Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Jul. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$ 5,734	$ 6,230
Net (loss) income from operations	100	354
Total assets	13,127		13,606
Allowance for doubtful accounts	280		555
Depreciation and amortization	26	23
Communications Systems and Services [Member]
Segment Reporting Information [Line Items]
Revenues	348	375
Net (loss) income from operations	(147)	(167)
Total assets	1,960	2,566
Allowance for doubtful accounts	85	307
Depreciation and amortization	1	2
Telephony Products [Member]
Segment Reporting Information [Line Items]
Revenues	2,981	3,851
Net (loss) income from operations	150	495
Total assets	7,439	7,966
Capital expenditures	107	18
Allowance for doubtful accounts	15	16
Depreciation and amortization	10	7
Puerto Rico [Member]
Segment Reporting Information [Line Items]
Revenues	2,405	2,004
Net (loss) income from operations	97	26
Total assets	3,728	3,430
Capital expenditures	41	10
Allowance for doubtful accounts	180	60
Depreciation and amortization	15	14
Total [Member]
Segment Reporting Information [Line Items]
Revenues	5,734	6,230
Net (loss) income from operations	100	354
Total assets	13,127	13,962
Capital expenditures	148	28
Allowance for doubtful accounts	280	383
Depreciation and amortization	$ 26	$ 23