Summary of Significant Accounting Policies (Details Textual) (USD $)	3 Months Ended								12 Months Ended			1 Months Ended		12 Months Ended			12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Nov. 30, 2012 Langfield Facility [Member] acre sqft	Dec. 31, 2012 Bogota Facility [Member] WarehouseAndOfficeBuilding	Sep. 30, 2013 Patents [Member]	Sep. 30, 2012 OYO Subsidiaries [Member]	Sep. 30, 2011 OYO Subsidiaries [Member]	Sep. 30, 2012 Russian Subsidiary [Member]	Sep. 30, 2011 Russian Subsidiary [Member]	Sep. 30, 2012 Customer one [Member]	Sep. 30, 2011 Customer one [Member]	Sep. 30, 2010 Customer one [Member]	Sep. 30, 2012 Customer two [Member]	Sep. 30, 2011 Customer two [Member]
Significant Accounting Policies (Textual) [Abstract]
Common stock owned															0.00%	20.30%
Percentage of trade accounts receivables																			17.70%	15.50%			13.30%
Percentage of company revenue																				20.20%	13.20%		11.10%
Percentage of notes receivable									60.40%										88.30%			39.60%
Net working capital related to this subsidiary																	$ 6,300,000	$ 6,400,000
Sales	36,949,000	55,201,000	56,233,000	43,281,000	32,805,000	46,368,000	50,696,000	43,101,000	191,664,000	172,970,000	128,533,000						4,100,000	5,200,000
Finite-Lived Intangible Assets [Line Items]
Patent amortization expense									200,000	200,000	200,000			80,000
Significant Accounting Policies (Additional Textual 1) [Abstract]
Area of building acquired												30,000
Area of land acquired												3.4
Cost of land and building									4,013,000	4,730,000	2,224,000	2,500,000	1,600,000
Number of warehouse and office building													19,000
Significant Accounting Policies (Additional Textual) [Abstract]
Sales under bill and hold arrangements	0				0				0	0
Minimum credit limit									30 days
Number of credit limit extended									60 days
stock-based compensation expenses									800,000	700,000	400,000
stock options granted during fiscal years									0	0	126,000
shipping and handling costs									$ 1,000,000	$ 700,000	$ 700,000