Amtech Systems (ASYS) 10-Q 7 May 20 2020 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Mar. 31, 2020	May 01, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Entity Registrant Name	AMTECH SYSTEMS, INC.
Entity Central Index Key	0000720500
Current Fiscal Year End Date	--09-30
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		14,047,172
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	0-11412
Entity Tax Identification Number	86-0411215
Entity Address, Address Line One	131 South Clark Drive
Entity Address, City or Town	Tempe
Entity Address, State or Province	AZ
Entity Address, Postal Zip Code	85281
City Area Code	480
Local Phone Number	967-5146
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	AZ
Document Quarterly Report	true
Document Transition Report	false
Trading Symbol	ASYS
Title of 12(b) Security	Common Stock, par value $0.01 per share
Security Exchange Name	NASDAQ

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Current Assets
Cash and cash equivalents	$ 49,268	$ 52,982
Restricted cash		101
Accounts receivable (less allowance for doubtful accounts of $151 and $172 at March 31, 2020, and September 30, 2019, respectively)	11,285	12,873
Inventories	17,332	17,532
Notes and other receivables	1,250
Income taxes receivable	240
Held-for-sale assets		22,755
Other current assets	2,192	2,027
Total current assets	81,567	108,270
Property, Plant and Equipment - Net	10,100	10,217
Intangible Assets - Net	739	870
Goodwill - Net	6,633	6,633
Other Assets	559	487
Total Assets	99,598	126,477
Current Liabilities
Accounts payable	4,447	4,371
Accrued compensation and related taxes	1,525	2,717
Accrued warranty expense	398	556
Other accrued liabilities	1,423	1,274
Current maturities of long-term debt	372	371
Contract liabilities	1,532	1,378
Income taxes payable		1,434
Held-for-sale liabilities		18,547
Total current liabilities	9,697	30,648
Long-Term Debt	4,989	5,178
Long-Term Lease Liability	29
Income Taxes Payable	2,726	3,199
Total Liabilities	17,441	39,025
Commitments and Contingencies
Shareholders’ Equity
Preferred stock; 100,000,000 shares authorized; none issued
Common stock; $0.01 par value; 100,000,000 shares authorized; shares issued and outstanding: 14,041,322 and 14,268,797 at March 31, 2020 and September 30, 2019, respectively	140	143
Additional paid-in capital	124,145	125,098
Accumulated other comprehensive loss	(1,814)	(11,233)
Retained deficit	(40,314)	(26,556)
Total shareholders’ equity	82,157	87,452
Total Liabilities and Shareholders’ Equity	$ 99,598	$ 126,477

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Current Assets
Allowance for doubtful accounts	$ 151	$ 172
Shareholders’ Equity
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	14,041,322	14,268,797
Common stock, shares outstanding	14,041,322	14,268,797

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenues, net of returns and allowances	$ 14,460	$ 20,633	$ 35,152	$ 43,858
Cost of sales	9,102	12,706	21,620	26,911
Gross profit	5,358	7,927	13,532	16,947
Selling, general and administrative	5,415	5,793	11,330	12,419
Research, development and engineering	915	713	1,537	1,579
Restructuring charges		173		1,037
Operating (loss) income	(972)	1,248	665	1,912
Loss on sale of subsidiary			(2,793)
Interest income and other, net	595	96	525	262
(Loss) income from continuing operations before income taxes	(377)	1,344	(1,603)	2,174
Income tax provision	166	332	207	914
(Loss) income from continuing operations, net of tax	(543)	1,012	(1,810)	1,260
Loss from discontinued operations, net of tax	(11,151)	(6,647)	(11,816)	(9,267)
Net loss	$ (11,694)	$ (5,635)	$ (13,626)	$ (8,007)
(Loss) Income Per Basic Share:
Basic (loss) income per share from continuing operations	$ (0.04)	$ 0.07	$ (0.13)	$ 0.09
Basic loss per share from discontinued operations	(0.79)	(0.47)	(0.83)	(0.65)
Net loss per basic share	(0.83)	(0.40)	(0.96)	(0.56)
(Loss) Income Per Diluted Share:
Diluted (loss) income per share from continuing operations	(0.04)	0.07	(0.13)	0.09
Diluted loss per share from discontinued operations	(0.79)	(0.47)	(0.83)	(0.65)
Net loss per diluted share	$ (0.83)	$ (0.40)	$ (0.96)	$ (0.56)
Weighted average shares outstanding - basic	14,150	14,228	14,193	14,224
Weighted average shares outstanding - diluted	14,150	14,258	14,193	14,255

