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SHARE BASED COMPENSATION (Details) - USD ($) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 30, 2017 | Aug. 08, 2016 | Jun. 22, 2016 | Apr. 30, 2017 | Apr. 30, 2016 | Apr. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation expense |  |  |  | $ 6,000 | $ 2,256,000 | $ 2,215,000
2017 LTIP Awards [Member] | Restricted Stock [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Restricted shares vesting percentage |  |  | 33.00% |  |  |
Restricted share awards, shares [Roll Forward] |  |  |  |  |  |
Granted (in shares) |  | 43,549 | 45,651 |  |  |
2017 LTIP Awards [Member] | Restricted Stock [Member] | Vesting Periods One [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Restricted shares vesting (in shares) | 56,203 | 12,874 |  | 56,203 |  |
Restricted shares vesting percentage | 33.00% | 33.00% |  |  |  |
2017 LTIP Awards [Member] | Restricted Stock [Member] | Vesting Periods Two [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Restricted shares vesting (in shares) | 49,342 | 30,675 |  | 49,342 |  |
Restricted shares vesting percentage | 33.00% | 33.00% |  |  |  |
2017 LTIP Awards [Member] | Performance Shares [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Performance period (in years) |  |  | 3 years |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] |  |  |  |  |  |
Volatility rate (in hundredths) |  | 24.00% | 23.80% |  |  |
Risk-free interest rate (in hundredths) |  | 0.83% | 0.86% |  |  |
Expected life |  | 2 years 8 months 19 days | 2 years 10 months 6 days |  |  |
Share price (in dollars per share) |  | $ 6.57 | $ 6.24 |  |  |
Restricted share awards, shares [Roll Forward] |  |  |  |  |  |
Granted (in shares) |  | 77,243 | 273,901 |  |  |
2015 Incentive Plan [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares (in shares) | 4,250,000 |  |  | 4,250,000 |  |
Term of award |  |  |  | 10 years |  |
Restricted share awards, shares [Roll Forward] |  |  |  |  |  |
Forfeited (in shares) |  |  |  | (274,000) |  |
2015 Incentive Plan [Member] | Performance Shares [Member] |  |  |  |  |  |
Restricted share awards, shares [Roll Forward] |  |  |  |  |  |
Granted (in shares) |  |  |  | 604,000 |  |
2008 Incentive Award Plan [Member] | Performance Shares [Member] |  |  |  |  |  |
Restricted share awards, shares [Roll Forward] |  |  |  |  |  |
Granted (in shares) |  |  |  | 59,000 | 220,000 |
Trustee Awards [Member] | Unrestricted Stock [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation expense |  |  |  | $ 365,000 | $ 352,000 | $ 274,000
Long Term Incentive Plan [Member] | 2017 LTIP Awards [Member] |  |  |  |  |  |
Share based awards with market conditions, grant date fair value [Abstract] |  |  |  |  |  |
Grant date fair value |  |  |  | 1,000,000 |  |
Share based awards with market conditions, unamortized value [Abstract] |  |  |  |  |  |
Unamortized value | $ 300,000 |  |  | 300,000 |  |
Restricted Share Awards [Member] | Restricted Stock [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total compensation cost related to non-vested share awards | $ 485,000 |  |  | $ 485,000 |  |
Weighted average period to recognize cost |  |  |  | 1 year 8 months 12 days |  |
Restricted share awards, shares [Roll Forward] |  |  |  |  |  |
Unvested, beginning of period (in shares) |  |  |  |  | 107,536 | 104,855
Granted (in shares) |  |  |  | 253,263 |  | 107,536
Vested during year (in shares) |  |  |  | (21,308) | (107,536) | (79,181)
Forfeited (in shares) |  |  |  | (36,817) |  | (25,674)
Unvested, end of period (in shares) | 195,138 |  |  | 195,138 |  | 107,536
Weighted avg grant-date fair value [Abstract] |  |  |  |  |  |
Unvested, beginning of period (in dollars per share) |  |  |  |  | $ 7.17 | $ 8.72
Granted (in dollars per share) |  |  |  | $ 6.16 | $ 7.17 | 7.17
Vested during period (in dollars per share) |  |  |  | 5.95 |  | 8.72
Forfeited (in dollars per share) |  |  |  | 6.24 |  | 8.72
Unvested, end of period (in dollars per share) | $ 6.17 |  |  | $ 6.17 |  | $ 7.17
Awards vested during period (in shares) |  |  |  | $ 127,000 | $ 647,000 | $ 568,000

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- Definition Aggregate grant date fair value of equity-based compensation awards granted during period. Excludes stock and unit options. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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