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2.TRADE RECEIVABLES	6 Months Ended
	Jun. 30, 2011
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	2.  TRADE RECEIVABLES Trade receivables are presented net of the related allowance for uncollectible accounts of approximately $618,000, $868,000 and $951,000 at June 30, 2011, December 31, 2010 and June 30, 2010, respectively.  The allowance for uncollectible accounts is calculated based on the relative age and size of trade receivable balances.

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- Definition

Includes disclosure of claims held for amounts due a company. Examples include trade accounts receivables, notes receivables, loans receivables.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph k
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 3, 4
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 7
-Article 9

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 01-6
-Paragraph 13
-Subparagraph d

+ Details

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Namespace Prefix:	us-gaap
Data Type:	us-types:textBlockItemType
Balance Type:	na
Period Type:	duration