BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)
$ in Millions |
3 Months Ended |
6 Months Ended |
12 Months Ended |
|
Jan. 31, 2017 |
Jan. 31, 2016 |
Jan. 31, 2017 |
Jan. 31, 2016 |
Jul. 31, 2016 |
Oct. 31, 2016 |
| New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2016-09 |
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| Concentration Risk [Line Items] |
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| Deferred tax assets, net |
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$ 0.1
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| New Accounting Pronouncement, Early Adoption, Effect | Retained Earnings | Accounting Standards Update 2016-09 |
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| Concentration Risk [Line Items] |
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| Cumulative effect of new accounting principle in period of adoption |
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$ 0.1
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| Partner Concentration Risk | Revenue | Partner A |
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| Concentration Risk [Line Items] |
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| Concentration risk percentage |
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13.00%
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12.00%
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16.00%
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| Partner Concentration Risk | Revenue | Partner B |
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| Concentration Risk [Line Items] |
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| Concentration risk percentage |
19.00%
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19.00%
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20.00%
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20.00%
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| Partner Concentration Risk | Revenue | Partner C |
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| Concentration Risk [Line Items] |
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| Concentration risk percentage |
16.00%
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13.00%
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15.00%
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12.00%
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| Partner Concentration Risk | Revenue | Partner E |
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| Concentration Risk [Line Items] |
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| Concentration risk percentage |
11.00%
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12.00%
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10.00%
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12.00%
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| Partner Concentration Risk | Revenue | Partner F |
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| Concentration Risk [Line Items] |
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| Concentration risk percentage |
13.00%
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19.00%
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12.00%
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18.00%
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| Partner Concentration Risk | Accounts Receivable | Partner B |
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| Concentration Risk [Line Items] |
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| Concentration risk percentage |
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15.00%
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17.00%
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| Partner Concentration Risk | Accounts Receivable | Partner C |
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| Concentration Risk [Line Items] |
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| Concentration risk percentage |
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12.00%
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| Partner Concentration Risk | Accounts Receivable | Partner D |
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| Concentration Risk [Line Items] |
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| Concentration risk percentage |
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16.00%
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23.00%
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| Partner Concentration Risk | Accounts Receivable | Partner E |
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| Concentration Risk [Line Items] |
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| Concentration risk percentage |
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13.00%
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11.00%
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