Digi International (DGII) 10-Q 4 May 15 2015 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	DIGI INTERNATIONAL INC.
Entity Central Index Key	854775
Current Fiscal Year End Date	-21
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		24,926,816

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Revenue:
Hardware product revenue	$48,108	$40,560	$93,041	$82,549
Service revenue	5,043	5,322	8,833	10,655
Total revenue	53,151	45,882	101,874	93,204
Cost of sales:
Cost of hardware product	25,498	20,012	48,610	40,275
Cost of service	3,575	4,090	7,264	8,241
Total cost of sales	29,073	24,102	55,874	48,516
Gross profit	24,078	21,780	46,000	44,688
Operating expenses:
Sales and marketing	10,299	10,399	21,091	20,618
Research and development	7,779	7,411	15,341	14,668
General and administrative	4,540	4,619	9,728	9,342
Restructuring charges, net	518	0	518	81
Total operating expenses	23,136	22,429	46,678	44,709
Operating income (loss)	942	-649	-678	-21
Other income, net:
Interest income, net	54	49	92	92
Other income, net	1,324	21	1,712	114
Total other income, net	1,378	70	1,804	206
Income (loss) before income taxes	2,320	-579	1,126	185
Income tax provision (benefit)	874	-1,317	19	-1,241
Net income	$1,446	$738	$1,107	$1,426
Net income per common share:
Basic (USD per share)	$0.06	$0.03	$0.05	$0.06
Net income per common share, diluted (USD per share)	$0.06	$0.03	$0.04	$0.05
Weighted average common shares:
Basic (shares)	24,492	25,644	24,319	25,680
Diluted (shares)	25,273	26,144	24,816	26,189

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) (USD $)	3 Months Ended			6 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014	Mar. 31, 2015		Mar. 31, 2014
Net income	$1,446		$738	$1,107		$1,426
Foreign currency translation adjustment	-3,356		-181	-5,729		162
Change in net unrealized gain (loss) on investments	23		26	-6		64
Less income tax (provision) benefit	-9		-10	2		-25
Reclassification of realized loss on investments included in net income	-1	[1]	0	-1	[1]	0
Other comprehensive (loss) income, net of tax	-3,341		-165	-5,732		201
Comprehensive (loss) income	($1,895)		$573	($4,625)		$1,627
[1]	Recorded in Other income, net on our Condensed Consolidated Statement of Operations.

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Mar. 31, 2015	Sep. 30, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$45,657	$47,490
Marketable securities	39,220	32,898
Accounts receivable, net	28,615	28,576
Inventories	33,881	31,247
Deferred tax assets	3,388	3,221
Other	4,877	4,249
Total current assets	155,638	147,681
Marketable securities, long-term	7,550	11,541
Property, equipment and improvements, net	14,617	13,231
Identifiable intangible assets, net	5,348	6,785
Goodwill	101,742	103,398
Deferred tax assets	4,947	7,383
Other	320	440
Total assets	290,162	290,459
Current liabilities:
Accounts payable	11,375	10,451
Accrued compensation	7,677	8,133
Other	3,421	3,170
Total current liabilities	22,473	21,754
Income taxes payable	1,893	2,724
Deferred tax liabilities	182	272
Other noncurrent liabilities	481	411
Total liabilities	25,029	25,161
Contingencies (see Note 9)
Stockholders' equity:
Preferred stock, $.01 par value; 2,000,000 shares authorized; none issued and outstanding	0	0
Common stock, $.01 par value; 60,000,000 shares authorized; 31,462,480 and 30,703,895 shares issued	315	307
Additional paid-in capital	224,873	218,689
Retained earnings	118,923	117,816
Accumulated other comprehensive loss	-24,009	-18,277
Treasury stock, at cost, 6,538,789 and 6,313,937 shares	-54,969	-53,237
Total stockholders' equity	265,133	265,298
Total liabilities and stockholders' equity	$290,162	$290,459

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2015	Sep. 30, 2014
Statement of Financial Position [Abstract]
Preferred stock, par value (USD per share)	$0.01	$0.01
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (USD per share)	$0.01	$0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	31,462,480	30,703,895
Treasury stock, shares	6,538,789	6,313,937

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Operating activities:
Net income	$1,107	$1,426
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property, equipment and improvements	1,445	1,828
Amortization of identifiable intangible assets	1,537	1,891
Stock-based compensation	2,222	2,070
Excess tax benefits from stock-based compensation	0	-44
Deferred income tax provision (benefit)	2,212	-1,065
Gain on insurance settlement related to property and equipment	-989	0
Bad debt/product return provision	518	-151
Inventory obsolescence	476	409
Restructuring charges, net	518	81
Other	-27	46
Changes in operating assets and liabilities	-7,459	-9,681
Net cash provided by (used in) operating activities	1,560	-3,190
Investing activities:
Purchase of marketable securities	-22,099	-5,157
Proceeds from maturities of marketable securities	19,763	13,778
Proceeds from insurance settlement related to property and equipment	1,014	0
Proceeds from sale of property and equipment	45	0
Purchase of property, equipment, improvements and certain other intangible assets	-3,035	-1,921
Net cash (used in) provided by investing activities	-4,312	6,700
Financing activities:
Excess tax benefits from stock-based compensation	0	44
Proceeds from stock option plan transactions	6,006	3,209
Proceeds from employee stock purchase plan transactions	505	561
Purchases of common stock	-2,339	-5,416
Net cash provided by (used in) financing activities	4,172	-1,602
Effect of exchange rate changes on cash and cash equivalents	-3,253	329
Net (decrease) increase in cash and cash equivalents	-1,833	2,237
Cash and cash equivalents, beginning of period	47,490	41,320
Cash and cash equivalents, end of period	$45,657	$43,557

Basis_of_Presentation_of_Unaud

Basis of Presentation of Unaudited Interim Condensed Consolidated Financial Statements and Significant Accounting Policies	6 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
BASIS OF PRESENTATION OF UNAUDITED INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AND SIGNIFICANTACCOUNTING POLICIES	BASIS OF PRESENTATION OF UNAUDITED INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AND SIGNIFICANT ACCOUNTING POLICIES
	Basis of Presentation
	The interim unaudited condensed consolidated financial statements included in this Form 10-Q have been prepared by Digi International Inc. (the “Company,” “Digi,” “we,” “our,” or “us”) pursuant to the rules and regulations of the United States Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures, normally included in consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”), have been condensed or omitted pursuant to such rules and regulations. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes thereto, including (but not limited to) the summary of significant accounting policies, presented in our Annual Report on Form 10-K for the year ended September 30, 2014 as filed with the SEC (“2014 Financial Statements”).
	The condensed consolidated financial statements presented herein reflect, in the opinion of management, all adjustments which consist only of normal, recurring adjustments necessary for a fair statement of the condensed consolidated balance sheets and condensed consolidated statements of operations, comprehensive income and cash flows for the periods presented. The condensed consolidated results of operations for any interim period are not necessarily indicative of results for the full year. The year-end condensed consolidated balance sheet data were derived from our 2014 Financial Statements, but do not include all disclosures required by U.S. GAAP.
	Recently Issued Accounting Pronouncements
	Not Yet Adopted
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-09, “Revenue from Contracts with Customers.” This guidance provides a five-step analysis in determining when and how revenue is recognized so that an entity will recognize revenue when it transfers promised goods or services to customers in an amount that reflects what it expects in exchange for the goods and services. It also requires more detailed disclosures to enable users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. This guidance is effective for fiscal years (and interim reporting periods within those years) beginning after December 15, 2016. We expect to adopt this guidance beginning with our fiscal quarter ending December 31, 2017. We are evaluating the impact that the adoption will have on our consolidated financial statements.

Earnings_Per_Share

Earnings Per Share	6 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE
	Basic net income per common share is calculated based on the weighted average number of common shares outstanding during the period. Diluted net income per common share is computed by dividing net income by the weighted average number of common shares and potentially dilutive common shares outstanding during the period. Potentially dilutive common shares result from dilutive common stock options and restricted stock units.
	The following table is a reconciliation of the numerators and denominators in the net income per common share calculations (in thousands, except per common share data):
		Three months ended March 31,				Six months ended March 31,
		2015		2014		2015		2014
	Numerator:
	Net income	$	1,446	$	738	$	1,107	$	1,426
	Denominator:
	Denominator for basic net income per common share — weighted average shares outstanding	24,492		25,644		24,319		25,680
	Effect of dilutive securities:
	Stock options and restricted stock units	781		500		497		509
	Denominator for diluted net income per common share — adjusted weighted average shares	25,273		26,144		24,816		26,189
	Net income per common share, basic	$	0.06	$	0.03	$	0.05	$	0.06
	Net income per common share, diluted	$	0.06	$	0.03	$	0.04	$	0.05
	For the three months ended March 31, 2015 and 2014, there were 2,366,812 and 3,347,082 potentially dilutive shares, respectively, and for the six months ended March 31, 2015 and 2014, there were 3,496,463 and 2,627,905 potentially dilutive shares, respectively, related to stock options to purchase common shares that were not included in the above computation of diluted earnings per common share. This is because the options’ exercise prices were greater than the average market price of our common shares.

