Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended
	Apr. 01, 2009	Jul. 31, 2013
Cash equivalents maturity period		three months or less
Investment interest in initially recorded at cost		20.00%
Uncertain income tax		50.00%
Carrying value of the Company's investment in Symbio Investment Corp		$ 990,000
Maximum [Member]
Property plant and equipments estimated useful lives of assets		5 years
Investment interest in equity method		50.00%
Cost of satisfying warranty claims		1.00%
Minimum [Member]
Property plant and equipments estimated useful lives of assets		3 years
Investment interest in equity method		20.00%
Cost of satisfying warranty claims		0.50%
Cortelco Products [Member] | Maximum [Member]
Product warranty period		5 years
Cortelco Products [Member] | Minimum [Member]
Product warranty period		1 year
Subsidiaries [Member]
Investment interest in equity method		20.00%
Former Shareholders [Member]
Discount rate of Cortelco	15.22%	15.22%