Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Pretax loss
Domestic	$ (36,172)	$ (15,858)	$ (18,853)
Foreign	(418)	(70)	(75)
Loss before taxes	(36,590)	(15,928)	(18,928)
Current
Federal	(9,615)	(1,661)	(4,922)
State	(533)	(59)	(259)
Foreign	0	0	0
Total current	(10,148)	(1,720)	(5,181)
Deferred
Federal	(2,673)	(3,903)	(1,680)
State	(756)	(85)	119
Foreign	(108)	(9)	(10)
Total deferred	(3,537)	(3,997)	(1,571)
Change in valuation allowance	13,979	5,717	6,752
Total	294	0	0
Deferred tax assets
Property and equipment	314	150
Intangible assets	0	177
Goodwill	668	0
Deferred revenue	712	101
Accrued compensation	1,748	1,640
Share-based compensation	8,134	4,136
Accrued interest	0	657
Net domestic operating loss carryforwards	37,260	28,022
Net foreign operating loss carryforwards	128	19
Other	614	428
Deferred tax assets	49,578	35,330
Valuation allowance	(49,221)	(35,170)
Total deferred tax assets	357	160
Deferred tax liabilities
Software	(241)	0
Convertible debt- beneficial conversion feature	0	(160)
Intangible assets	(570)	0
Goodwill	0	(160)
Total deferred tax liabilities	811	320
Net deferred tax liabilities	(454)	(160)
Reconciliation of statutory federal rate of 35.0% to effective income tax rate
Tax provision (benefit) at the statutory rate (as a percent)	(35.00%)	(35.00%)	(35.00%)
State taxes, net of federal benefit (as a percent)	(1.90%)	(1.20%)	(1.80%)
Other (as a percent)	(0.50%)	0.30%	1.10%
Valuation allowance (as a percent)	38.20%	35.90%	35.70%
Effective tax rate (as a percent)	0.80%	0.00%	0.00%
Federal net operating loss carry-forwards (after tax)	35,139
State net operating loss carry-forwards (after tax)	2,983
Operating loss carry-forwards expiration period	10 years
Unrecognized Tax Benefits, Share-Based Compensation	$ 862
State [Member] | Minimum [Member]
Income Tax Examination [Line Items]
Period for statute of limitations	3 years
State [Member] | Maximum [Member]
Income Tax Examination [Line Items]
Period for statute of limitations	4 years
Foreign [Member]
Income Tax Examination [Line Items]
Period for statute of limitations	4 years