Selected_Balance_Sheet_Data

Selected Balance Sheet Data	6 Months Ended
	Mar. 31, 2015
Selected Balance Sheet Data [Abstract]
SELECTED BALANCE SHEET DATA	SELECTED BALANCE SHEET DATA
	(in thousands)
		March 31, 2015		September 30, 2014
	Accounts receivable, net:
	Accounts receivable	$	28,937	$	28,943
	Less allowance for doubtful accounts	322		367
	Accounts receivable, net	$	28,615	$	28,576
	Inventories:
	Raw materials	$	27,773	$	26,402
	Work in process	789		315
	Finished goods	5,319		4,530
	Inventories	$	33,881	$	31,247
	Inventories are stated at the lower of cost or market value, with cost determined using the first-in, first-out method.

Marketable_Securities

Marketable Securities	6 Months Ended
	Mar. 31, 2015
Marketable Securities [Abstract]
MARKETABLE SECURITIES	MARKETABLE SECURITIES
	Our marketable securities consist of certificates of deposit, corporate bonds and commercial paper. We analyze our available-for-sale marketable securities for impairment on an ongoing basis. When we perform this analysis, we consider factors such as the length of time and extent to which the securities have been in an unrealized loss position and the trend of any unrealized losses. We also consider whether an unrealized loss is a temporary loss or an other-than-temporary loss based on factors such as: (a) whether we have the intent to sell the security, (b) whether it is more likely than not that we will be required to sell the security before its anticipated recovery, or (c) permanent impairment due to bankruptcy or insolvency.
	4. MARKETABLE SECURITIES (CONTINUED)
	In order to estimate the fair value for each security in our investment portfolio, we obtain quoted market prices and trading activity for each security where available. We obtain relevant information from our investment advisor and, if warranted, also may review the financial solvency of certain security issuers. As of March 31, 2015, 40 of our 68 securities that we held were trading below our amortized cost basis. We determined each decline in value to be temporary based upon the above described factors. We expect to realize the fair value of these securities, plus accrued interest, either at the time of maturity or when the security is sold. All of our current holdings are classified as available-for-sale marketable securities and are recorded at fair value on our consolidated balance sheet with the unrealized gains and losses recorded in accumulated other comprehensive loss. All of our current marketable securities will mature in less than one year and our non-current marketable securities will mature in less than three years. During the three months ended March 31, 2015 and 2014, we received proceeds from our available-for-sale marketable securities of $10.4 million and $6.7 million, respectively. During the six months ended March 31, 2015 and 2014, we received proceeds from our available-for-sale marketable securities of $19.8 million and $13.8 million, respectively.
	At March 31, 2015 our marketable securities were (in thousands):
		Amortized		Unrealized			Unrealized			Fair Value (1)
		Cost (1)		Gains			Losses
	Current marketable securities:
	Corporate bonds	$	30,255	$	—		$	(41	)	$	30,214
	Commercial paper	2,000		—			—			2,000
	Certificates of deposit	7,002		7			(3		)	7,006
	Current marketable securities	39,257		7			(44		)	39,220
	Non-current marketable securities:
	Corporate bonds	3,048		—			(10		)	3,038
	Certificates of deposit	4,502		12			(2		)	4,512
	Non-current marketable securities	7,550		12			(12		)	7,550
	Total marketable securities	$	46,807	$	19		$	(56	)	$	46,770
	-1	Included in amortized cost and fair value is purchased and accrued interest of $155.
	At September 30, 2014 our marketable securities were (in thousands):
		Amortized		Unrealized			Unrealized			Fair Value (1)
		Cost (1)		Gains			Losses
	Current marketable securities:
	Corporate bonds	$	24,668	$	1		$	(22	)	$	24,647
	Commercial paper	3,998		—			(1		)	3,997
	Certificates of deposit	4,252		2			—			4,254
	Current marketable securities	32,918		3			(23		)	32,898
	Non-current marketable securities:
	Corporate bonds	2,051		—			(4		)	2,047
	Certificates of deposit	9,502		14			(22		)	9,494
	Non-current marketable securities	11,553		14			(26		)	11,541
	Total marketable securities	$	44,471	$	17		$	(49	)	$	44,439
	-1	Included in amortized cost and fair value is purchased and accrued interest of $213.
	4. MARKETABLE SECURITIES (CONTINUED)
	The following tables show the fair values and gross unrealized losses of our available-for-sale marketable securities that have been in a continuous unrealized loss position deemed to be temporary, aggregated by investment category (in thousands):
		March 31, 2015
		Less than 12 Months					More than 12 Months
		Fair Value		Unrealized Losses			Fair Value			Unrealized Losses
	Corporate bonds	$	33,101	$	(51	)	$	—		$	—
	Certificates of deposit	3,995		(5		)	—			—
	Total	$	37,096	$	(56	)	$	—		$	—
		September 30, 2014
		Less than 12 Months					More than 12 Months
		Fair Value		Unrealized Losses			Fair Value			Unrealized Losses
	Corporate bonds	$	23,475	$	(26	)	$	—		$	—
	Commercial paper	3,998		(1		)	—			—
	Certificates of deposit	2,980		(20		)	748			(2		)
	Total	$	30,453	$	(47	)	$	748		$	(2	)

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS
	Fair value is defined as the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. This standard also establishes a hierarchy for inputs used in measuring fair value. This standard maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs market participants would use in valuing the asset or liability based on market data obtained from independent sources. Unobservable inputs are inputs that reflect our assumptions about the factors market participants would use in valuing the asset or liability based upon the best information available in the circumstances.
	The categorization of financial assets and liabilities within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The hierarchy is broken down into three levels. Level 1 inputs are quoted prices in active markets for identical assets or liabilities. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable for the asset or liability and their fair values are determined using pricing models, discounted cash flow methodologies or similar techniques and at least one significant model assumption or input is unobservable. Level 3 may also include certain investment securities for which there is limited market activity or a decrease in the observability of market pricing for the investments, such that the determination of fair value requires significant judgment or estimation.
	Fair value is applied to financial assets such as our marketable securities, which are classified and accounted for as available-for-sale. These items are stated at fair value at each reporting period using the above guidance.
	5. FAIR VALUE MEASUREMENTS (CONTINUED)
	The following tables provide information by level for financial assets that are measured at fair value on a recurring basis (in thousands):
		Total carrying		Fair Value Measurements Using
		value at		Inputs Considered as
		31-Mar-15		Level 1		Level 2		Level 3
	Cash equivalents:
	Money market	$	13,879	$	13,879	$	—	$	—
	Available-for-sale marketable securities:
	Corporate bonds	33,252		—		33,252		—
	Commercial paper	2,000		—		2,000		—
	Certificates of deposit	11,518		—		11,518		—
	Total cash equivalents and marketable securities	$	60,649	$	13,879	$	46,770	$	—
	measured at fair value
		Total carrying		Fair Value Measurements Using
		value at		Inputs Considered as
		30-Sep-14		Level 1		Level 2		Level 3
	Cash equivalents:
	Money market	$	19,630	$	19,630	$	—	$	—
	Available-for-sale marketable securities:
	Corporate bonds	26,694		—		26,694		—
	Commercial paper	3,997		—		3,997		—
	Certificates of deposit	13,748		—		13,748		—
	Total cash equivalents and marketable securities	$	64,069	$	19,630	$	44,439	$	—
	measured at fair value
	Our money market funds, which have been determined to be cash equivalents, are measured at fair value using quoted market prices in active markets for identical assets and are therefore classified as Level 1 assets. We value our Level 2 assets using inputs that are based on market indices of similar assets within an active market. There were no transfers into or out of our Level 2 financial assets during the six months ended March 31, 2015.
	We did not carry, purchase or sell any Level 3 financial assets during the six months ended March 31, 2015.
	The use of different assumptions, applying different judgment to matters that inherently are subjective and changes in future market conditions could result in different estimates of fair value of our securities, currently and in the future. If market conditions deteriorate, we may incur impairment charges for securities in our investment portfolio.

