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COMMITMENTS - General Information (Details) |  |  | 12 Months Ended
--- | --- | --- | ---
Apr. 01, 2016 USD ($) | Mar. 31, 2016 USD ($) | Jan. 31, 2016 USD ($) item | Jan. 31, 2015 USD ($) | Jan. 31, 2014 USD ($)
Commitments |  |  |  |  |
The number of option terms remaining | item |  |  | 1 |  |
The period of the option terms |  |  | 2 years |  |
Selling, General and Administrative Expenses |  |  |  |  |
Commitments |  |  |  |  |
Rent expense included in selling, general and administrative expenses of continuing operations |  |  | $ 331,000 | $ 195,000 | $ 171,000
Costs of Revenues |  |  |  |  |
Commitments |  |  |  |  |
Rent incurred on construction projects included in the costs of revenues |  |  | $ 15,004,000 | $ 14,413,000 | $ 3,612,000
Roberts |  |  |  |  |
Commitments |  |  |  |  |
Annual lease amount for primary offices and plant |  | $ 400,000 |  |  |
Amended annual lease amount for primary offices and plant | $ 300,000 |  |  |  |

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- Definition Represents the number of option terms remaining for operating leases. + References No definition available. + Details
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- Definition Amount of annual required minimum rental payments for operating lease for primary offices and plant. + References No definition available. + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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