Income Taxes: (Details 2) - USD ($)	Sep. 30, 2015	Sep. 30, 2014
Current deferred tax assets:
Reserves and accruals	$ 3,181,540	$ 2,880,747
Research and development credit		396,276
NOL carryforwards-state		5,500
Gross current deferred tax assets	3,181,540	3,282,523
Less: Valuation allowance	(2,248,041)	(37,300)
Total deferred tax assets	933,499	3,245,223
Net deferred tax asset	933,499	3,245,223
Non current deferred tax assets:
Reserves and accruals	139,717	170,562
Research and development credit	1,472,421	208,384
NOL carryforwards-state	1,200,156	1,237,553
Stock options	678,316	630,160
Depreciation	(741,736)	(795,050)
Other	897	4,105
Gross non current deferred tax assets	2,749,771	1,455,714
Less : Valuation allowance	(3,123,487)	(1,398,007)
Total deferred tax assets	(373,716)	57,707
Non current deferred tax liabilities:
Depreciation	(133,468)	(132,999)
Total deferred tax liabilities	(133,468)	(132,999)
Net deferred tax asset (liability)	$ (507,184)	$ (75,292)