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Significant accounting policies Correction of immaterial errors (Tables) | 12 Months Ended
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Jan. 31, 2013
Correction of immaterial errors [Table Text Block] | A reconciliation of the effects of the adjustments to the previously reported balance sheet at January 31, 2012 follows:
| As Reported | Adjustment | As Adjusted
Inventories, net |  | $39,968 |  |  | $236 |  |  | $40,204 |
Total current assets | 82,434 |  | 236 |  | 82,670 |
Total assets | 157,047 |  | 236 |  | 157,283 |
Retained earnings | 22,802 |  | 236 |  | 23,038 |
Total stockholders' equity | 72,119 |  | 236 |  | 72,355 |
Total liabilities and stockholders' equity | 157,047 |  | 236 |  | 157,283 |
A reconciliation of the effects of the adjustments to the previously reported statement of operations for the year ending January 31, 2012 follows:
| As Reported | Adjustment | As Adjusted
Cost of sales |  | $197,203 |  |  | ($28 | ) |  | $197,175 |
Gross profit | 36,293 |  | 28 |  | 36,321 |
Loss from operations | (5,091 | ) | 28 |  | (5,063 | )
Loss before income taxes | (4,970 | ) | 28 |  | (4,942 | )
Net loss | (4,987 | ) | 28 |  | (4,959 | )
A reconciliation of the effects of the adjustments to the previously reported statement of cash flows for the year ending January 31, 2012 follows:
| As Reported | Adjustment | As Adjusted
Net loss |  | ($4,987 | ) |  | $28 |  |  | ($4,959 | )
Inventories | (4,655 | ) | (28 | ) | (4,683 | )
A reconciliation of the effects of the adjustments to the previously reported statement of stockholders' equity for the year ending January 31, 2012 follows:
| As Reported | Adjustment | As Adjusted
Net loss |  | ($4,987 | ) |  | $28 |  |  | ($4,959 | )
Retained earnings | 22,802 |  | 236 |  | 23,038 |
Total comprehensive loss | (6,760 | ) | 28 |  | (6,732 | )

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- Definition Tabular disclosure of prior period adjustments to previously issued financial statements including (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustments (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 154 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 9 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22644-107794 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22663-107794 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22658-107794 + Details
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