Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
Cash Flows from Operating Activities:
Net income (loss)	$ 264,000	$ (161,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Share-based compensation expense	46,000	27,000
Depreciation	94,000	85,000
Amortization	51,000	51,000
Provision for doubtful accounts	22,000	12,000
Deferred income taxes	(16,000)	53,000
Changes in operating assets and liabilities:
Accounts receivable	247,000	919,000
Inventories	(599,000)	56,000
Income tax payable/receivable	173,000	(140,000)
Accounts payable	(15,000)	46,000
Accrued expenses	49,000	(153,000)
Other	(64,000)	(14,000)
Net cash provided by operating activities	252,000	781,000
Cash Flows from Investing Activities:
Purchases of property and equipment	(113,000)	(46,000)
Net cash (used in) investing activities	(113,000)	(46,000)
Cash Flows from Financing Activities:
Principal payments on note payable to bank		(750,000)
Purchases of common stock for repurchase program	(92,000)
Proceeds from the exercise of stock options	13,000
Principal payments on long-term debt	(46,000)	(44,000)
Net cash (used in) financing activities	(125,000)	(794,000)
Net increase (decrease) in cash and cash equivalents	14,000	(59,000)
Cash and cash equivalents at beginning of period	1,464,000	136,000
Cash and cash equivalents at end of period	1,478,000	77,000
Supplemental Disclosure of Cash Flow Information:
Cash paid during the period for interest	14,000	22,000
Cash paid (received) during the period for income taxes	$ 17,000	$ (1,000)