Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Cash Flows from Operating Activities
Net earnings	$ 5,365	$ 4,620	$ 3,877
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	2,761	2,702	2,592
Bad debt provision	344	37	74
Stock based compensation expense	355	199	192
Provision (benefit) for deferred income tax expense	1,127	234	(335)
Change in assets and liabilities:
(Increase) decrease in receivables	(3,115)	(2,091)	1,197
(Increase) decrease in inventories	(2,727)	691	(2,881)
Increase in accounts payable and other accrued expenses	4,560	686	1,351
(Decrease) increase in deferred revenue	(3,922)	5,021	569
Other, net	(1,565)	(437)	635
Net cash provided by operating activities	3,183	11,662	7,271
Cash Flows from Investing Activities
Capital expenditures	(3,395)	(2,611)	(2,187)
Decrease in restricted cash	193	132	709
Net cash used in investing activities	(3,202)	(2,479)	(1,478)
Cash Flows from Financing Activities
Dividends paid	(1,794)	(1,570)	(1,361)
Dividends paid to noncontrolling interest in subsidiaries	(74)	(56)	(75)
Proceeds from short-term borrowings	59,069	51,407	48,706
Repayments on short-term borrowings	(58,775)	(51,634)	(49,843)
Payment toward purchase of noncontrolling interest in subsidiary			(888)
Payments on long-term debt	(918)	(421)	(422)
Net proceeds from exercise of stock options (including tax benefit)	8	190	479
Net cash used in financing activities	(2,484)	(2,084)	(3,404)
Effect of exchange rate changes on cash, net	(287)	185	(211)
(Decrease) Increase in Cash and Cash Equivalents	(2,790)	7,284	2,178
Cash and Cash Equivalents at Beginning of Year	12,506	5,222	3,044
Cash and Cash Equivalents at End of Year	9,716	12,506	5,222
Supplemental Disclosure of Cash Flow Information
Interest paid	295	292	306
Income taxes paid	$ 2,872	$ 2,618	$ 2,387