Goodwill_and_Other_Identifiabl

Goodwill and Other Identifiable Intangible Assets, Net	6 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS, NET	GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS, NET
	Amortizable identifiable intangible assets were (in thousands):
		March 31, 2015								September 30, 2014
		Gross			Accum.			Net		Gross		Accum.			Net
		carrying			amort.					carrying		amort.
		amount								amount
	Purchased and core technology	$	45,298		$	(44,949	)	$	349	$	45,952	$	(45,162	)	$	790
	License agreements	—			—			—		2,440		(2,440		)	—
	Patents and trademarks	11,830			(10,302		)	1,528		11,667		(9,799		)	1,868
	Customer relationships	18,371			(15,468		)	2,903		18,894		(15,445		)	3,449
	Non-compete agreements	1,100			(532		)	568		1,100		(422		)	678
	Order backlog	—			—			—		360		(360		)	—
	Total	$	76,599		$	(71,251	)	$	5,348	$	80,413	$	(73,628	)	$	6,785
	Amortization expense was $0.8 million and $0.9 million for the three month periods ended March 31, 2015 and 2014, respectively. Amortization expense was $1.5 million and $1.9 million for the six month periods ended March 31, 2015 and 2014, respectively. Amortization expense is recorded on our consolidated statements of operations within cost of sales and in general and administrative expense.
	Estimated amortization expense related to identifiable intangible assets for the remainder of fiscal 2015 and the five succeeding fiscal years is (in thousands):
	2015 six months	$	1,378
	2016	1,927
	2017	901
	2018	482
	2019	438
	2020	168
	The changes in the carrying amount of goodwill are (in thousands):
		Six months ended
		March 31,
		2015			2014
	Beginning balance, October 1	$	103,398		$	103,569
	Foreign currency translation adjustment	(1,656		)	476
	Ending balance, March 31	$	101,742		$	104,045
	Goodwill is tested for impairment on an annual basis as of June 30, or more frequently if events or circumstances occur which could indicate impairment. The calculation of goodwill impairment requires us to make assumptions about the fair value of our one reporting unit, which historically has been approximated by using our market capitalization plus a control premium. Control premium assumptions require judgment and actual results may differ from assumed or estimated amounts.
	Our test for potential goodwill impairment is a two-step approach. We estimate the fair value for our one reporting unit by comparing its fair value (market capitalization plus control premium) to our carrying value. If the carrying value of the reporting unit exceeds its estimated fair value, the second step of the goodwill impairment analysis requires us to measure the amount of the impairment loss. An impairment loss is calculated by comparing the implied fair value of the goodwill to its carrying amount. To calculate the implied fair value of goodwill, the fair value of the reporting unit’s assets and liabilities, excluding goodwill, is estimated. The excess of the fair value of the reporting unit over the amount assigned to its assets and liabilities, excluding goodwill, is the implied fair value of the reporting unit’s goodwill.
	At June 30, 2014, our market capitalization was $235.8 million compared to our carrying value of $273.0 million. Our market capitalization plus our estimated control premium of 35% (discussed in the paragraphs below) resulted in a fair value in excess
	6. GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS, NET (CONTINUED)
	of our carrying value by a margin of 17%. We concluded that no impairment was indicated and we were not required to complete the second step of the goodwill impairment analysis. No goodwill impairment charges were recorded.
	In June 2014, we performed a control premium study to determine the appropriate control premium to include in the calculation of fair value. We used a third party valuation firm to assist us in performing this control premium analysis. In order to estimate the range of control premiums appropriate for us, the following three methodologies were used: (1) analysis of individual transactions within our industry; (2) analysis of industry-wide data, and (3) analysis of global transaction data. Individual transactions in the Communication Equipment or Technology Hardware, Storage and Peripherals industries were used to find transactions of target companies that operated in similar markets and shared similar operating characteristics with us.  Transaction screening criteria included selection of transactions with the following characteristics:
	•At least 50 percent of a target company’s equity sought by an acquirer,
	•Target company considered operating (not in bankruptcy),
	•Target company had publicly traded stock outstanding at the transaction date, and
	•Transactions announced between June 30, 2009 and the valuation date.
	In analyzing industry-wide data, transactions in the following three industries were identified that encompassed the products offered by us: Office Equipment and Computer Hardware, Communications, and Computer, Supplies and Services.  Finally, control premiums were considered for both domestic and international transactions. The control premium analysis resulted in a range of control premium of 30 percent to 40 percent. We reviewed the data and concluded that a 35 percent control premium best represented the amount an investor would likely pay, over and above market capitalization, in order to obtain a controlling interest given the economic conditions at that time.
	If our stock price or control premium declines, the first step of our goodwill impairment analysis may fail. We have identified factors that could result in additional interim goodwill impairment testing. For example, we would perform the second step of the impairment testing if our stock price fell below certain thresholds for a significant period of time, or if our control premium significantly decreased. Events or circumstances may occur that could negatively impact our stock price, including changes in our anticipated revenues and profits and our ability to execute on our strategies. In addition, our control premium could decline due to changes in economic conditions in the technology industry, in the financial markets or more generally. An impairment could have a material effect on our consolidated balance sheet and results of operations. We have had no goodwill impairment losses since the adoption of Accounting Standards Codification (ASC) 350, Intangibles-Goodwill and Others, in fiscal 2003.

Income_Taxes

Income Taxes	6 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES
	Income tax provision was minimal for the six month period ended March 31, 2015. Tax benefits specific to the six months ended March 31, 2015 primarily include $0.5 million resulting from the reinstatement of the research and development tax credit for calendar year 2014 and the reversal of tax reserves due to the expiration of statutes of limitation from U.S. and foreign tax jurisdictions. For the six month period ended March 31, 2015, our effective tax rates before items specific to the period were more than the U.S. statutory rate due primarily to mix of income between jurisdictions having lower statutory tax rates than the U.S.
	Income tax benefit was $1.2 million for the six month period ended March 31, 2014. Tax benefits specific to the period of $1.3 million related to the re-measurement and reversal of certain income tax reserves as a result of the conclusion in March 2014 of a federal income tax audit for fiscal 2012 and a reversal of reserves due to the expiration of statutes of limitation from U.S. and foreign tax jurisdictions. For the six month period ended March 31, 2014, our effective tax rates before items specific to the period were more than the statutory rate primarily due to reserves for unrecognized tax benefits and state income taxes in excess of domestic tax benefits.
	Our effective tax rate will vary based on a variety of factors, including overall profitability, the geographical mix of income before taxes and related statutory tax rate in each jurisdiction, and tax benefits specific to the period, such as settlements of audits. We expect that we may record other benefits or expenses in the future that are specific to a particular quarter, based on expiration of statutes of limitation, the completion of tax audits, or legislation that is enacted for both U.S. and foreign jurisdictions.
	7. INCOME TAXES (CONTINUED)
	A reconciliation of the beginning and ending amount of unrecognized tax benefits is (in thousands):
	Unrecognized tax benefits as of September 30, 2014	$	2,301
	Increases related to:
	Prior year income tax positions	50
	Decreases related to:
	Prior year income tax positions	(255		)
	Settlements	(74		)
	Expiration of statute of limitations	(139		)
	Unrecognized tax benefits as of March 31, 2015	$	1,883
	The total amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate is $1.9 million. We expect the total amounts of unrecognized tax benefits will decrease by approximately $0.6 million over the next 12 months.
	Of the $1.9 million of unrecognized tax benefits, $1.5 million is included in non-current income taxes payable and $0.4 million is included with non-current deferred tax assets on the condensed consolidated balance sheet at March 31, 2015.
	We recognize interest and penalties related to income tax matters in income tax expense. During both the six month periods ended March 31, 2015 and 2014, there were insignificant amounts of interest and penalties related to income tax matters in income tax expense. Accrued interest and penalties related to unrecognized tax benefits was $0.4 million at both March 31, 2015 and September 30, 2014. Our non-current income taxes payable on our condensed consolidated balance sheet includes accrued interest and penalties in addition to the unrecognized tax benefits of $1.5 million at March 31, 2015.
	At March 31, 2015, we had approximately $26.0 million of accumulated undistributed foreign earnings, for which we have not accrued additional U.S. tax. Our policy is to reinvest earnings of our foreign subsidiaries indefinitely to fund current operations and provide for future international expansion opportunities, and only to repatriate earnings to the extent that U.S. taxes have already been recorded. Although we have no current need to do so, if we change our assertion that we do not intend to repatriate additional undistributed foreign earnings for cash requirements in the United States, we would have to accrue applicable taxes. The amount of any taxes and the application of any tax credits would be determined based on the income tax laws at the time of such repatriation. Under current tax laws, we estimate the unrecognized deferred tax liability to be in the range of $0.5 million to $1.5 million.
	We operate in multiple tax jurisdictions, including the U.S. and other jurisdictions outside of the U.S. Accordingly, we must determine the appropriate allocation of income to each of these jurisdictions. This determination requires us to make several estimates and assumptions. Tax audits associated with the allocation of this income, and other complex issues, may require an extended period of time to resolve and may result in adjustments to our income tax balances in those years that are material to our consolidated balance sheet and results of operations. We are no longer subject to income tax examination for tax years prior to fiscal 2013, except for certain refund claims applicable to fiscal 2009, in the case of U.S. federal tax authorities and prior to fiscal 2009 for non-U.S. income tax authorities. For state taxing authorities, most notably in California and Texas, we are no longer subject to income tax examination for tax years generally before fiscal 2010, and for Minnesota for tax years prior to fiscal 2013.

