Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Nov. 30, 2016		Nov. 30, 2015
Cash flows from operating activities:
Net loss	$ (2,207)		$ (754)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	534		573
Provision for doubtful accounts	12		17
Amortization of debt issuance costs	89		82
Depreciation and amortization	129		73
Changes in operating assets and liabilities:
Accounts receivable	(972)		(1,196)
Inventories	1,335		(316)
Prepaid expenses and other current assets	(138)		(139)
Accounts payable	721		687
Accrued expenses	(201)		439
Customer deposits and deferred revenue	(739)		(3,328)
Income taxes payable	21		9
Net cash used in operating activities	(1,416)		(3,853)
Cash flows from investing activities:
Purchases of property and equipment	(88)		(169)
Net cash used in investing activities	(88)		(169)
Cash flows from financing activities:
Proceeds from issuance of common stock under private placement, net of issuance costs	5,299		0
Proceeds from issuance of common stock under employee plans, net of taxes paid related to share settlement of equity awards	463		460
Net cash provided by financing activities	5,762		460
Effect of exchange rates on cash and cash equivalents	(43)		(10)
Net increase (decrease) in cash and cash equivalents	4,215		(3,572)
Cash and cash equivalents, beginning of period	939	[1]	5,527
Cash and cash equivalents, end of period	5,154		1,955
Supplemental disclosure of non-cash flow information
Net change in capitalized share-based compensation	0		(20)
Fair value of common stock issued to settle accounts payable	323		0
Transfers of property and equipment to inventories	$ 372		$ 0

[1] The condensed consolidated balance sheet at May 31, 2016 has been derived from the audited consolidated financial statements at that date.