XML 23 R30.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
--- | ---
Dec. 31, 2011
Schedule II - Valuation and Qualifying Accounts |
Schedule II - Valuation and Qualifying Accounts |
Years ended December 31, 2011, 2010, and 2009 Accounts receivable, allowance for doubtful accounts:
|  | 2011 |  | 2010 |  | 2009 |
Balance at beginning of year |  | $ | 342,682 |  | $ | 473,912 |  | $ | 387,037 |
Provision (Recoveries) credited to expense |  | 55,209 |  | 8,466 |  | 155,069 |
(Write-offs) and recoveries |  | (19,032 | ) | (139,696 | ) | (68,194 | )
Balance at end of year |  | $ | 378,859 |  | $ | 342,682 |  | $ | 473,912

X
- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
Name: | us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ValuationAndQualifyingAccountsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration