Warranty: (Tables)

12 Months Ended

Sep. 30, 2015

Warranty:

Schedule of warranty cost and accrual information

	2015			2014
Warranty accrual as of October 1,	$	777,599		$	701,456
Accrued expense for fiscal year	290,910			265,362
Warranty cost incurred for fiscal year	(189,608		)	(189,219		)
Warranty accrual as of September 30,	$	878,901		$	777,599