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Valuation and Qualifying Accounts | 12 Months Ended
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Jan. 31, 2013
Valuation and Qualifying Accounts [Abstract] |
Valuation and Qualifying Accounts | 12. Valuation and Qualifying Accounts
|  | 2013 |  |  | 2012 |
Allowance for doubtful accounts: |  |  |  |  |  |
Balance - beginning of year |  | $ | 42,576 |  |  | $ | 34,746 |
Charged to operations |  |  | 74,393 |  |  |  | 118,077 |
Write-off of accounts receivable |  |  | (38,147 | ) |  |  | (110,247 | )
Balance - end of year |  | $ | 78,822 |  |  | $ | 42,576 |

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- 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
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