Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2014
Cash flows from operating activities:
Net (loss) income	$ (6,785)	$ (6,647)	$ 422
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Stock-based compensation expense	1,016	997	829
(Recovery of) provision for doubtful accounts	(13)	(30)	15
Loss (gain) on disposal of asset	2	0	(41)
Amortization of debt issuance costs	177	31	0
Depreciation and amortization	203	135	141
Changes in operating assets and liabilities:
Accounts receivable	887	1,774	(720)
Inventories	70	(1,008)	(740)
Prepaid expenses and other	9	34	(51)
Accounts payable	564	(850)	707
Accrued expenses	539	(371)	(25)
Customer deposits and deferred revenue	(2,909)	3,702	(984)
Income taxes payable	(41)	(15)	(65)
Deferred rent	0	(8)	(95)
Net cash used in operating activities	(6,281)	(2,256)	(607)
Cash flows from investing activities:
Purchases of property and equipment	(919)	(118)	(339)
Proceeds from sales of property and equipment	0	0	50
Net cash used in investing activities	(919)	(118)	(289)
Cash flows from financing activities:
Line of credit borrowings (repayments), net	2,000	(777)	(324)
Proceed from issuance of convertible notes, net	(6)	3,760	0
Proceeds from issuance of common stock under private placement, net of issuance cost	0	2,574	0
Proceeds from issuance of common stock under employee plans	512	855	715
Net cash provided by financing activities	2,506	6,412	391
Effect of exchange rates on cash and cash equivalents	106	(320)	(10)
Net (decrease) increase in cash and cash equivalents	(4,588)	3,718	(515)
Cash and cash equivalents, beginning of year	5,527	1,809	2,324
Cash and cash equivalents, end of year	939	5,527	1,809
Supplemental Cash Flow Information:
Cash paid during the year for Income taxes	47	26	44
Cash paid during the year for Interest	302	130	27
Non-cash transactions:
Net change in capitalized stock-based compensation	(20)	(4)	24
Line of credit converted to convertible notes	$ 2,000	$ 0	$ 0