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Note 2 - Acquisition (Details) (USD $)	0 Months Ended	1 Months Ended	6 Months Ended
Note 2 - Acquisition (Details) (USD $)	Sep. 04, 2014	Jun. 20, 2014	Dec. 31, 2014	Jun. 30, 2014
Note 2 - Acquisition (Details) [Line Items]
Goodwill			$ 154,764,000us-gaap_Goodwill	$ 125,965,000us-gaap_Goodwill
Trademarks [Member] \| MPE Aeroengines Inc. [Member]
Note 2 - Acquisition (Details) [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	1,500,000
Trademarks [Member] \| Ultrafryer Systems, Inc. [Member]
Note 2 - Acquisition (Details) [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets		2,400,000
Customer Relationships [Member] \| MPE Aeroengines Inc. [Member]
Note 2 - Acquisition (Details) [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	9,100,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years
Customer Relationships [Member] \| Ultrafryer Systems, Inc. [Member]
Note 2 - Acquisition (Details) [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		4,900,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years
Other Intangible Assets [Member] \| Ultrafryer Systems, Inc. [Member] \| Minimum [Member]
Note 2 - Acquisition (Details) [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years
Other Intangible Assets [Member] \| Ultrafryer Systems, Inc. [Member] \| Maximum [Member]
Note 2 - Acquisition (Details) [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		5 years
Other Intangible Assets [Member] \| Ultrafryer Systems, Inc. [Member]
Note 2 - Acquisition (Details) [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		300,000
MPE Aeroengines Inc. [Member]
Note 2 - Acquisition (Details) [Line Items]
Payments to Acquire Businesses, Gross	55,000,000
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	10,600,000
Goodwill	32,800,000
Ultrafryer Systems, Inc. [Member]
Note 2 - Acquisition (Details) [Line Items]
Payments to Acquire Businesses, Gross		23,000,000	22,986,000
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		7,600,000	7,612,000
Goodwill		$ 11,000,000	$ 11,021,000