CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014
Revenue:
Products	$ 184us-gaap_SalesRevenueGoodsNet	$ 426us-gaap_SalesRevenueGoodsNet	$ 454us-gaap_SalesRevenueGoodsNet	$ 1,042us-gaap_SalesRevenueGoodsNet
Services	741us-gaap_SalesRevenueServicesNet	916us-gaap_SalesRevenueServicesNet	2,362us-gaap_SalesRevenueServicesNet	3,089us-gaap_SalesRevenueServicesNet
Total revenue	925us-gaap_Revenues	1,342us-gaap_Revenues	2,816us-gaap_Revenues	4,131us-gaap_Revenues
Cost of revenue:
Products	38us-gaap_CostOfGoodsSold	241us-gaap_CostOfGoodsSold	124us-gaap_CostOfGoodsSold	302us-gaap_CostOfGoodsSold
Services	392us-gaap_CostOfServices	325us-gaap_CostOfServices	1,183us-gaap_CostOfServices	897us-gaap_CostOfServices
Total cost of revenue	430us-gaap_CostOfRevenue	566us-gaap_CostOfRevenue	1,307us-gaap_CostOfRevenue	1,199us-gaap_CostOfRevenue
Gross margin	495us-gaap_GrossProfit	776us-gaap_GrossProfit	1,509us-gaap_GrossProfit	2,932us-gaap_GrossProfit
Research and development expenses	183us-gaap_ResearchAndDevelopmentExpense	276us-gaap_ResearchAndDevelopmentExpense	677us-gaap_ResearchAndDevelopmentExpense	915us-gaap_ResearchAndDevelopmentExpense
Selling, general and administrative expenses	592	835	1,953	2,582
Gain on CADRA sale	0us-gaap_GainLossOnSaleOfProperties	0us-gaap_GainLossOnSaleOfProperties	0us-gaap_GainLossOnSaleOfProperties	(649)us-gaap_GainLossOnSaleOfProperties
Change in fair value of earn-out payments and holdback payment	(10)	0	(70)	0
Operating loss	(270)us-gaap_OperatingIncomeLoss	(335)us-gaap_OperatingIncomeLoss	(1,051)us-gaap_OperatingIncomeLoss	84us-gaap_OperatingIncomeLoss
Interest expense	31us-gaap_InterestExpense	10us-gaap_InterestExpense	158us-gaap_InterestExpense	203us-gaap_InterestExpense
Other (income) expense, net	55us-gaap_OtherOperatingIncomeExpenseNet	(6)us-gaap_OtherOperatingIncomeExpenseNet	98us-gaap_OtherOperatingIncomeExpenseNet	(28)us-gaap_OtherOperatingIncomeExpenseNet
Net loss	$ (356)us-gaap_NetIncomeLoss	$ (339)us-gaap_NetIncomeLoss	$ (1,307)us-gaap_NetIncomeLoss	$ (91)us-gaap_NetIncomeLoss
Basic and diluted net loss per share:	$ (0.40)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.39)us-gaap_EarningsPerShareBasicAndDiluted	$ (1.47)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.10)us-gaap_EarningsPerShareBasicAndDiluted
Weighted average common and redeemable shares outstanding-basic and diluted	893,724	875,135	888,906	883,853

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