Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2012	Apr. 30, 2011
Cash Flows from Operating Activities:
Net income	$ 1,219	$ 872
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	91	36
Depreciation	359	402
Amortization	217	223
Provision for doubtful accounts	23	125
Loss on disposal of equipment	6	13
Deferred taxes	(1)	(91)
Changes in operating assets and liabilities:
Accounts receivable	147	(344)
Inventories	(60)	163
Income tax refund claims receivable	(13)	486
Accounts payable	(423)	(477)
Accrued expenses	(308)	407
Income taxes payable	(46)	51
Other, net	14	20
Net cash provided by operating activities	1,225	1,886
Cash Flows from Investing Activities:
Purchases of property and equipment	(267)	(43)
Net cash (used in) investing activities	(267)	(43)
Cash Flows from Financing Activities:
Proceeds from exercise of stock options	77	2
Principal payments on long-term debt	(159)	(128)
Principal payments on notes payable to bank	(1,200)	(1,750)
Net cash (used in) financing activities	(1,282)	(1,876)
Net (decrease) in cash	(324)	(33)
Cash at beginning of year	460	493
Cash at end of year	136	460
Supplemental Disclosures of Cash Flow Information:
Cash paid during the period for interest	166	292
Cash paid during the period for income taxes	$ 792	$ 16