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Income Taxes: (Tables)

12 Months Ended

Sep. 30, 2013

Income Taxes:

Schedule of components of income taxes

		For the Fiscal Year Ended September 30,
		2013			2012			2011
Current provision (benefit):
Federal		$	432,211		$	46,792		$	183,527
State		(2,731		)	(9,476		)	(518		)
Total current provision		429,480			37,316			183,009
Deferred (benefit) provision:
Federal		(255,154		)	(2,435,049		)	—
State		(54,484		)	670			751
Total deferred (benefit) provision		(309,638		)	(2,434,379		)	751
Total current and deferred (benefit) provision		$	119,842		$	(2,397,063	)	$	183,760

Schedule of reconciliation of the statutory federal rate to the Company's effective income tax rate

		For the Fiscal Year Ended September 30,
		2013		2012		2011
U.S. Federal statutory tax rate		34.0	%	34.0	%	34.0	%
State income taxes, net of federal benefit		(1.3	)%	6.5	%	(7.1	)%
Permanent items		(2.9	)%	(1.8	)%	(0.4	)%
Research and development tax credits		(27.4	)%	(3.6	)%	(27.5	)%
Valuation allowance		(0.8	)%	(433.5	)%	14.2	%
Change in unrecognized tax benefits		4.4	%	(13.5	)%	7.2	%
Effective income tax rate		6.0	%	(411.9	)%	20.4	%

Schedule of deferred tax assets and liabilities

		As of September 30,
		2013						2012
		Current			Non Current			Current			Non Current
Deferred tax assets:
Reserves and accruals		$	1,657,601		$	196,312		$	1,514,711		$	240,390
Research and development credits		349,195			548,952			80,000			774,318
NOL carryforwards - state		1,600			1,246,615			—			1,236,554
Stock options		—			714,040			—			614,087
Depreciation		—			(626,063		)	—			(576,589		)
Other		—			4,023			—			6,304
		2,008,396			2,083,879			1,594,711			2,295,064
Less valuation allowance		(5,717		)	(1,432,881		)	(6,549		)	(1,448,177		)
Total net deferred tax assets		2,002,679			650,998			1,588,162			846,887
Deferred tax liabilities:
Depreciation		—			(132,202		)	—			(128,998		)
Total deferred tax liabilities		—			(132,202		)	—			(128,998		)
Net deferred tax asset		$	2,002,679		$	518,796		$	1,588,162		$	717,889

Schedule of reconciliation of beginning and ending balances of total amounts of gross unrecognized tax benefits

		For the Fiscal Year Ended September 30,
		2013			2012			2011
Balance at beginning of year		$	403,000		$	491,000		$	425,000
Unrecognized tax benefits related to prior years		—			—			—
Unrecognized tax benefits related to current year		120,000			12,000			67,000
Settlements		—			—			—
Decrease in unrecognized tax benefits due to the lapse of applicable statute of limitations		(31,000		)	(100,000		)	(1,000		)
Balance at end of year		$	492,000		$	403,000		$	491,000

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of the change in unrecognized tax benefits.

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