Product_Warranty_Obligation

Product Warranty Obligation	6 Months Ended
	Mar. 31, 2015
Product Warranties Disclosures [Abstract]
PRODUCT WARRANTY OBLIGATION	PRODUCT WARRANTY OBLIGATION
	In general, we warrant our products to be free from defects in material and workmanship under normal use and service. The warranty periods generally range from one to five years. We typically have the option to either repair or replace products we deem defective with regard to material or workmanship. Estimated warranty costs are accrued in the period that the related revenue is recognized based upon an estimated average per unit repair or replacement cost applied to the estimated number of units under warranty. These estimates are based upon historical warranty incidents and are evaluated on an ongoing basis to ensure the adequacy of the warranty accrual.
	8. PRODUCT WARRANTY OBLIGATION (CONTINUED)
	The following table summarizes the activity associated with the product warranty accrual (in thousands) and is included on our Condensed Consolidated Balance Sheets within current liabilities:
		Balance at		Warranties		Settlements			Balance at
	Period	1-Jan		issued		made			March 31
	Three months ended March 31, 2015	$	950	$	206	$	(233	)	$	923
	Three months ended March 31, 2014	$	1,013	$	176	$	(217	)	$	972
		Balance at		Warranties		Settlements			Balance at
	Period	1-Oct		issued		made			March 31
	Six months ended March 31, 2015	$	862	$	497	$	(436	)	$	923
	Six months ended March 31, 2014	$	1,063	$	322	$	(413	)	$	972
	We are not responsible for, and do not warrant that, custom software versions, created by original equipment manufacturer (OEM) customers based upon our software source code, will function in a particular way, will conform to any specifications or are fit for any particular purpose. Further, we do not indemnify these customers from any third-party liability as it relates to or arises from any customization or modifications made by the OEM customer.

Contingencies

Contingencies	6 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
CONTINGENCIES	CONTINGENCIES
	In the normal course of business, we are subject to various claims and litigation. There can be no assurance that any claims by third parties, if proven to have merit, will not materially adversely affect our business, liquidity or financial condition.

StockBased_Compensation

Stock-Based Compensation	6 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION
	Stock-based awards were granted under the 2014 Omnibus Incentive Plan (the “2014 Plan”) during the six months ended March 31, 2015. During the six months ended March 31, 2014, stock-based awards were granted under the 2013 Omnibus Incentive Plan (which expired during the second quarter of fiscal 2014) and the 2014 Plan. Upon stockholder approval of the 2014 Plan, we ceased granting awards under any prior plan. The authority to grant options under the 2014 Plan and set other terms and conditions rests with the Compensation Committee of the Board of Directors.
	The 2014 Plan authorizes the issuance of up to 2,250,000 common shares in connection with awards of stock options, stock appreciation rights, restricted stock, restricted stock units, performance-based full value awards or other stock-based awards. Eligible participants include our employees, our affiliates, non-employee directors of our Company and any consultant or advisor who is a natural person and provides services to us or our affiliates. Options that have been granted under the 2014 Plan typically vest over a four year service period and will expire if unexercised after eight years from the date of grant. Restricted stock awards (RSU's) that have been granted to Directors typically vest in one year. RSU's that have been granted to executives and employees typically vest in November over a four-year period. Awards may be granted under the 2014 Plan until January 27, 2024. Options under the 2014 Plan can be granted as either incentive stock options (ISOs) or non-statutory stock options (NSOs). The exercise price of options and the grant date price of restricted stock shall be determined by our Compensation Committee but shall not be less than the fair market value of our common stock based on the closing price on the date of grant. Upon exercise, we issue new shares of stock. Our equity plans and corresponding forms of award agreements generally have provisions allowing employees to elect to satisfy tax withholding obligations through the delivery of shares or having us retain a portion of shares issuable under the award. As of March 31, 2015, there were approximately 1,492,183 shares available for future grants under the 2014 Plan.
	Cash received from the exercise of stock options was $6.0 million during the six months ended March 31, 2015 and $3.2 million during the six months ended March 31, 2014. There were no excess tax benefits from stock-based compensation for the six months ended March 31, 2015. The excess tax benefits from stock-based compensation were minimal during the six months ended March 31, 2014.
	We sponsor an Employee Stock Purchase Plan (the Purchase Plan), covering all domestic employees with at least 90 days of continuous service and who are customarily employed at least 20 hours per week. The Purchase Plan allows eligible participants the right to purchase common stock on a quarterly basis at the lower of 85% of the market price at the beginning or end of each three-month offering period. Employee contributions to the Purchase Plan were $0.5 million during the six months
	10. STOCK-BASED COMPENSATION (CONTINUED)
	ended March 31, 2015 and $0.6 million during the six months ended March 31, 2014, respectively. Pursuant to the Purchase Plan, 72,306 and 65,832 common shares were issued to employees during the six months ended March 31, 2015 and 2014, respectively. Shares are issued under the Purchase Plan from treasury stock. As of March 31, 2015, 669,072 common shares were available for future issuances under the Purchase Plan.
	Stock-based compensation expense is included in the consolidated results of operations as follows (in thousands):
		Three months ended March 31,							Six months ended March 31,
		2015				2014			2015			2014
	Cost of sales	$	83			$	82		$	189		$	150
	Sales and marketing	306				282			649			568
	Research and development	196				177			388			383
	General and administrative	453				506			996			969
	Stock-based compensation before income taxes	1,038				1,047			2,222			2,070
	Income tax benefit	(361		)		(355		)	(775		)	(703		)
	Stock-based compensation after income taxes	$	677			$	692		$	1,447		$	1,367
	Stock-based compensation cost capitalized as part of inventory was immaterial as of March 31, 2015 and September 30, 2014.
	The following table summarizes our stock option activity (in thousands, except per common share amounts):
			Options Outstanding			Weighted Average Exercised Price		Weighted Average Contractual Term (in years)	Aggregate Intrinsic Value (1)
	Balance at September 30, 2014		6,029			$10.61
	Granted		704			7.82
	Exercised		(677	)		8.87
	Forfeited / Canceled		(1,168	)		11.58
	Balance at March 31, 2015		4,888			$10.22		5.3	$	3,263
	Exercisable at March 31, 2015		3,482			$10.70		4.5	$	1,603
	(1) The aggregate intrinsic value represents the total pre-tax intrinsic value, based on our closing stock price of $9.98 as of March 31, 2015, which would have been received by the option holders had all option holders exercised their options as of that date. The intrinsic value of an option is the amount by which the fair value of the underlying stock exceeds its exercise price.
	The total intrinsic value of all options exercised during the six months ended March 31, 2015 was $0.8 million and during the six months ended March 31, 2014 was $0.5 million.
	The table below shows the weighted average fair value, which was determined based upon the fair value of each option on the grant date utilizing the Black-Scholes option-pricing model and the related assumptions:
		Six months ended March 31,
		2015				2014
	Fair value of options granted (in thousands)	$	2,046			$	3,995
	Weighted average per option grant date fair value	$	2.91			$	4.44
	Assumptions used for option grants:
	Risk free interest rate	1.77% - 1.85%				1.76% - 1.91%
	Expected term	6.00 years				6.00 years
	Expected volatility	35% - 36%				40%
	Weighted average volatility	35%				40%
	Expected dividend yield	0				0
	10. STOCK-BASED COMPENSATION (CONTINUED)
	The fair value of each option award granted during the periods presented was estimated using the Black-Scholes option valuation model that uses the assumptions noted in the table above. Expected volatilities are based on the historical volatility of our stock. We use historical data to estimate option exercise and employee termination information within the valuation model; separate groups of grantees that have similar historical exercise behaviors are considered separately for valuation purposes. The expected term of options granted is derived from the vesting period and historical information and represents the period of time that options granted are expected to be outstanding. The risk-free rate used is the zero-coupon U.S. Treasury bond rate in effect at the time of the grant whose maturity equals the expected term of the option.
	We use historical data to estimate pre-vesting forfeiture rates. The pre-vesting forfeiture rate used during the six months ended March 31, 2015 was 6.0%. As of March 31, 2015 the total unrecognized compensation cost related to non-vested stock-based compensation arrangements, net of expected forfeitures, was $4.4 million and the related weighted average period over which it is expected to be recognized is approximately 3.0 years.
	A summary of our non-vested restricted stock units as of March 31, 2015 and changes during the six months then ended is presented below (in thousands, except per common share amounts):
		Number of Awards			Weighted Average Grant Date Fair Value
	Nonvested at September 30, 2014	171			$	9.35
	Granted	432			$	7.96
	Vested	(81	)		$	9.6
	Canceled	(29	)		$	7.91
	Nonvested at December 31, 2014	493			$	8.17
	As of March 31, 2015, the total unrecognized compensation cost related to non-vested restricted stock units was $3.4 million and the related weighted average period over which it is expected to be recognized is approximately 1.7 years.

