Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2019	Jan. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 27,003	$ 30,117	$ 82,435	$ 83,340
Operating income (loss)	2,130	4,204	4,263	11,068
Capital expenditures	120	201	1,014	413
Capitalized software	2,073	1,035	4,162	3,652
Depreciation and amortization	1,960	1,599	5,671	4,305
Earnings (loss) before income taxes	2,657	5,778	5,353	13,917
Supply Chain Management
Segment Reporting Information [Line Items]
Operating income (loss)	4,981	5,969	12,021	15,551
Capital expenditures	21	79	145	160
Capitalized software	2,073	1,035	4,162	3,652
Depreciation and amortization	1,862	1,551	5,416	4,157
Earnings (loss) before income taxes	5,190	6,099	12,248	15,892
IT Consulting
Segment Reporting Information [Line Items]
Operating income (loss)	244	185	999	775
Capital expenditures	0	2	1	8
Capitalized software	0	0	0	0
Depreciation and amortization	2	2	6	6
Earnings (loss) before income taxes	244	185	999	775
Other
Segment Reporting Information [Line Items]
Operating income (loss)	(3,095)	(1,950)	(8,757)	(5,258)
Capital expenditures	99	120	868	245
Capitalized software	0	0	0	0
Depreciation and amortization	96	46	249	142
Earnings (loss) before income taxes	(2,777)	(506)	(7,894)	(2,750)
Operating Segments
Segment Reporting Information [Line Items]
Revenues	27,003	30,117	82,435	83,340
Operating income (loss)	2,130	4,204	4,263	11,068
Operating Segments \| Supply Chain Management
Segment Reporting Information [Line Items]
Revenues	21,494	24,902	65,066	67,965
Operating income (loss)	4,981	5,969	12,021	15,551
Operating Segments \| IT Consulting
Segment Reporting Information [Line Items]
Revenues	4,938	4,557	15,517	13,522
Operating income (loss)	244	185	999	775
Operating Segments \| Other
Segment Reporting Information [Line Items]
Revenues	571	658	1,852	1,853
Operating income (loss)	(3,095)	(1,950)	(8,757)	(5,258)
Intersegment Eliminations
Segment Reporting Information [Line Items]
Operating income (loss)	0	0	0	0
Intersegment Eliminations \| Supply Chain Management
Segment Reporting Information [Line Items]
Operating income (loss)	0	0	0	0
Intersegment Eliminations \| IT Consulting
Segment Reporting Information [Line Items]
Operating income (loss)	0	0	0	0
Intersegment Eliminations \| Other
Segment Reporting Information [Line Items]
Operating income (loss)	$ 0	$ 0	$ 0	$ 0

Additions made to capitalized computer software costs during the period.

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