Fair Value Measurements (Details) (USD $)	1 Months Ended	0 Months Ended		0 Months Ended	12 Months Ended
	Feb. 29, 2012 item	Feb. 11, 2011 Recurring basis Level 3 ConFirm Monitoring Business	Mar. 31, 2012 Recurring basis Level 3 ConFirm Monitoring Business	Aug. 02, 2011 Recurring basis Level 3 Byrne Medical Business	Jul. 31, 2013 Recurring basis Level 3 Byrne Medical Business
Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis
Number of existing senior lenders of debt, whose variable interest cash flows will be exchanged by the entity with fixed interest cash flows	1
Cash flow projection period of the acquiree used to estimate fair value		1 year
Discount rate of cash flow projections (as a percent)		7.00%		14.00%
Initial contingent consideration liability		$ 656,000		$ 2,700,000
Price floor period				3 years
Impact of $1.00 decrease in stock price on fair value of price floor liability					11,000
Impact of $1.00 increase in stock price on fair value of price floor liability					9,000
Contingent consideration paid			855,000
Initial price floor				$ 3,000,000
Contingent consideration period				2 years