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Note 9 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	May 09, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
D.A. Davidson and Co. [Member]
Share Price	$ 4
Share Price, Net	$ 3.77
Proceeds from Issuance of Common Stock	$ 19,100
Over-Allotment Option, Period of Option	30 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		20,000		79,240
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value				$ 4.36
Proceeds from Issuance of Common Stock				$ 19,144
Allocated Share-based Compensation Expense		$ 400	$ 300	800	$ 500
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 2,700		$ 2,700
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition				1 year 255 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		800,000		800,000

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The period of an over-allotment option until it's expiration.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The cash inflow from the additional capital contribution to the entity.

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