Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Nov. 30, 2019	Nov. 30, 2018
Cash flows from operating activities:
Net loss	$ (162)	$ (2,144)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	404	480
Recovery of doubtful accounts	0	(3)
Depreciation and amortization	193	230
Changes in operating assets and liabilities:
Accounts receivable	(372)	(1,068)
Inventories	(627)	(935)
Prepaid expenses and other assets	194	23
Accounts payable	389	302
Accrued expenses	(438)	(175)
Customer deposits and deferred revenue	139	231
Deferred rent	0	84
Income taxes payable	4	18
Net cash used in operating activities	(276)	(2,957)
Cash flows from investing activities:
Purchases of property and equipment	(123)	(103)
Net cash used in investing activities	(123)	(103)
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	293	312
Net cash provided by financing activities	293	312
Effect of exchange rates on cash and cash equivalents	(20)	(98)
Net decrease in cash, cash equivalents and restricted cash	(126)	(2,846)
Cash, cash equivalents and restricted cash, beginning of period	5,508	16,848
Cash, cash equivalents and restricted cash, end of period	5,382	14,002
Supplemental disclosure of non-cash flow information:
Transfers of property and equipment to inventories	$ 112	$ 0