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Note 8 - Segment Information (Detail) - Net sales for geographic areas were as follows: (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Geographic locations	$ 17,000,728	$ 15,385,421	$ 52,082,061	$ 47,198,382
United States [Member] | Three Months [Member]
Geographic locations			14,221,642	13,078,107
United States [Member] | Nine Months [Member]
Geographic locations			43,861,288	40,056,351
Canada [Member] | Three Months [Member]
Geographic locations			1,761,960	1,560,808
Canada [Member] | Nine Months [Member]
Geographic locations			5,214,782	4,832,078
All Other Countries [Member] | Three Months [Member]
Geographic locations			1,017,126	746,506
All Other Countries [Member] | Nine Months [Member]
Geographic locations			3,005,991	2,309,953
Total [Member] | Three Months [Member]
Geographic locations			17,000,728	15,385,421
Total [Member] | Nine Months [Member]
Geographic locations			$ 52,082,061	$ 47,198,382

X

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration