Equity Narrative (Details)			3 Months Ended		9 Months Ended
	Jun. 15, 2015 USD ($) $ / shares shares	Dec. 10, 2014 shares	Jun. 30, 2015 USD ($) plan shares	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) plan $ / shares shares	Jun. 30, 2014 USD ($) $ / shares	Apr. 30, 2015 USD ($)	Sep. 30, 2014 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount							$ 45,000,000
Common stock shares repurchased (shares) | shares	6,900,000
Treasury stock, purchase price (USD per share) | $ / shares	$ 6.55
Treasury stock, costs incurred	$ 600,000
Number of equity incentive compensation plans maintained by the company | plan			3		3
Unrecognized compensation expense, period for recognition					3 years 9 months
Unvested restricted stock units | shares			607,171		607,171
Share-based compensation, included in discontinued operations			$ 0	$ 300,000	$ 900,000	$ 1,000,000
Employee stock options
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			200,000		$ 200,000
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period					3 years
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining unamortized stock-based compensation expense			$ 2,500,000		$ 2,500,000
Remaining unamortized stock-based compensation expense, period for recognition (in years)					2 years 3 months 7 days
Unvested restricted stock units | shares			607,171		607,171			966,579
Outstanding non-vested RSUs aggregate intrinsic value			$ 3,700,000		$ 3,700,000
Outstanding non-vested RSUs weighted average remaining contractual term (in years)					1 year 4 months 24 days
Share-based compensation arrangement by share-based payment award, equity instruments other than options, aggregate intrinsic value, vested					$ 4,400,000	$ 1,700,000
Share-based compensation arrangement, by share-based payment award, options, vested and expected to vest, exercisable, number | shares			600,000		600,000
Share based compensation arrangement, by share based payment award, equity instruments other than options, expected to vest, intrinsic value			$ 3,400,000		$ 3,400,000
Share based compensation arrangement, by share based payment award, equity investments other than options, expected to vest, weighted average contractual term (in years)					1 year 4 months 17 days
Weighted average grant date fair value, shares granted (USD per share) | $ / shares					$ 5.38	$ 4.89
Vested (in shares) | shares		300,000			841,609
Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Purchase Plan (ESPP), biannual plan duration					6 months
Employee Stock Purchase Plan (ESPP), employee purchase price percentage					85.00%
Employee Stock Purchase Plan (ESPP), annual employee contribution limit percentage					10.00%
Accelerated compensation cost					$ 25,000