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Schedule II | 12 Months Ended
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Jan. 31, 2017
Valuation and Qualifying Accounts [Abstract] |
Schedule II of Valuation and Qualifying Accounts Disclosure [Text Block] | Schedule II Perma-Pipe International Holdings, Inc. and Subsidiaries VALUATION AND QUALIFYING ACCOUNTS For the Years Ended January 31, 2017 and 2016
| Balance at beginning of period | Charged to costs and expenses | Deductions from reserves (1) | Charged to other accounts (2) | Balance at end of period
Year Ended January 31, 2017 |  |  |  |  |
Allowance for possible losses in collection of trade receivables | $33 | $246 | $1 | $27 | $305
Year Ended January 31, 2016 |  |  |  |  |
Allowance for possible losses in collection of trade receivables | $31 | $6 | $4 | $0 | $33
(1) Uncollectible accounts charged off (2) Primarily related to recoveries from accounts previously charged off and currency translation

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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 FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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