RECEIVABLES (Details Textual) - USD ($)		3 Months Ended		9 Months Ended
		Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016	Apr. 30, 2016
Revenues, Total	[1]	$ 9,777,000	$ 12,198,000	$ 33,450,000	$ 32,994,000
Accounts Receivable, Net		7,190,000		7,190,000		$ 7,271,000
Customer Concentration Risk [Member]
Revenues, Total				$ 3,590,000	$ 4,084,000
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
Concentration Risk, Percentage				10.70%	12.40%
Fulfillment Services [Member]
Revenues, Total	[1]	8,222,000	$ 8,759,000	$ 23,908,000	$ 26,666,000
Accounts Receivable, Net		$ 745,000		$ 745,000

[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.