Legal Proceedings and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended	35 Months Ended
	Mar. 15, 2013	Feb. 28, 2013 Australia and New Zealand Discontinued Operations [Member]	Feb. 28, 2013 Australia and New Zealand Discontinued Operations [Member]	Nov. 30, 2012 Australia and New Zealand Discontinued Operations [Member]
Loss Contingencies [Line Items]
Cash		$ 200,000	$ 200,000
Amount of proceeds in escrow			2,000,000
Number of equal installment payments release of escrow (in number of payments)			4
Escrowed payments received		775,000		1,225,000
Amount of allowance established to cover arbitrator's award and other cost		163,000	163,000
Contractual obligation settlement amount	3,400,000
Contractual obligation payments period	45 days
Contractual obligation settlement amount net of litigation expenses	$ 2,100,000