Common_Stock_Repurchase

Common Stock Repurchase	6 Months Ended
	Mar. 31, 2015
Common Stock Repurchase [Abstract]
COMMON STOCK REPURCHASE	COMMON STOCK REPURCHASE
	On October 28, 2014, our Board of Directors authorized a new program to repurchase up to $15.0 million of our common stock primarily to return capital to shareholders and to support our employee stock purchase program. This new authorization began on November 1, 2014 and expires on October 31, 2015. Shares repurchased under the program may be made through the open market and privately negotiated transactions from time to time and in amounts that management deems appropriate. The amount and timing of share repurchases will depend upon market conditions and other corporate considerations. We did not repurchase shares under this program during the first six months of fiscal 2015.
	Our prior share repurchase authorization program expired on October 31, 2014. During the month of October 2014, we repurchased 287,787 shares under this program for $2.3 million.
	In addition to the shares repurchased under the prior Board authorized repurchase program, during the six months ended March 31, 2015, our employees forfeited 9,371 shares in order to satisfy $0.1 million of withholding tax obligations related to stock-based compensation, pursuant to terms of awards under our board and shareholder-approved compensation plans.

Restructuring

Restructuring	6 Months Ended
	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
RESTRUCTURING	RESTRUCTURING
	Below is a summary of the restructuring charges and other activity within the restructuring accrual (in thousands):
		2015 Restructuring			2014			2013
					Restructuring			Restructuring
		Employee			Employee			Employee			Total
		Termination			Termination			Termination
		Costs			Costs			Costs
	Balance at September 30, 2013	$	—		$	—		$	350		$	350
	Restructuring charge	—			152			—			152
	Payments	—			(152		)	(279		)	(431		)
	Reversals	—			—			(71		)	(71		)
	Balance at September 30, 2014	—			—			—			—
	Restructuring charge	518			—			—			518
	Payments	(342		)	—			—			(342		)
	Balance at March 31, 2015	$	176		$	—		$	—		$	176
	Fiscal 2015 Restructuring
	On February 20, 2015, we announced a restructuring plan related to our Etherios operations in order to refocus the business on CRM and service cloud implementations. We recorded a restructuring charge of $0.3 million related to severance during the second quarter of fiscal 2015. We scaled the business to current and expected revenue levels resulting in an elimination of approximately 21 positions. The payments associated with these charges are expected to be completed by the end of fiscal 2015.
	On January 22, 2015, we announced the closure of our India location. The March closure resulted in the elimination of approximately 38 employees from engineering, sales and administration. We recorded a restructuring charge of $0.2 million related to severance during the second quarter of fiscal 2015. The majority of this severance was paid during the second quarter of fiscal 2015.
	Fiscal 2014 Restructuring
	On October 31, 2013, we announced our intention to restructure certain of our operations in India. The restructuring was primarily associated with cost reduction initiatives resulting in the elimination of approximately 40 engineering and sales positions in our work force. We recorded a restructuring charge of $0.2 million related to severance during the first quarter of fiscal 2014. The majority of this severance was paid during the first quarter of fiscal 2014.
	Fiscal 2013 Restructuring
	On September 27, 2013, we announced our intention to restructure certain of our operations in the U.S. The restructuring was primarily associated with cost reduction initiatives and resulted in the elimination of 15 positions in our work force. We recorded a restructuring charge of $0.4 million for severance during the fourth quarter of fiscal 2013. The payments associated with these charges and all the actions associated with the restructuring were completed during the first quarter of fiscal 2014.

Basis_of_Presentation_of_Unaud1

Basis of Presentation of Unaudited Interim Condensed Consolidated Financial Statements and Significant Accounting Policies (Policies)	6 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements
	Not Yet Adopted
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-09, “Revenue from Contracts with Customers.” This guidance provides a five-step analysis in determining when and how revenue is recognized so that an entity will recognize revenue when it transfers promised goods or services to customers in an amount that reflects what it expects in exchange for the goods and services. It also requires more detailed disclosures to enable users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. This guidance is effective for fiscal years (and interim reporting periods within those years) beginning after December 15, 2016. We expect to adopt this guidance beginning with our fiscal quarter ending December 31, 2017. We are evaluating the impact that the adoption will have on our consolidated financial statements.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	6 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of Calculation of Numerator and Denominator in Earnings Per Share	The following table is a reconciliation of the numerators and denominators in the net income per common share calculations (in thousands, except per common share data):
		Three months ended March 31,				Six months ended March 31,
		2015		2014		2015		2014
	Numerator:
	Net income	$	1,446	$	738	$	1,107	$	1,426
	Denominator:
	Denominator for basic net income per common share — weighted average shares outstanding	24,492		25,644		24,319		25,680
	Effect of dilutive securities:
	Stock options and restricted stock units	781		500		497		509
	Denominator for diluted net income per common share — adjusted weighted average shares	25,273		26,144		24,816		26,189
	Net income per common share, basic	$	0.06	$	0.03	$	0.05	$	0.06
	Net income per common share, diluted	$	0.06	$	0.03	$	0.04	$	0.05

Selected_Balance_Sheet_Data_Ta

Selected Balance Sheet Data (Tables)	6 Months Ended
	Mar. 31, 2015
Selected Balance Sheet Data [Abstract]
Schedule of Selected Balance Sheet Data	(in thousands)
		March 31, 2015		September 30, 2014
	Accounts receivable, net:
	Accounts receivable	$	28,937	$	28,943
	Less allowance for doubtful accounts	322		367
	Accounts receivable, net	$	28,615	$	28,576
	Inventories:
	Raw materials	$	27,773	$	26,402
	Work in process	789		315
	Finished goods	5,319		4,530
	Inventories	$	33,881	$	31,247

Marketable_Securities_Tables

Marketable Securities (Tables)	6 Months Ended
	Mar. 31, 2015
Marketable Securities [Abstract]
Schedule of Marketable Securities	At March 31, 2015 our marketable securities were (in thousands):
		Amortized		Unrealized			Unrealized			Fair Value (1)
		Cost (1)		Gains			Losses
	Current marketable securities:
	Corporate bonds	$	30,255	$	—		$	(41	)	$	30,214
	Commercial paper	2,000		—			—			2,000
	Certificates of deposit	7,002		7			(3		)	7,006
	Current marketable securities	39,257		7			(44		)	39,220
	Non-current marketable securities:
	Corporate bonds	3,048		—			(10		)	3,038
	Certificates of deposit	4,502		12			(2		)	4,512
	Non-current marketable securities	7,550		12			(12		)	7,550
	Total marketable securities	$	46,807	$	19		$	(56	)	$	46,770
	-1	Included in amortized cost and fair value is purchased and accrued interest of $155.
	At September 30, 2014 our marketable securities were (in thousands):
		Amortized		Unrealized			Unrealized			Fair Value (1)
		Cost (1)		Gains			Losses
	Current marketable securities:
	Corporate bonds	$	24,668	$	1		$	(22	)	$	24,647
	Commercial paper	3,998		—			(1		)	3,997
	Certificates of deposit	4,252		2			—			4,254
	Current marketable securities	32,918		3			(23		)	32,898
	Non-current marketable securities:
	Corporate bonds	2,051		—			(4		)	2,047
	Certificates of deposit	9,502		14			(22		)	9,494
	Non-current marketable securities	11,553		14			(26		)	11,541
	Total marketable securities	$	44,471	$	17		$	(49	)	$	44,439
	-1	Included in amortized cost and fair value is purchased and accrued interest of $213.
Schedule of Unrealized Losses on Available-For-Sale Securities	The following tables show the fair values and gross unrealized losses of our available-for-sale marketable securities that have been in a continuous unrealized loss position deemed to be temporary, aggregated by investment category (in thousands):
		March 31, 2015
		Less than 12 Months					More than 12 Months
		Fair Value		Unrealized Losses			Fair Value			Unrealized Losses
	Corporate bonds	$	33,101	$	(51	)	$	—		$	—
	Certificates of deposit	3,995		(5		)	—			—
	Total	$	37,096	$	(56	)	$	—		$	—
		September 30, 2014
		Less than 12 Months					More than 12 Months
		Fair Value		Unrealized Losses			Fair Value			Unrealized Losses
	Corporate bonds	$	23,475	$	(26	)	$	—		$	—
	Commercial paper	3,998		(1		)	—			—
	Certificates of deposit	2,980		(20		)	748			(2		)
	Total	$	30,453	$	(47	)	$	748		$	(2	)

