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INFORMATION ABOUT THE COMPANY’S OPERATIONS IN DIFFERENT INDUSTRY SEGMENTS (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Oct. 31, 2017
Oct. 31, 2016
Oct. 31, 2017
Oct. 31, 2016
Apr. 30, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]          
Revenues [1] $ 9,175 $ 11,465 $ 20,501 $ 23,673  
Net income (loss) from operations [1] 278 112 1,726 742  
Provision (benefit) for income taxes [1] 85 8 851 345  
Interest expense (income), net [1] 18 82 31 306  
Depreciation and amortization [1] 314 350 635 717  
EBITDA [1],[2] 695 552 3,243 2,110  
Capital expenditures [1] 19 10 29 49  
Total assets 107,022 [1] 111,816 [1] 107,022 [1] 111,816 [1] $ 106,676
Real Estate          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Revenues [1] 1,476 3,597 4,223 7,967  
Net income (loss) from operations [1] (577) (402) (397) (155)  
Provision (benefit) for income taxes [1] (338) (236) (204) (91)  
Interest expense (income), net [1] 524 574 1,048 1,221  
Depreciation and amortization [1] 17 20 35 44  
EBITDA [1],[2] (374) (44) 482 1,019  
Capital expenditures [1] 0 0 0 0  
Total assets [1] 74,233 77,638 74,233 77,638  
Fulfillment Services [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Revenues [1] 7,673 7,858 [3] 16,234 [3] 15,686 [3]  
Net income (loss) from operations [1] 560 (32) [3] 1,600 [3] (74) [3]  
Provision (benefit) for income taxes [1] 289 (13) [3] 825 [3] (38) [3]  
Interest expense (income), net [1] 293 268 [3] 596 [3] 537 [3]  
Depreciation and amortization [1] 297 330 [3] 600 [3] 673 [3]  
EBITDA [1],[2] 1,439 553 [3] 3,621 [3] 1,098 [3]  
Capital expenditures [1] 19 10 [3] 29 [3] 49 [3]  
Total assets [1],[3] 25,745 28,974 25,745 28,974  
Corporate and Other [Member]          
Segment Reporting, Revenue Reconciling Item [Line Items]          
Revenues [1] 26 10 44 20  
Net income (loss) from operations [1] 295 546 523 971  
Provision (benefit) for income taxes [1] 134 257 230 474  
Interest expense (income), net [1] (799) (760) (1,613) (1,452)  
Depreciation and amortization [1] 0 0 0 0  
EBITDA [1],[2] (370) 43 (860) (7)  
Capital expenditures [1] 0 0 0 0  
Total assets [1] $ 7,044 $ 5,204 $ 7,044 $ 5,204  
[1] Revenue information provided for each segment includes amounts grouped as Other in the accompanying consolidated statements of operations. Corporate and Other is net of intercompany eliminations.
[2] The Company uses EBITDA (which the Company defines as income (loss) before net interest expense, income taxes, depreciation and amortization, and non-cash impairment charges) in addition to net income (loss) as a key measure of profit or loss for segment performance and evaluation purposes.
[3] Fulfillment services revenues and EBITDA for the six months ending October 31, 2017 included a pre-tax gain of $1,318,000 resulting from the settlement agreement with the State of Florida (see Note 6).