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Schedule II | 12 Months Ended
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Jan. 31, 2018
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, 2018 and 2017
(In thousands) | 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, 2018 |  |  |  |  |
Allowance for possible losses in collection of trade receivables | $305 | $247 | $135 | $52 | $469
Year Ended January 31, 2017 |  |  |  |  |
Allowance for possible losses in collection of trade receivables | $33 | $246 | $1 | $27 | $305
(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 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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- References No definition available. + Details
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