Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2017		Aug. 31, 2016
Cash flows from operating activities:
Net income (loss)	$ 10		$ (755)
Adjustments to reconcile net (income) loss to net cash (used in) provided by operating activities:
Stock-based compensation expense	216		319
Provision for doubtful accounts	31		20
Amortization of debt issuance costs	0		44
Depreciation and amortization	89		68
Changes in operating assets and liabilities:
Accounts receivable	(1,260)		(1,250)
Inventories	(2,044)		1,374
Prepaid expenses and other assets	(1,089)		(52)
Accounts payable	651		713
Accrued expenses	(21)		(181)
Customer deposits and deferred revenue	(440)		946
Income taxes payable	(20)		(2)
Net cash (used in) provided by operating activities	(3,877)		1,244
Cash flows from investing activities:
Purchases of property and equipment	(184)		(21)
Net cash used in investing activities	(184)		(21)
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	234		94
Net cash provided by financing activities	234		94
Effect of exchange rates on cash and cash equivalents	17		86
Net (decrease) increase in cash and cash equivalents	(3,810)		1,403
Cash and cash equivalents, beginning of period	17,803	[1]	939
Cash and cash equivalents, end of period	13,993		2,342
Supplemental disclosure of non-cash flow information:
Fair value of common stock issued to settle accounts payable	0		323
Transfer of property and equipment to inventories	$ 372		$ 372

[1] The condensed consolidated balance sheet at May 31, 2017 has been derived from the audited consolidated financial statements at that date.