Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Nov. 30, 2012		Nov. 30, 2011
Cash flows from operating activities:
Net loss	$ (1,107)		$ (1,249)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	226		337
Provision for doubtful accounts	5		8
Gain on sale of long-term investment	0		(990)
Depreciation and amortization	170		268
Changes in operating assets and liabilities:
Accounts receivable	(297)		(661)
Inventories	(304)		(622)
Prepaid expenses and other	(193)		(60)
Accounts payable	54		483
Accrued expenses and deferred revenue	240		151
Income tax payable	14		(55)
Deferred lease commitment, net of current	(37)		(29)
Net cash used in operating activities	(1,229)		(2,419)
Cash flows from investing activities:
Proceeds from sale of investments	0		1,375
Purchase of property and equipment	(21)		(18)
Net cash (used in) provided by investing activities	(21)		1,357
Cash flows from financing activities:
Line of credit borrowings, net	277		0
Proceeds from issuance of common stock and excercise of stock options	180		114
Net cash provided by financing activities	457		114
Effect of exchange rates on cash	(88)		54
Net decrease in cash and cash equivalents	(881)		(894)
Cash and cash equivalents, beginning of period	2,073	[1]	4,020
Cash and cash equivalents, end of period	1,192		3,126
Supplemental disclosure of non-cash flow information:
Net change in capitalized share-based compensation	$ 67		$ 0

[1] The condensed consolidated balance sheet at May 31, 2012 has been derived from the audited consolidated financial statements at that date.