Note 14 - Stockholders' Equity (Details Textual) - New Share Repurchase Program [Member] shares in Thousands, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019 USD ($) shares	Sep. 30, 2019 USD ($) shares
Stock Repurchase Program, Authorized Amount \| $	$ 6	$ 6
Stock Repurchased During Period, Shares \| shares	0	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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration