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Note 14 - Goodwill	9 Months Ended
	Sep. 30, 2016
Notes to Financial Statements
Goodwill Disclosure [Text Block]	14. Goodwill Goodwill represents the excess of the purchase price over the assigned fair values of the assets and liabilities assumed in conjunction with an acquisition, and is reviewed for impairment annually at December 31 or whenever events occur or circumstances change that indicate goodwill may be impaired. Due to Water Transmission market conditions in 2015, goodwill of $5.3 million related to the Company’s Water Transmission Group was quantitatively evaluated using a weighted average of income and market approaches. The income approach is primarily driven by inputs from the Company’s internal financial forecasts. The market approach incorporates inputs from market participant data, as well as inputs derived from Company assumptions. The Company determined that its Water Transmission Group goodwill was impaired at June 30, 2015, and it was completely written off in the second quarter of 2015.

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The entire disclosure for goodwill.

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