Equity (Narrative) (Details)			3 Months Ended		6 Months Ended
	Dec. 14, 2016 USD ($) shares	Oct. 18, 2016 USD ($) shares	Mar. 31, 2017 USD ($) plan shares	Mar. 31, 2016 USD ($) shares	Mar. 31, 2017 USD ($) plan $ / shares shares	Mar. 31, 2016 USD ($) $ / shares shares	Sep. 30, 2016 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 | $					$ 856,000	$ 80,000
Stock-based compensation expense | $			$ 829,000	$ 613,000	1,592,000	976,000
Cash matching contribution | $			$ 200,000	$ 100,000	$ 300,000	$ 200,000
Weighted average antidilutive options, unvested restricted stock units and awards, warrants and ESPP shares excluded from the computation (in shares)			370,000	721,000	550,000	794,000
Discontinued Operations [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $			$ (20,000)	$ (100,000)	$ (11,000)	$ (100,000)
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		$ 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					4 years
Stock options, average maximum vesting period					5 years
Stock options, contractual life					10 years
Unrecognized compensation expense | $			100,000		$ 100,000
Unrecognized compensation expense, period for recognition					3 years 3 months 26 days
Stock-based compensation expense | $			11,000	10,000	$ 22,000	16,000
Restricted Stock Awards [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period					3 years
Restricted Stock Awards [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period					4 years
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining unamortized stock-based compensation expense | $			$ 3,700,000		$ 3,700,000
Remaining unamortized stock-based compensation expense, period for recognition					2 years 8 months 16 days
Unvested restricted stock units (in shares)			835,403		835,403		878,416
Outstanding non-vested RSUs aggregate intrinsic value | $			$ 7,500,000		$ 7,500,000
Outstanding non-vested RSUs weighted average remaining contractual term					1 year 8 months 9 days
Share-based compensation arrangement by share-based payment award, equity instruments other than options, aggregate intrinsic value, vested | $					$ 2,800,000	$ 1,400,000
Share-based compensation arrangement, by share-based payment award, options, vested and expected to vest, exercisable (in shares)			800,000		800,000
Share based compensation arrangement, by share based payment award, equity instruments other than options, expected to vest, intrinsic value | $			$ 6,900,000		$ 6,900,000
Share based compensation arrangement, by share based payment award, equity investments other than options, expected to vest, weighted average contractual term					1 year 8 months 12 days
Granted (in usd per share) | $ / shares					$ 8.04	$ 5.22
Granted (in shares)					267,009
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 Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units (in shares)			366,849		366,849		0
Share-based compensation arrangement by share-based payment award, equity instruments other than options, aggregate intrinsic value, vested | $					$ 3,300,000
Share-based compensation arrangement, by share-based payment award, options, vested and expected to vest, exercisable (in shares)			300,000		300,000
Share based compensation arrangement, by share based payment award, equity instruments other than options, expected to vest, intrinsic value | $			$ 3,100,000		$ 3,100,000
Share based compensation arrangement, by share based payment award, equity investments other than options, expected to vest, weighted average contractual term					1 year 9 months 11 days
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 | $			2,200,000		$ 2,200,000
Share-based compensation arrangement by share-based payment award, equity instruments other than options, outstanding, weighted average remaining contractual term					1 year 9 months 11 days
Stock-based compensation expense | $			$ 371,000	$ 0	$ 639,000	$ 0
Performance Shares [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 Shares [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 Shares [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period					1 year
Award vesting rights		0.00%
Performance Shares [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