Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Feb. 29, 2020	Feb. 28, 2019
Cash flows from operating activities:
Net income (loss)	$ 83	$ (5,345)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Stock-based compensation expense	611	705
Recovery of doubtful accounts	0	(3)
Depreciation and amortization	298	333
Gain on disposal of fixed asset	(2)	0
Changes in operating assets and liabilities:
Accounts receivable	1,360	871
Inventories	(157)	(121)
Prepaid expenses and other assets	170	(47)
Accounts payable	(1,033)	(1,132)
Accrued expenses	(674)	431
Customer deposits and deferred revenue	(1,315)	(582)
Deferred rent	0	88
Income taxes payable	19	9
Net cash used in operating activities	(640)	(4,793)
Cash flows from investing activities:
Purchases of property and equipment	(151)	(124)
Proceeds from sales of property and equipment	2	0
Net cash used in investing activities	(149)	(124)
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	423	435
Net cash provided by financing activities	423	435
Effect of exchange rates on cash and cash equivalents	(4)	(66)
Net decrease in cash, cash equivalents and restricted cash	(370)	(4,548)
Cash, cash equivalents and restricted cash, beginning of period	5,508	16,848
Cash, cash equivalents and restricted cash, end of period	5,138	12,300
Supplemental disclosure of non-cash flow information:
Transfers of property and equipment to inventories	$ 112	$ 20