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PURCHASE OF ATLANTIC PROJECTS COMPANY LIMITED - fair value of assets and liabilities acquired (Details 3) - USD ($) |  | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
May. 29, 2014 | Oct. 31, 2015 | May. 29, 2015 | Jan. 31, 2015 | Oct. 31, 2014
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |
Goodwill |  | $ 22,525,000 |  | $ 18,476,000 | $ 18,476,000
Customer Relationships [Member] |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |
Useful life |  | 5 years |  |  |
Atlantic Projects Company Limited [Member] |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |
Cash |  |  | $ 2,274,000 |  |
Accounts receivable |  |  | 5,735,000 |  |
Costs and estimated earnings in excess of billings |  |  | 3,177,000 |  |
Prepaid expenses and other assets |  |  | 592,000 |  |
Property, plant and equipment |  |  | 1,303,000 |  |
Intangible assets (defined lives) |  |  | 543,000 |  |
Goodwill |  |  | 4,051,000 |  |
Less - accounts payable and accrued expenses (including cash dividends payable) |  |  | 5,830,000 |  |
Less - deferred taxes and other liabilities |  |  | 744,000 |  |
Net assets acquired |  |  | $ 11,101,000 |  |
Atlantic Projects Company Limited [Member] | Customer Contracts [Member] | Maximum [Member] |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |
Useful life | 1 year |  |  |  |
Atlantic Projects Company Limited [Member] | Customer Relationships [Member] |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |
Useful life | 5 years |  |  |  |

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