Note 2 - Sale of Subsidiary; Discontinued Operations (Details) - Discontinued Operations, Major Components of Assets and Liabilities (ChemFree [Member], Discontinued Operations, Disposed of by Sale [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Major classes of assets included as part of discontinued operations:
Accounts receivable		$ 1,276
Inventories		1,042
Property, plant & equipment		488
Other assets		206
Total assets of discontinued operations		3,012
Major classes of liabilities included as part of discontinued operations:
Accounts payable	88	190
Other current liabilities	712	284
Other liabilities		212
Total liabilities of discontinued operations	800	838
Accrued Payroll [Member]
Major classes of liabilities included as part of discontinued operations:
Accrued payroll		$ 152