Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2018
Segment Reporting Information [Line Items]
Total revenues	$ 29,273	$ 30,600	$ 28,210	$ 27,383	$ 26,271	$ 27,003	$ 28,033	$ 27,399	$ 115,466	$ 108,706	$ 112,703
Operating income	1,589	$ 2,819	$ 843	$ 797	1,013	$ 2,130	$ 1,526	$ 607	6,048	5,276	13,531
Capital expenditures									420	1,252	1,428
Capitalized Software									3,170	5,961	4,804
Depreciation and amortization									8,103	7,719	6,030
Interest income									1,524	2,092	1,575
Earnings (loss) before income taxes									6,798	7,641	15,715
Total Consolidated Assets	171,293				161,310				171,293	161,310
Supply Chain Management
Segment Reporting Information [Line Items]
Total revenues									95,018	86,296	91,613
Capital expenditures									156	375	263
Capitalized Software									3,170	5,961	4,804
Depreciation and amortization									7,727	7,372	5,827
Interest income									829	1,408	1,043
Earnings (loss) before income taxes									19,855	16,335	20,026
Total Consolidated Assets	117,135				112,604				117,135	112,604
IT Consulting
Segment Reporting Information [Line Items]
Total revenues									17,997	20,007	18,460
Capital expenditures									0	1	10
Capitalized Software									0	0	0
Depreciation and amortization									5	7	7
Interest income									0	0	0
Earnings (loss) before income taxes									332	964	985
Total Consolidated Assets	5,200				4,599				5,200	4,599
Other
Segment Reporting Information [Line Items]
Total revenues									2,451	2,403	2,630
Capital expenditures									264	876	1,155
Capitalized Software									0	0	0
Depreciation and amortization									371	340	196
Interest income									695	684	532
Earnings (loss) before income taxes									(13,389)	(9,658)	(5,296)
Total Consolidated Assets	$ 48,958				$ 44,107				48,958	44,107
Operating income/(loss) before intersegment eliminations
Segment Reporting Information [Line Items]
Operating income									6,048	5,276	13,531
Operating income/(loss) before intersegment eliminations | Supply Chain Management
Segment Reporting Information [Line Items]
Operating income									19,612	15,967	19,580
Operating income/(loss) before intersegment eliminations | IT Consulting
Segment Reporting Information [Line Items]
Operating income									332	964	985
Operating income/(loss) before intersegment eliminations | Other
Segment Reporting Information [Line Items]
Operating income									$ (13,896)	$ (11,655)	$ (7,034)