Consolidated Statements of Operations and Retained Earnings - USD ($) shares in Thousands, $ in Thousands		3 Months Ended			9 Months Ended
		Jan. 31, 2018	Jan. 31, 2017		Jan. 31, 2018	Jan. 31, 2017
REVENUES:
Fulfillment services		$ 7,676	$ 8,222		$ 22,592	$ 23,908
Real estate land sales		2,510	1,461		6,603	7,710
Other		193	94		1,685	1,832
Revenues	[1]	10,379	9,777		30,880	33,450
COSTS AND EXPENSES:
Real estate land sales		2,109	848		4,471	6,370
Operating and selling expenses:
Fulfillment services		6,338	6,855		18,415	20,235
Real estate		470	370		1,563	1,188
General and administrative expenses:
Fulfillment services		313	345		970	1,025
Real estate		156	130		356	433
Corporate		690	787		2,194	2,364
Impairment of real estate assets		0	150	[1]	0	150	[1]
Interest expense		18	22		49	328
Costs and Expenses, Total		10,094	9,507		28,018	32,093
Income before income taxes		285	270		2,862	1,357
Provision for income taxes (Note 9)	[1]	3,136	96		3,987	441
Net income (loss)		(2,851)	174		(1,125)	916
Retained earnings, beginning of period		48,490	47,521		46,764	46,779
Retained earnings, end of period		$ 45,639	$ 47,695		$ 45,639	$ 47,695
Earnings (loss) per share, net - basic and diluted (in dollars per share)		$ (0.35)	$ 0.02		$ (0.14)	$ 0.11
Weighted average number of common shares outstanding - basic (in shares)		8,075	8,053		8,070	8,048
Weighted average number of common shares outstanding - diluted (in shares)		8,075	8,080		8,070	8,074

[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.