Equity (Narrative) (Details)			3 Months Ended		9 Months Ended
	Dec. 14, 2016 USD ($) shares	Oct. 18, 2016 USD ($) shares	Jun. 30, 2017 USD ($) plan shares	Jun. 30, 2016 USD ($) shares	Jun. 30, 2017 USD ($) plan $ / shares shares	Jun. 30, 2016 USD ($) $ / shares shares	Sep. 30, 2016 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive compensation plans maintained by the company | plan			3		3
Cumulative-effect adjustment to decrease accumulated deficit | $			$ (565,177,000)		$ (565,177,000)		$ (571,207,000)
Intrinsic value of shares exercised | $					887,000	$ 82,000
Stock-based compensation expense | $			1,080,000	$ 727,000	2,672,000	1,703,000
Cash matching contribution | $			$ 100,000	$ 100,000	$ 400,000	$ 300,000
Weighted average antidilutive options, unvested restricted stock units and awards, warrants and ESPP shares excluded from the computation (in shares)			370,000	522,000	400,000	528,000
Discontinued Operations [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $			$ 11,000	$ (19,000)	$ 0	$ (75,000)
2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized (in shares)					2,400,000
Shares authorized (in shares)			5,301,366		5,301,366
Maximum cash earned in connection with the grant | $					$ 1,000,000
Employee stock purchase plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan (ESPP), employee purchase price percentage					85.00%
Employee stock purchase plan (ESPP), annual employee contribution limit percentage					10.00%
Share-based compensation arrangement by share-based payment award accelerated compensation cost | $					$ 25,000
Employee stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, average minimum vesting period (in years)					4 years
Stock options, average maximum vesting period (in years)					5 years
Stock options, contractual life (in years)					10 years
Unrecognized compensation expense | $			$ 100,000		$ 100,000
Unrecognized compensation expense, period for recognition (in years)					3 years 15 days
Stock-based compensation expense | $			12,000	9,000	$ 34,000	25,000
Restricted Stock Awards [Member] | Minimum [Member] | Equity incentive plans 2012 and 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					3 years
Restricted Stock Awards [Member] | Maximum [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					3 years
Restricted Stock Awards [Member] | Maximum [Member] | Equity incentive plans 2012 and 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					4 years
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining unamortized stock-based compensation expense | $			$ 4,000,000		$ 4,000,000
Remaining unamortized stock-based compensation expense, period for recognition (in years)					2 years 6 months 4 days
Unvested restricted stock units (in shares)			800,665		800,665		878,416
Outstanding non-vested RSUs aggregate intrinsic value | $			$ 8,500,000		$ 8,500,000
Outstanding non-vested RSUs weighted average remaining contractual term (in years)					1 year 7 months 2 days
Share-based compensation arrangement by share-based payment award, equity instruments other than options, aggregate intrinsic value, vested | $					$ 3,300,000	$ 1,600,000
Granted (in usd per share) | $ / shares					$ 8.44	$ 5.55
Granted (in shares)					307,509
Vested (in shares)					351,489
Restricted stock units [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		70,000
Grant date fair value | $		$ 400,000
Performance stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining unamortized stock-based compensation expense, period for recognition (in years)					1 year 6 months 4 days
Unvested restricted stock units (in shares)			362,041		362,041		0
Share-based compensation arrangement by share-based payment award, equity instruments other than options, aggregate intrinsic value, vested | $					$ 3,900,000
Granted (in usd per share) | $ / shares					$ 8.34
Granted (in shares)	71,669				366,849	0
Grant date fair value | $	$ 1,000,000
Unamortized stock based compensation | $			$ 1,900,000		$ 1,900,000
Share-based compensation arrangement by share-based payment award, equity instruments other than options, outstanding, weighted average remaining contractual term (in years)					1 year 6 months 4 days
Vested (in shares)					0	0
Stock-based compensation expense | $			$ 410,000	$ 0	$ 1,049,000	$ 0
Performance stock units [Member] | Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		195,180
Grant date fair value | $		$ 1,400,000
Performance stock units [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		100,000
Grant date fair value | $		$ 700,000
Performance stock units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights	0.00%
Performance stock units [Member] | Minimum [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					1 year
Performance stock units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights	200.00%
Tranche One [Member] | Employee stock options [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)			200,000		200,000
Tranche One [Member] | Stock Appreciation Rights (SARs) [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)			200,000		200,000
Tranche One [Member] | Restricted Stock Awards [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)			200,000		200,000
Tranche One [Member] | Restricted stock units [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)			200,000		200,000
Tranche One [Member] | Stock Purchase Rights [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)			200,000		200,000
Tranche One [Member] | Share Awards [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)			200,000		200,000
Tranche Two [Member] | Employee stock options [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)			400,000		400,000
Tranche Two [Member] | Stock Appreciation Rights (SARs) [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)			400,000		400,000
Tranche Two [Member] | Restricted Stock Awards [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)			400,000		400,000
Tranche Two [Member] | Restricted stock units [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)			400,000		400,000
Tranche Two [Member] | Stock Purchase Rights [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)			400,000		400,000
Tranche Two [Member] | Share Awards [Member] | 2012 equity incentive plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)			400,000		400,000
Accounting Standards Update 2016-09 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative-effect adjustment to decrease accumulated deficit | $							$ 200,000