Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2018		Aug. 31, 2017
Cash flows from operating activities:
Net (loss) income	$ (1,515)		$ 10
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Stock-based compensation expense	256		216
Provision for doubtful accounts	0		31
Depreciation and amortization	111		89
Changes in operating assets and liabilities:
Accounts receivable	563		(1,260)
Inventories	(536)		(2,044)
Prepaid expenses and other assets	4		(1,089)
Accounts payable	(398)		651
Accrued expenses	(151)		(21)
Customer deposits and deferred revenue	609		(440)
Deferred rent	82		0
Income taxes payable	4		(20)
Net cash used in operating activities	(971)		(3,877)
Cash flows from investing activities:
Purchases of property and equipment	(84)		(184)
Net cash used in investing activities	(84)		(184)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee plans, net of taxes paid related to share settlement of equity awards	109		234
Net cash provided by financing activities	109		234
Effect of exchange rates on cash and cash equivalents	(38)		17
Net decrease in cash and cash equivalents	(984)		(3,810)
Cash and cash equivalents, beginning of period	16,848	[1]	17,803
Cash and cash equivalents, end of period	15,864		13,993
Supplemental disclosure of non-cash flow information:
Transfer of property and equipment to inventories	$ 0		$ 372

[1] The condensed consolidated balance sheet at May 31, 2018 has been derived from the audited consolidated financial statements at that date.