Warranty (Tables)

12 Months Ended

Sep. 30, 2016

Warranty

Schedule of warranty cost and accrual information

	2016			2015
Warranty accrual as of October 1,	$	878,901		$	777,599
Accrued expense for fiscal year	409,013			290,910
Warranty cost incurred for fiscal year	(278,546		)	(189,608		)
Warranty accrual as of September 30,	$	1,009,368		$	878,901