Equity (Narrative) (Details)		3 Months Ended		6 Months Ended
	Dec. 10, 2014 USD ($) employee shares	Mar. 31, 2016 USD ($) plan shares	Mar. 31, 2015 USD ($)	Mar. 31, 2016 USD ($) plan shares	Mar. 31, 2015 USD ($)	Sep. 30, 2015 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
Intrinsic value of shares exercised				$ 80,000	$ 95,000
Unvested restricted stock units (in shares) | shares		590,995		590,995
Stock-based compensation expense		$ 613,000	$ 1,034,000	$ 976,000	2,808,000
Cash matching contribution		100,000		$ 200,000
Discontinued Operations [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					900,000
Employee stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, average minimum vesting period				4 years
Stock options, average maximum vesting period				5 years
Stock options, contractual life				10 years
Unrecognized compensation expense		200,000		$ 200,000
Unrecognized compensation expense, period for recognition				3 years 11 months 27 days
Number of shares affected (in shares) | shares	56,000
Incremental expense (benefit) with modification	$ (200,000)
Stock-based compensation expense		10,000	7,000	$ 16,000	184,000
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				3 years
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares affected (in shares) | shares	147,000
Number of employees affected | employee	80
Incremental expense (benefit) with modification	$ 49,000
Remaining unamortized stock-based compensation expense		$ 2,600,000		$ 2,600,000
Remaining unamortized stock-based compensation expense, period for recognition				2 years 2 months 12 days
Unvested restricted stock units (in shares) | shares		590,995		590,995		570,231
Outstanding non-vested RSUs aggregate intrinsic value		$ 3,000,000		$ 3,000,000
Outstanding non-vested RSUs weighted average remaining contractual term				1 year 6 months
Share-based compensation arrangement by share-based payment award, equity instruments other than options, aggregate intrinsic value, vested				$ 1,400,000	4,400,000
Share-based compensation arrangement, by share-based payment award, options, vested and expected to vest, exercisable, number | shares		500,000		500,000
Share based compensation arrangement, by share based payment award, equity instruments other than options, expected to vest, intrinsic value		$ 2,700,000		$ 2,700,000
Share based compensation arrangement, by share based payment award, equity investments other than options, expected to vest, weighted average contractual term				1 year 6 months
Vested (in shares) | shares	300,000			251,970
Employee stock purchase plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		56,000	14,000	$ 111,000	64,000
401(k) match in common stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 0	$ 144,000	$ 0	$ 224,000
2012 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental shares authorized (in shares) | shares				500,000
Shares authorized (in shares) | shares		2,500,000		2,500,000
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
Non-employee Directors [Member] | 2012 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum grant date fair value limit				250,000
Non-employee Directors serving as Chairman or Lead Independent Director [Member] | 2012 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum grant date fair value limit				$ 350,000