Long-Term Debt - Additional Information (Detail) (USD $)	6 Months Ended			6 Months Ended		1 Months Ended		6 Months Ended	1 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Oct. 31, 2011 Revolving loan	Mar. 31, 2014 Revolving loan Minimum	Mar. 31, 2014 Revolving loan Maximum	Oct. 31, 2011 Credit Agreement Amendment	Oct. 31, 2011 Term loan	Mar. 31, 2014 Term loan	Oct. 31, 2011 Credit Facility Term One Credit Agreement Amendment	Oct. 31, 2011 Credit Facility Term Two Credit Agreement Amendment
Debt Instrument [Line Items]
Credit agreement, maximum borrowing amount			$ 30,000,000			$ 40,000,000
Proceeds from revolving credit agreement	17,027,000	26,725,000							10,000,000	30,000,000
Period of credit agreement (in years)									5 years	5 years
Percentage of stock of non-U.S. subsidiaries pledged						65.00%
Quarterly installments payment							$ 500,000
Quarterly installments payment starting date								Dec. 01, 2011
Libor-based variable interest rate of term loan								2.20%
Effective fixed rate on term loan								2.90%
Interest rate on revolving loan, percentage added to Libor				0.75%	1.75%
Interest rate	1.00%
Commitment fee				0.10%	0.25%
Promissory note payable period	2013-11
Imputed interest rate used to discount	2.00%