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value of Assets Measured on Recurring Basis	The following tables provide information by level for financial assets that are measured at fair value on a recurring basis (in thousands):
		Total carrying		Fair Value Measurements Using
		value at		Inputs Considered as
		31-Mar-15		Level 1		Level 2		Level 3
	Cash equivalents:
	Money market	$	13,879	$	13,879	$	—	$	—
	Available-for-sale marketable securities:
	Corporate bonds	33,252		—		33,252		—
	Commercial paper	2,000		—		2,000		—
	Certificates of deposit	11,518		—		11,518		—
	Total cash equivalents and marketable securities	$	60,649	$	13,879	$	46,770	$	—
	measured at fair value
		Total carrying		Fair Value Measurements Using
		value at		Inputs Considered as
		30-Sep-14		Level 1		Level 2		Level 3
	Cash equivalents:
	Money market	$	19,630	$	19,630	$	—	$	—
	Available-for-sale marketable securities:
	Corporate bonds	26,694		—		26,694		—
	Commercial paper	3,997		—		3,997		—
	Certificates of deposit	13,748		—		13,748		—
	Total cash equivalents and marketable securities	$	64,069	$	19,630	$	44,439	$	—
	measured at fair value

Goodwill_and_Other_Identifiabl1

Goodwill and Other Identifiable Intangible Assets, Net (Tables)	6 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Amortizable Identifiable Intangible Assets	Amortizable identifiable intangible assets were (in thousands):
		March 31, 2015								September 30, 2014
		Gross			Accum.			Net		Gross		Accum.			Net
		carrying			amort.					carrying		amort.
		amount								amount
	Purchased and core technology	$	45,298		$	(44,949	)	$	349	$	45,952	$	(45,162	)	$	790
	License agreements	—			—			—		2,440		(2,440		)	—
	Patents and trademarks	11,830			(10,302		)	1,528		11,667		(9,799		)	1,868
	Customer relationships	18,371			(15,468		)	2,903		18,894		(15,445		)	3,449
	Non-compete agreements	1,100			(532		)	568		1,100		(422		)	678
	Order backlog	—			—			—		360		(360		)	—
	Total	$	76,599		$	(71,251	)	$	5,348	$	80,413	$	(73,628	)	$	6,785
Schedule of Estimated Amortization Expense Related to Identifiable Intangible Assets	Estimated amortization expense related to identifiable intangible assets for the remainder of fiscal 2015 and the five succeeding fiscal years is (in thousands):
	2015 six months	$	1,378
	2016	1,927
	2017	901
	2018	482
	2019	438
	2020	168
Schedule of Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill are (in thousands):
		Six months ended
		March 31,
		2015			2014
	Beginning balance, October 1	$	103,398		$	103,569
	Foreign currency translation adjustment	(1,656		)	476
	Ending balance, March 31	$	101,742		$	104,045

Income_Taxes_Tables

Income Taxes (Tables)	6 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Schedule of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is (in thousands):
	Unrecognized tax benefits as of September 30, 2014	$	2,301
	Increases related to:
	Prior year income tax positions	50
	Decreases related to:
	Prior year income tax positions	(255		)
	Settlements	(74		)
	Expiration of statute of limitations	(139		)
	Unrecognized tax benefits as of March 31, 2015	$	1,883

Product_Warranty_Obligation_Ta

Product Warranty Obligation (Tables)	6 Months Ended
	Mar. 31, 2015
Product Warranties Disclosures [Abstract]
Schedule of Product Warranty Accrual	The following table summarizes the activity associated with the product warranty accrual (in thousands) and is included on our Condensed Consolidated Balance Sheets within current liabilities:
		Balance at		Warranties		Settlements			Balance at
	Period	1-Jan		issued		made			March 31
	Three months ended March 31, 2015	$	950	$	206	$	(233	)	$	923
	Three months ended March 31, 2014	$	1,013	$	176	$	(217	)	$	972
		Balance at		Warranties		Settlements			Balance at
	Period	1-Oct		issued		made			March 31
	Six months ended March 31, 2015	$	862	$	497	$	(436	)	$	923
	Six months ended March 31, 2014	$	1,063	$	322	$	(413	)	$	972

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	6 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock-Based Compensation Expense	Stock-based compensation expense is included in the consolidated results of operations as follows (in thousands):
		Three months ended March 31,							Six months ended March 31,
		2015				2014			2015			2014
	Cost of sales	$	83			$	82		$	189		$	150
	Sales and marketing	306				282			649			568
	Research and development	196				177			388			383
	General and administrative	453				506			996			969
	Stock-based compensation before income taxes	1,038				1,047			2,222			2,070
	Income tax benefit	(361		)		(355		)	(775		)	(703		)
	Stock-based compensation after income taxes	$	677			$	692		$	1,447		$	1,367
Schedule of Stock Option Activity	The following table summarizes our stock option activity (in thousands, except per common share amounts):
			Options Outstanding			Weighted Average Exercised Price		Weighted Average Contractual Term (in years)	Aggregate Intrinsic Value (1)
	Balance at September 30, 2014		6,029			$10.61
	Granted		704			7.82
	Exercised		(677	)		8.87
	Forfeited / Canceled		(1,168	)		11.58
	Balance at March 31, 2015		4,888			$10.22		5.3	$	3,263
	Exercisable at March 31, 2015		3,482			$10.70		4.5	$	1,603
	(1) The aggregate intrinsic value represents the total pre-tax intrinsic value, based on our closing stock price of $9.98 as of March 31, 2015, which would have been received by the option holders had all option holders exercised their options as of that date. The intrinsic value of an option is the amount by which the fair value of the underlying stock exceeds its exercise price.
Schedule of Valuation Assumptions	The table below shows the weighted average fair value, which was determined based upon the fair value of each option on the grant date utilizing the Black-Scholes option-pricing model and the related assumptions:
		Six months ended March 31,
		2015				2014
	Fair value of options granted (in thousands)	$	2,046			$	3,995
	Weighted average per option grant date fair value	$	2.91			$	4.44
	Assumptions used for option grants:
	Risk free interest rate	1.77% - 1.85%				1.76% - 1.91%
	Expected term	6.00 years				6.00 years
	Expected volatility	35% - 36%				40%
	Weighted average volatility	35%				40%
	Expected dividend yield	0				0
Schedule of Nonvested Restricted Stock Units	A summary of our non-vested restricted stock units as of March 31, 2015 and changes during the six months then ended is presented below (in thousands, except per common share amounts):
		Number of Awards			Weighted Average Grant Date Fair Value
	Nonvested at September 30, 2014	171			$	9.35
	Granted	432			$	7.96
	Vested	(81	)		$	9.6
	Canceled	(29	)		$	7.91
	Nonvested at December 31, 2014	493			$	8.17

Restructuring_Tables

Restructuring (Tables)	6 Months Ended
	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Reserve	Below is a summary of the restructuring charges and other activity within the restructuring accrual (in thousands):
		2015 Restructuring			2014			2013
					Restructuring			Restructuring
		Employee			Employee			Employee			Total
		Termination			Termination			Termination
		Costs			Costs			Costs
	Balance at September 30, 2013	$	—		$	—		$	350		$	350
	Restructuring charge	—			152			—			152
	Payments	—			(152		)	(279		)	(431		)
	Reversals	—			—			(71		)	(71		)
	Balance at September 30, 2014	—			—			—			—
	Restructuring charge	518			—			—			518
	Payments	(342		)	—			—			(342		)
	Balance at March 31, 2015	$	176		$	—		$	—		$	176

