Note 14 - Stockholders' Equity (Details Textual) shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2019 USD ($) shares
Payments of Dividends, Total	$ 0
New Share Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount	$ 6,000
Stock Repurchased During Period, Shares \| shares	0

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration