Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Feb. 28, 2013		Feb. 29, 2012
Cash flows from operating activities:
Net loss	$ (2,565)		$ (2,610)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	427		519
Provision for doubtful accounts	(15)		(9)
Gain on sale of long-term investment	0		(990)
Depreciation and amortization	247		388
Changes in operating assets and liabilities:
Accounts receivable	951		535
Inventories	375		(694)
Prepaid expenses and other	(11)		(90)
Accounts payable	379		106
Accrued expenses and deferred revenue	(49)		(274)
Income tax payable	15		(44)
Deferred lease commitment	(57)		(43)
Net cash used in operating activities	(303)		(3,206)
Cash flows from investing activities:
Proceeds from sale of investments	0		1,375
Purchase of property and equipment	(126)		(20)
Net cash (used in) provided by investing activities	(126)		1,355
Cash flows from financing activities:
Line of credit (repayments) borrowings, net	(193)		716
Proceeds from issuance of common stock and excercise of stock options	180		114
Net cash (used in) provided by financing activities	(13)		830
Effect of exchange rates on cash	(250)		(24)
Net decrease in cash and cash equivalents	(692)		(1,045)
Cash and cash equivalents, beginning of period	2,073	[1]	4,020
Cash and cash equivalents, end of period	1,381		2,975
Supplemental disclosure of non-cash flow information:
Net change in capitalized share-based compensation	$ 25		$ 0

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