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Net income	$1,446	$738	$1,107	$1,426
Denominator for basic net income per common share b weighted average shares outstanding	24,492,000	25,644,000	24,319,000	25,680,000
Effect of dilutive securities:
Stock options and restricted stock units	781,000	500,000	497,000	509,000
Denominator for diluted net income per common share b adjusted weighted average shares	25,273,000	26,144,000	24,816,000	26,189,000
Net income per common share, basic (USD per share)	$0.06	$0.03	$0.05	$0.06
Net income per common share, diluted (USD per share)	$0.06	$0.03	$0.04	$0.05
Potentially dilutive securities excluded from computation of earnings per share	2,366,812	3,347,082	3,496,463	2,627,905

Selected_Balance_Sheet_Data_De

Selected Balance Sheet Data (Details) (USD $)	Mar. 31, 2015	Sep. 30, 2014
In Thousands, unless otherwise specified
Accounts receivable, net:
Accounts receivable	$28,937	$28,943
Less allowance for doubtful accounts	322	367
Accounts receivable, net	28,615	28,576
Inventories:
Raw materials	27,773	26,402
Work in process	789	315
Finished goods	5,319	4,530
Inventories	$33,881	$31,247

Marketable_Securities_Details

Marketable Securities (Details) (USD $)	3 Months Ended			6 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014	Mar. 31, 2015		Mar. 31, 2014	Sep. 30, 2014
	Security			Security
Schedule of Available-for-sale Securities [Line Items]
Number of securities below amortized cost basis	40			40
Number of securities	68			68
Proceeds from maturities of marketable securities	$10,400		$6,700	$19,763		$13,778
Available-for-sale securities, amortized cost basis	46,807	[1]		46,807	[1]		44,471	[2]
Available-for-sale securities, unrealized gains	19			19			17
Available-for-sale securities, unrealized losses	-56			-56			-49
Available-for-sale marketable securities, fair value	46,770	[1]		46,770	[1]		44,439	[2]
Purchased and accrued interest	155			155			213
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months	37,096			37,096			30,453
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-56			-56			-47
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer	0			0			748
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0			0			-2
Current Assets
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, next twelve months, maximum year mature				1 year
Available-for-sale securities, amortized cost basis	39,257	[1]		39,257	[1]		32,918	[2]
Available-for-sale securities, unrealized gains	7			7			3
Available-for-sale securities, unrealized losses	-44			-44			-23
Available-for-sale marketable securities, fair value	39,220	[1]		39,220	[1]		32,898	[2]
Non-current Assets
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, year two through five, maximum year mature				3 years
Available-for-sale securities, amortized cost basis	7,550	[1]		7,550	[1]		11,553	[2]
Available-for-sale securities, unrealized gains	12			12			14
Available-for-sale securities, unrealized losses	-12			-12			-26
Available-for-sale marketable securities, fair value	7,550	[1]		7,550	[1]		11,541	[2]
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months	33,101			33,101			23,475
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-51			-51			-26
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer	0			0			0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0			0			0
Corporate Bonds | Current Assets
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, amortized cost basis	30,255	[1]		30,255	[1]		24,668	[2]
Available-for-sale securities, unrealized gains	0			0			1
Available-for-sale securities, unrealized losses	-41			-41			-22
Available-for-sale marketable securities, fair value	30,214	[1]		30,214	[1]		24,647	[2]
Corporate Bonds | Non-current Assets
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, amortized cost basis	3,048	[1]		3,048	[1]		2,051	[2]
Available-for-sale securities, unrealized gains	0			0			0
Available-for-sale securities, unrealized losses	-10			-10			-4
Available-for-sale marketable securities, fair value	3,038	[1]		3,038	[1]		2,047	[2]
Commercial Paper
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months							3,998
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss							-1
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer							0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss							0
Commercial Paper | Current Assets
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, amortized cost basis	2,000	[1]		2,000	[1]		3,998	[2]
Available-for-sale securities, unrealized gains	0			0			0
Available-for-sale securities, unrealized losses	0			0			-1
Available-for-sale marketable securities, fair value	2,000	[1]		2,000	[1]		3,997	[2]
Certificates of Deposit
Schedule of Available-for-sale Securities [Line Items]
Fair value of available-for-sale securities in continuous unrealized loss position for less than twelve months	3,995			3,995			2,980
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-5			-5			-20
Fair value of available-for-sale securities in continuous unrealized loss position for twelve months or longer	0			0			748
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0			0			-2
Certificates of Deposit | Current Assets
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, amortized cost basis	7,002	[1]		7,002	[1]		4,252	[2]
Available-for-sale securities, unrealized gains	7			7			2
Available-for-sale securities, unrealized losses	-3			-3			0
Available-for-sale marketable securities, fair value	7,006	[1]		7,006	[1]		4,254	[2]
Certificates of Deposit | Non-current Assets
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, amortized cost basis	4,502	[1]		4,502	[1]		9,502	[2]
Available-for-sale securities, unrealized gains	12			12			14
Available-for-sale securities, unrealized losses	-2			-2			-22
Available-for-sale marketable securities, fair value	$4,512	[1]		$4,512	[1]		$9,494	[2]
[1]	Included in amortized cost and fair value is purchased and accrued interest of $155
[2]	Included in amortized cost and fair value is purchased and accrued interest of $213.

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Mar. 31, 2015		Sep. 30, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	$46,770	[1]	$44,439	[2]
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable securities measured at fair value	13,879		19,630
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable securities measured at fair value	46,770		44,439
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable securities measured at fair value	0		0
Money Market Funds | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	13,879		19,630
Money Market Funds | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0		0
Money Market Funds | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0		0
Corporate Bonds | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0		0
Corporate Bonds | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	33,252		26,694
Corporate Bonds | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0		0
Commercial Paper | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0		0
Commercial Paper | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	2,000		3,997
Commercial Paper | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0		0
Certificates of Deposit | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0		0
Certificates of Deposit | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	11,518		13,748
Certificates of Deposit | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	0		0
Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable securities measured at fair value	60,649		64,069
Estimate of Fair Value Measurement [Member] | Money Market Funds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	13,879		19,630
Estimate of Fair Value Measurement [Member] | Corporate Bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	33,252		26,694
Estimate of Fair Value Measurement [Member] | Commercial Paper | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	2,000		3,997
Estimate of Fair Value Measurement [Member] | Certificates of Deposit | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	$11,518		$13,748
[1]	Included in amortized cost and fair value is purchased and accrued interest of $155
[2]	Included in amortized cost and fair value is purchased and accrued interest of $213.

Goodwill_and_Other_Identifiabl2

Goodwill and Other Identifiable Intangible Assets, Net (Details) (USD $)	Mar. 31, 2015	Sep. 30, 2014
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$76,599	$80,413
Accumulated amortization	-71,251	-73,628
Net	5,348	6,785
Purchased and Core Technology
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	45,298	45,952
Accumulated amortization	-44,949	-45,162
Net	349	790
License Agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	0	2,440
Accumulated amortization	0	-2,440
Net	0	0
Patents and Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	11,830	11,667
Accumulated amortization	-10,302	-9,799
Net	1,528	1,868
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	18,371	18,894
Accumulated amortization	-15,468	-15,445
Net	2,903	3,449
Non-compete Agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,100	1,100
Accumulated amortization	-532	-422
Net	568	678
Order Backlog
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	0	360
Accumulated amortization	0	-360
Net	$0	$0

Goodwill_and_Other_Identifiabl3

Goodwill and Other Identifiable Intangible Assets, Net Amortization Expense (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$800	$900	$1,537	$1,891
2015 six months	1,378		1,378
2016	1,927		1,927
2017	901		901
2018	482		482
2019	438		438
2020	$168		$168

Goodwill_and_Other_Identifiabl4

Goodwill and Other Identifiable Intangible Assets, Net Goodwill (Details) (USD $)	0 Months Ended	6 Months Ended
	Jun. 30, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014	Jun. 30, 2014
					industry
Goodwill [Roll Forward]
Beginning balance		$103,398,000	$103,569,000
Foreign currency translation adjustment		-1,656,000	476,000
Ending balance		101,742,000	104,045,000
Goodwill [Line Items]
Market capitalization	235,800,000				235,800,000
Carrying value	$273,000,000	$265,133,000		$265,298,000	$273,000,000
Control premium percent	35.00%
Percent fair value in excess of carrying value of goodwill	17.00%				17.00%
Target companies equity benchmark	50.00%				50.00%
Number of industries encompasses similar products	3				3
Minimum [Member]
Goodwill [Line Items]
Control premium percent	30.00%
Maximum
Goodwill [Line Items]
Control premium percent	40.00%

Income_Taxes_Unrecognized_Tax_

Income Taxes (Unrecognized Tax Benefits) (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning balance	$2,301
Increases related to Prior year income tax positions	50
Decreases related to Prior year income tax positions	-255
Decreases related to Settlements	-74
Decreases related to Expiration of statute of limitations	-139
Unrecognized tax benefits, ending balance	$1,883

