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ACCOUNTS RECEIVABLE (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jul. 31, 2016 | Jul. 31, 2015 | Jul. 31, 2016 | Jul. 31, 2015 | Jan. 31, 2016
Accounts, Notes, Loans and Financing Receivable |  |  |  |  |
Contract payment amounts retained by project owners | $ 17,800 |  | $ 17,800 |  | $ 44,600
Accounts receivable, net | 32,706 |  | 32,706 |  | $ 64,185
Provision for trade accounts receivable loss | 0 | $ 0 | $ 0 | $ 0 |
APC |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |  |  |
Provision for trade accounts receivable loss | $ 800 |  |  |  |

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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3-4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a(1) -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 + Details
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