FAIR VALUE MEASUREMENTS, Derivative Instruments (Details) - USD ($) |
3 Months Ended | ||
|---|---|---|---|
Apr. 30, 2016 |
Apr. 30, 2015 |
Jan. 31, 2016 |
|
| Derivatives, Fair Value [Line Items] | |||
| Fair value of derivative instrument | $ (706,000) | $ (675,000) | |
| Interest Rate Swap [Member] | |||
| Derivatives, Fair Value [Line Items] | |||
| Change in fair value recognized in net income (loss) | (31,000) | $ 245,000 | |
| Interest Rate Swap [Member] | Other Liabilities [Member] | |||
| Derivatives, Fair Value [Line Items] | |||
| Fair value of derivative instrument | $ (706,000) | $ (675,000) | |