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PREPAID WORKERS' COMPENSATION: (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Mar. 31, 2013
Sep. 30, 2012
Mar. 31, 2013
Workers compensation program, Zurich
PREPAID WORKERS' COMPENSATION:      
Prepaid asset $ 462 $ 516 $ 500
Period over which remaining prepaid asset will be received     12 months