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$874,000	($1,317,000)	$19,000	($1,241,000)
Income tax expense (benefit) specific to the period			-500,000
Net tax benefit mostly related to research and development tax credits				-1,300,000
Unrecognized tax benefits that would impact effective tax rate	1,900,000		1,900,000
Expected change in unrecognized tax benefits, minimum	600,000		600,000
Income tax penalties and interest accrued	400,000		400,000		423,000
Accumulated undistributed foreign earnings	26,000,000		26,000,000
Income Tax Contingency [Line Items]
Unrecognized tax benefits	1,883,000		1,883,000		2,301,000
Minimum [Member]
Income Tax Contingency [Line Items]
Estimate of unrecognized deferred tax liability	500,000		500,000
Maximum
Income Tax Contingency [Line Items]
Estimate of unrecognized deferred tax liability	1,500,000		1,500,000
Non-current income taxes payable
Income Tax Contingency [Line Items]
Unrecognized tax benefits	1,500,000		1,500,000
Non-current deferred tax assets
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$400,000		$400,000

Product_Warranty_Obligation_De

Product Warranty Obligation (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Product Warranties Disclosures [Abstract]
Warranty period, minimum			1 year
Warranty period, maximum			5 years
Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$950	$1,013	$862	$1,063
Warranties issued	206	176	497	322
Settlements made	-233	-217	-436	-413
Ending balance	$923	$972	$923	$972

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jan. 27, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from stock option plan transactions	$6,006,000	$3,209,000
Total intrinsic value of all options exercised	800,000	500,000
Forfeiture rate	6.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost nonvested awards	4,400,000
Weighted average period, unrecognized compensation cost, nonvested awards	3 years
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost nonvested restricted stock units	3,400,000
Weighted average period, unrecognized compensation cost, nonvested awards	1 year 8 months 12 days
The 2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized			2,250,000
Number of shares available for future grants	1,492,183
The 2014 Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Expiration period	8 years
The Purchase Plan | The Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of continuous days of service	90 days
Number of hours per week employed	20 hours
Percent of market value	85.00%
Offering period	3 months
Employee contributions	$500,000	$600,000
Common shares issued to employees	72,306	65,832
Shares available for future issuance	669,072
Director | The 2014 Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Executives and Employees | The 2014 Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years

StockBased_Compensation_StockB

Stock-Based Compensation (Stock-Based Compensation Expense) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation before income taxes	$1,038	$1,047	$2,222	$2,070
Income tax benefit	-361	-355	-775	-703
Stock-based compensation after income taxes	677	692	1,447	1,367
Cost of Sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation before income taxes	83	82	189	150
Sales and Marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation before income taxes	306	282	649	568
Research and Development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation before income taxes	196	177	388	383
General and Administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation before income taxes	$453	$506	$996	$969

StockBased_Compensation_Option

Stock-Based Compensation (Options and Common Shares Reserved for Grant) (Details) (Stock Options, USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015
Stock Options
Options Outstanding [Roll Forward]
Options Outstanding, Beginning Balance	6,029
Options Outstanding, Granted	704
Options Outstanding, Exercised	-677
Options Outstanding, Forfeited / Canceled	-1,168
Options Outstanding, Ending Balance	4,888
Options Outstanding, Exercisable	3,482
Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Beginning Balance	$10.61
Weighted Average Exercise Price, Granted	$7.82
Weighted Average Exercise Price, Exercised	$8.87
Weighted Average Exercise Price, Forfeited / Canceled	$11.58
Weighted Average Exercise Price, Ending Balance	$10.22
Weighted Average Exercise Price, Exercisable	$10.70
Weighted Average Remaining Contractual Term [Abstract]
Weighted Average Remaining Contractual Term, Outstanding	5 years 3 months 18 days
Weighted Average Remaining Contractual Term, Exercisable	4 years 6 months
Aggregate Intrinsic Value [Abstract]
Aggregate Intrinsic Value, Outstanding	$3,263	[1]
Aggregate Intrinsic Value, Exercisable	$1,603	[1]
Closing Stock Price	$9.98
[1]	The aggregate intrinsic value represents the total pre-tax intrinsic value, based on our closing stock price of $9.98 as of MarchB 31, 2015, which would have been received by the option holders had all option holders exercised their options as of that date. The intrinsic value of an option is the amount by which the fair value of the underlying stock exceeds its exercise price.

StockBased_Compensation_Fair_V

Stock-Based Compensation (Fair Value Assumptions) (Details) (Stock Options, USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of options granted	$2,046	$3,995
Weighted average per option grant date fair value	$2.91	$4.44
Assumptions Used For Options Grants [Abstract]
Risk free interest rate, minimum	1.77%	1.76%
Risk free interest rate, maximum	1.85%	1.91%
Expected term	6 years	6 years
Expected volatility rate, minimum	35.00%	40.00%
Expected volatility rate, maximum	36.00%
Weighted average volatility	35.00%	40.00%
Expected dividend yield	0.00%	0.00%

StockBased_Compensation_NonVes

Stock-Based Compensation (Non-Vested Options) (Details) (Restricted Stock Units, USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015
Restricted Stock Units
Nonvested Number of Restricted Stock Units [Roll Forward]
Number of Restricted Stock Units, Beginning Balance	171
Number of Restricted Stock Units, Granted	432
Number of Restricted Stock Units, Vested	-81
Number of Restricted Stock Units, Canceled	-29
Number of Restricted Stock Units, Ending Balance	493
Nonvested Restricted Stock Units, Weighted Average Grant Date Fair Value per Common Share [Roll Forward]
Restricted Stock Units, Weighted Average Grant Date Fair Value per Common Share, Beginning Balance	$9.35
Restricted Stock Units, Weighted Average Grant Date Fair Value per Common Share, Granted	$7.96
Restricted Stock Units, Weighted Average Grant Date Fair Value per Common Share, Vested	$9.60
Restricted Stock Units, Weighted Average Grant Date Fair Value per Common Share, Canceled	$7.91
Restricted Stock Units, Weighted Average Grant Date Fair Value per Common Share, Ending Balance	$8.17

Common_Stock_Repurchase_Detail

Common Stock Repurchase (Details) (USD $)	1 Months Ended	6 Months Ended
In Millions, except Share data, unless otherwise specified	Oct. 31, 2014	Mar. 31, 2015	Oct. 28, 2014
Common Stock Repurchase [Abstract]
Stock repurchase program, authorized amount			$15
Shares repurchased	287,787
Shares repurchased, value	2.3
Shares Forfeited for Withholding Tax Obligations for Share Based Compensation		9,371
Amount of Shares Forfeited Related to Tax Withholding for Share-based Compensation		$0.10

Restructuring_Restructuring_De

Restructuring Restructuring (Details) (USD $)	6 Months Ended	12 Months Ended	0 Months Ended		12 Months Ended	0 Months Ended	3 Months Ended	0 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014	Oct. 31, 2013	Sep. 27, 2013	Sep. 30, 2013	Feb. 20, 2015	Mar. 31, 2015	Jan. 22, 2015
			employees	employees		employees		employees
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$518	$152
Payments for Restructuring	-342	-431
Restructuring Reserve, Accrual Adjustment		-71
Restructuring Reserve	176	0			350		176
Fiscal 2014 Restructuring
Restructuring Cost and Reserve [Line Items]
Number of employees eliminated			40
Fiscal 2013 Restructuring
Restructuring Cost and Reserve [Line Items]
Number of employees eliminated				15
Employee Termination Costs | Fiscal 2015 Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring charge	518	0
Payments for Restructuring	-342	0
Restructuring Reserve, Accrual Adjustment		0
Restructuring Reserve	176	0			0		176
Employee Termination Costs | Fiscal 2014 Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring charge	0	152
Payments for Restructuring	0	-152
Restructuring Reserve, Accrual Adjustment		0
Restructuring Reserve	0	0			0		0
Employee Termination Costs | Fiscal 2013 Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring charge	0	0			350
Payments for Restructuring	0	-279
Restructuring Reserve, Accrual Adjustment		-71
Restructuring Reserve	0	0			350		0
UNITED STATES | Fiscal 2015 Restructuring
Restructuring Cost and Reserve [Line Items]
Number of employees eliminated						21
UNITED STATES | Employee Termination Costs | Fiscal 2015 Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring charge							300
INDIA | Fiscal 2015 Restructuring
Restructuring Cost and Reserve [Line Items]
Number of employees eliminated								38
INDIA | Employee Termination Costs | Fiscal 2015 Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring charge								200