Note 1 - Description of Business (Details)	3 Months Ended						12 Months Ended			24 Months Ended				3 Months Ended		12 Months Ended		12 Months Ended		3 Months Ended				3 Months Ended
	Sep. 30, 2013 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2013 EUR (€)	Jun. 30, 2012 USD ($)	Mar. 31, 2012 USD ($)	Sep. 30, 2011 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2015 GBP (£)	Jul. 02, 2013 USD ($)	Apr. 30, 2012 jointVenture	Jun. 30, 2013 Goodwill and Intagible Assets [Member] USD ($)	Jun. 30, 2013 Tangible Assets [Member] USD ($)	Dec. 31, 2013 Brinderson LP [Member] USD ($)	Jul. 02, 2013 Brinderson LP [Member] USD ($)	Dec. 31, 2013 Fyfe Asia [Member] USD ($)	Dec. 31, 2013 Fyfe LA [Member] USD ($)	Dec. 31, 2013 CRTS [Member] USD ($)	Dec. 31, 2012 CRTS [Member] USD ($)	Jun. 30, 2011 CRTS [Member] USD ($)	Dec. 31, 2013 USTS [Member]	Jun. 30, 2013 Bayou Coating [Member] USD ($)	Dec. 31, 2012 Bayou Coating [Member]	Dec. 31, 2013 Delta Double Jointing [Member]	Jul. 02, 2013 2013 Credit Facility [Member] USD ($)
General [Line Items]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net												$ 147,600,000					$ 147,600,000
Debt Instrument, Face Amount																											650,000,000
Goodwill and Intangible Asset Impairment		3,900,000
Goodwill and Intangible Asset Impairment, Net of Tax		2,400,000
Impairment Effect on Earnings Per Share, after Tax (in Dollars per share)														$ 0.06	$ 0.02
Tangible Asset Impairment Charges		1,100,000
Tangible Asset Impairment Charges, Net of Tax		700,000
Business Exit Costs							100,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High																						15,000,000
Business Combination, Contingent Consideration, Amounts Paid							2,112,000	0	0
Earnout reversal							(4,175,000)	(10,019,000)	(1,700,000)											3,900,000	8,200,000
Business Combination, Contingent Consideration, Liability																			0	700,000
Noncontrolling Interest, Ownership Percentage by Parent		50.00%	50.00%																				51.00%			59.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners																							49.00%			41.00%
PercentOfBookValue																									49.00%
Equity Method Investment, Other than Temporary Impairment																								2,700,000
EquityMethodInvestmentOtherThanTemporaryImpairmentNetOfTax																								1,800,000
Total consideration recorded		18,300,000	14,000,000													147,605,000		40,144,000
Gain (Loss) on Disposition of Business		11,300,000
Business Acquisition, Transaction Costs		500,000
Long-term Purchase Commitment, Amount (in Pounds)										3,600,000	2,300,000
NumberOfJointVentures													2
Payments to Acquire Businesses, Gross	150,000,000			40,700,000	2,300,000	115,800,000		40,100,000
Proceeds from line of credit				18,000,000			0	26,000,000	0
Payments for Previous Acquisition					$ 1,100,000			$ 600,000