Dollars per share)	$ 8.14
Weighted average grant-date fair value (in Dollars per share)	$ 8.14
Volatility	43.00%	47.00%
Risk-free rate	1.00%	2.30%
Maximum [Member]
Weighted average grant-date fair value (in Dollars per share)	$ 8.19
Weighted average grant-date fair value (in Dollars per share)	$ 8.19
Volatility	45.20%	50.60%
Risk-free rate	1.50%	3.00%

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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)(iii)

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

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

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The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

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The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

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The range of expected volatilities used and the weighted-average expected volatility for an entity using a valuation technique with different volatilities during the contractual term.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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