Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Sep. 30, 2013
Income Taxes [Line Items]
Total incomes taxes paid									$ 1,981,000	$ 202,000
Unrecognized tax benefits	300,000				300,000				300,000	300,000
Additional accruals of UTB's									0	0
Additional accruals of interest expense nor penalties									0	0
Income tax expense (benefit)	(1,572,000)	977,000	1,100,000	435,000	(1,163,000)	873,000	733,000	(835,000)	940,000	(392,000)
R&D tax credits carryforwards	671,000				805,000				671,000	805,000
Net deferred income and other tax liabilities	(693,000)				(484,000)				(693,000)	(484,000)
Florida [Member]
Income Taxes [Line Items]
R&D Credits									244,000
Reduction for income taxes payable									(65,000)
R&D tax credits carryforwards	179,000								179,000
Tax Credit Carryforward, Expiration Date									Sep. 30, 2019
Federal [Member]
Income Taxes [Line Items]
R&D Credits										2,129,000
Reduction for income taxes payable									(313,000)	(497,000)
R&D tax credits carryforwards	492,000				805,000				492,000	805,000
Federal [Member] | Tax Years 2006 Through 2010 [Member]
Income Taxes [Line Items]
Tax refunds related to R&D Credits for tax years 2006 through 2008										827,000
Federal [Member] | Tax Years 2009 Through 2012 [Member]
Income Taxes [Line Items]
R&D Credits										$ 1,302,000
Federal [Member] | Earliest Tax Year [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Expiration Date									Sep. 30, 2031
Federal [Member] | Latest Tax Year [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Expiration Date									Sep. 30, 2033