Note 15 - Acquisition of Business (Details) - Summary of Assets and Liabilities Assumed (USD $)	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2013
Summary of Assets and Liabilities Assumed [Abstract]
Accounts receivable			$ 4,672,000
Prepaid expenses and other current assets			1,096,000
Inventories			10,374,000
Property, plant and equipment			4,284,000
Identifiable intangible assets			18,900,000
Goodwill	4,135,000us-gaap_Goodwill	4,135,000us-gaap_Goodwill	4,135,000us-gaap_Goodwill
Total assets			43,461,000
Other current liabilities			2,680,000
Future contingent liabilities	5,745,000	6,806,000	6,743,000
Total liabilities			$ 9,423,000

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Amount of liability recognized arising from contingent consideration in a business combination.

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Amount of assets acquired at the acquisition date.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of other liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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Amount of liabilities assumed at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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