Note 2 - Sale of Subsidiary; Discontinued Operations (Details) (USD $)	3 Months Ended
Mar. 31, 2015
Note 2 - Sale of Subsidiary; Discontinued Operations (Details) [Line Items]
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	$ 18,746,000
Restricted Cash and Cash Equivalents, Current	900,000
Restricted Cash and Cash Equivalents, Noncurrent	2,200,000
Restricted Cash and Cash Equivalents Before Working Capital Adjustment [Member] \| ChemFree [Member] \| Discontinued Operations, Disposed of by Sale [Member]
Note 2 - Sale of Subsidiary; Discontinued Operations (Details) [Line Items]
Restricted Cash and Cash Equivalents, Current	1,100,000
ChemFree [Member] \| Discontinued Operations, Disposed of by Sale [Member]
Note 2 - Sale of Subsidiary; Discontinued Operations (Details) [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	21,600,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	18,746,000
Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities	181,000
Increase in Restricted Cash	3,300,000
Disposal Group, Including Discontinued Operation, Working Capital Adjustment	200,000
Restricted Cash and Cash Equivalents, Current	900,000
Restricted Cash and Cash Equivalents, Noncurrent	$ 2,200,000

Amount of working capital adjustment for the disposal of assets and liabilities, including discontinued operation.

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Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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Amount classified as deferred tax liabilities attributable to disposal group held for sale or disposed of.

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Amount of cash outflow associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.

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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements.

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