Acquisition (Details) - USD ($)				3 Months Ended																12 Months Ended
	Jan. 09, 2017	Nov. 01, 2016	Oct. 05, 2015	Sep. 30, 2017		Jun. 30, 2017	[1],[2]	Mar. 31, 2017	[1],[2]	Dec. 31, 2016	[1],[2]	Sep. 30, 2016		Jun. 30, 2016	[1],[2]	Mar. 31, 2016	[1],[2]	Dec. 31, 2015	[1],[2]	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition [Line Items]
Goodwill				$ 131,995,000								$ 109,448,000								$ 131,995,000	$ 109,448,000	$ 100,183,000
Revenues																				181,634,000	203,005,000	203,847,000
Net income (loss)				4,343,000	[1],[2]	$ 1,335,000		$ 1,331,000		$ 2,357,000		3,844,000	[1],[2]	$ 4,277,000		$ 2,137,000		$ 6,450,000		9,366,000	16,708,000	$ 6,588,000
SMART Temps
Business Acquisition [Line Items]
Cash paid at closing	$ 28,754,000
Cash acquired	500,000
Goodwill	$ 18,816,000
Weighted average useful life of acquired intangibles	5 years 10 months 24 days
Revenues																				5,500,000
Net income (loss)																				(1,200,000)
Acquisition costs																				800,000
FreshTemp
Business Acquisition [Line Items]
Cash paid at closing		$ 1,697,000
Earn-out payment maximum		2,300,000
Goodwill		$ 2,650,000
Weighted average useful life of acquired intangibles		5 years 9 months 18 days
Revenues																				500,000
Acquisition costs																				60,000
Bluenica Corporation
Business Acquisition [Line Items]
Cash paid at closing			$ 2,900,000
Earn-out payment maximum			$ 11,600,000
Earn-out payment installment period			4 years
Goodwill			$ 11,000,000
Purchased and Core Technology | SMART Temps
Business Acquisition [Line Items]
Estimated useful life of finite lived intangibles	5 years
Purchased and Core Technology | FreshTemp
Business Acquisition [Line Items]
Estimated useful life of finite lived intangibles		5 years
Customer Relationships | SMART Temps
Business Acquisition [Line Items]
Estimated useful life of finite lived intangibles	7 years
Customer Relationships | FreshTemp
Business Acquisition [Line Items]
Estimated useful life of finite lived intangibles		7 years
Trademarks and Trade Names | SMART Temps
Business Acquisition [Line Items]
Estimated useful life of finite lived intangibles	5 years
Noncompete Agreements | SMART Temps
Business Acquisition [Line Items]
Estimated useful life of finite lived intangibles	5 years
Earn-out payments | SMART Temps
Business Acquisition [Line Items]
Earn-out payment maximum	$ 7,200,000
Additional earn-out payment | Bluenica Corporation
Business Acquisition [Line Items]
Earn-out payment maximum			3,500,000
Fair Value, Measurements, Recurring | Contingent Consideration | Estimate of Fair Value Measurement
Business Acquisition [Line Items]
Contingent consideration fair value				6,388,000								$ 9,960,000								6,388,000	$ 9,960,000
Fair Value, Measurements, Recurring | Contingent Consideration | Estimate of Fair Value Measurement | SMART Temps
Business Acquisition [Line Items]
Contingent consideration fair value	$ 10,000			0																0
Fair Value, Measurements, Recurring | Contingent Consideration | Estimate of Fair Value Measurement | FreshTemp
Business Acquisition [Line Items]
Contingent consideration fair value		$ 1,300,000		400,000																400,000
Fair Value, Measurements, Recurring | Contingent Consideration | Estimate of Fair Value Measurement | Bluenica Corporation
Business Acquisition [Line Items]
Contingent consideration fair value			$ 10,400,000	$ 6,000,000																$ 6,000,000

[1] During fiscal 2017 and 2016, we recorded net tax benefits of $1.0 million and $1.5 million, respectively. We recorded a benefit of $0.1 million in the first quarter of fiscal 2017 resulting from the reversal of income tax reserves due to the 18. QUARTERLY FINANCIAL DATA (UNAUDITED)(CONTINUED)expiration of the statutes of limitation from various U.S. and foreign tax jurisdictions. In the third quarter of fiscal 2017, we recorded a tax benefit of $0.7 million from the reversal of income tax reserves due to the expiration of the statutes of limitation from various U.S. and foreign tax jurisdictions. In the fourth quarter of fiscal 2017, we recorded a net tax benefit of $0.2 million, primarily from the reversal of income tax reserves due to the expiration of the statutes of limitation from various U.S. and foreign tax jurisdictions and state and foreign prior year true-up provision to return. We recorded a benefit of $0.7 million in the first quarter of fiscal 2016 resulting from the reinstatement of the research and development tax credit for calendar year 2015, reversal of income tax reserves due to the expiration of the statutes of limitation from various U.S. and foreign tax jurisdictions and reversal of tax reserves due to the resolution of tax audits. In the third quarter of fiscal 2016, we recorded a tax benefit of $0.5 million primarily due to the filing of an amended income tax return resulting in a domestic refund related to qualified manufacturing activities. In the fourth quarter of fiscal 2016, we recorded a net tax benefit of $0.2 million, primarily due to the filing of an additional amended income tax return resulting in an additional domestic refund related to qualified manufacturing activities, partially offset by an adjustment of the state rate on net deferred tax assets.

[2] For continuing operations, we recorded business restructuring charges of $2.5 million ($1.6 million after tax) in the third quarter of fiscal 2017, $0.7 million ($0.4 million after tax) in the first quarter of fiscal 2016 and $0.1 million ($0.1 million after tax) in the second quarter of fiscal 2016.