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Note 15 - Stockholders' Equity (Details) (USD $)	3 Months Ended	0 Months Ended		3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended
	Sep. 30, 2014	Jun. 25, 2014 IPO [Member] Underwriter [Member]	Jun. 25, 2014 IPO [Member]	Sep. 30, 2014 IPO [Member]	Jun. 25, 2014 IPO [Member]	Sep. 30, 2014 Employee Stock Option [Member] The 2005 Plan [Member]	Sep. 30, 2014 Employee Stock Option [Member]	Sep. 30, 2013 Employee Stock Option [Member]	Sep. 30, 2014 Employee Stock Option [Member]	Sep. 30, 2013 Employee Stock Option [Member]	Sep. 30, 2014 Deferred Stock Units (DSUs) [Member] Directors and Employees [Member]	Sep. 30, 2014 Deferred Stock Units (DSUs) [Member]	Sep. 30, 2013 Deferred Stock Units (DSUs) [Member]	Sep. 30, 2014 Deferred Stock Units (DSUs) [Member]	Sep. 30, 2013 Deferred Stock Units (DSUs) [Member]
Note 15 - Stockholders' Equity (Details) [Line Items]
Stock Issued During Period, Shares, New Issues (in Shares)		1,200,000	5,840,000
Share Price (in Dollars per share)					$ 7.00
Proceeds from Issuance Initial Public Offering	$ 40,900,000
Payments of Stock Issuance Costs				6,200,000
Proceeds from Issuance Initial Public Offering, Net of Issuance Costs	34,700,000
Allocated Share-based Compensation Expense							2,000,000	2,200,000	5,100,000	4,500,000		500,000	200,000	1,200,000	400,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options						13,800,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition						2 years 6 months								3 years 146 days
Share-based Compensation Arrangement by Share-based Payment Award, Deferred Stock Units, Number of Shares of Common Stock Per Award (in Shares)	1
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period											5 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options												$ 5,800,000		$ 5,800,000

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The cash outflow for cost incurred directly with the issuance of an equity security.

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