Condensed Consolidated Statements of Operations (USD $)	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net revenue	$ 10,019,000	$ 4,948,000
Costs and expenses:
Production costs	8,487,000	4,531,000
Product engineering and development	380,000	448,000
Selling, general and administrative	1,734,000	1,959,000
Total operating expenses	10,601,000	6,938,000
Operating loss	(582,000)	(1,990,000)
Other income (expense), net:
Interest and dividend income, net of fees	940,000	690,000
Realized and unrealized gains (losses) on marketable securities	538,000	(526,000)
Other	(15,000)	15,000
Other income (expense), net	1,463,000	179,000
Income (loss) before income tax expense (benefit)	881,000	(1,811,000)
Income tax expense (benefit)	435,000	(835,000)
Net Income (Loss)	$ 446,000	$ (976,000)
Basic Income (Loss) per Common Share:
Net income (loss) per share	$ 0.05	$ (0.10)
Diluted Income (Loss) per Common Share:
Net income (loss) per share	$ 0.05	$ (0.10)