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (11,694)	$ (5,635)	$ (13,626)	$ (8,007)
Foreign currency translation adjustment	(459)	(210)	622	(786)
Reclassification adjustment for net foreign currency translation losses included in net loss	7,205		8,797
Comprehensive loss	$ (4,948)	$ (5,845)	$ (4,207)	$ (8,793)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid- In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)
Beginning balance at Sep. 30, 2018	$ 93,090	$ 142		$ 124,316	$ (9,974)	$ (21,394)
Beginning balance (in shares) at Sep. 30, 2018		14,217,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,372)					(2,372)
Translation adjustment	(576)				(576)
Stock compensation expense	169			169
Stock options exercised	37			37
Stock options exercised (in shares)		11,000
Ending balance at Dec. 31, 2018	90,348	$ 142		124,522	(10,550)	(23,766)
Ending balance (in shares) at Dec. 31, 2018		14,228,000
Beginning balance at Sep. 30, 2018	93,090	$ 142		124,316	(9,974)	(21,394)
Beginning balance (in shares) at Sep. 30, 2018		14,217,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(8,007)
Ending balance at Mar. 31, 2019	84,697	$ 142		124,716	(10,760)	(29,401)
Ending balance (in shares) at Mar. 31, 2019		14,228,000
Beginning balance at Dec. 31, 2018	90,348	$ 142		124,522	(10,550)	(23,766)
Beginning balance (in shares) at Dec. 31, 2018		14,228,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(5,635)					(5,635)
Translation adjustment	(210)				(210)
Stock compensation expense	194			194
Ending balance at Mar. 31, 2019	84,697	$ 142		124,716	(10,760)	(29,401)
Ending balance (in shares) at Mar. 31, 2019		14,228,000
Beginning balance at Sep. 30, 2019	$ 87,452	$ 143		125,098	(11,233)	(26,556)
Beginning balance (in shares) at Sep. 30, 2019	14,268,797	14,269,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (1,932)					(1,932)
Translation adjustment	2,673				2,673
Stock compensation expense	$ 68			68
Stock repurchases (in Shares)	0
Stock options exercised	$ 701	$ 1		700
Stock options exercised (in shares)		117,000
Ending balance at Dec. 31, 2019	88,962	$ 144		125,866	(8,560)	(28,488)
Ending balance (in shares) at Dec. 31, 2019		14,386,000
Beginning balance at Sep. 30, 2019	$ 87,452	$ 143		125,098	(11,233)	(26,556)
Beginning balance (in shares) at Sep. 30, 2019	14,268,797	14,269,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (13,626)
Ending balance at Mar. 31, 2020	$ 82,157	$ 140		124,145	(1,814)	(40,314)
Ending balance (in shares) at Mar. 31, 2020	14,041,322	14,041,000
Beginning balance at Dec. 31, 2019	$ 88,962	$ 144		125,866	(8,560)	(28,488)
Beginning balance (in shares) at Dec. 31, 2019		14,386,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(11,694)					(11,694)
Translation adjustment	6,746				6,746
Stock compensation expense	65			65
Stock repurchases	$ (2,000)		$ (2,000)
Stock repurchases (in Shares)	(366,000)		(366,000)
Retirement of stock repurchases		$ (4)	$ 2,000	(1,864)		(132)
Retirement of stock repurchases (in Shares)		(366,000)	366,000
Stock options exercised	$ 78			78
Stock options exercised (in shares)		21,000
Ending balance at Mar. 31, 2020	$ 82,157	$ 140		$ 124,145	$ (1,814)	$ (40,314)
Ending balance (in shares) at Mar. 31, 2020	14,041,322	14,041,000

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		6 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Operating Activities
Net loss		$ (13,626)	$ (8,007)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization		694	888
Write-down of inventory		330	2,794
Deferred income taxes		784	7
Non-cash share-based compensation expense		133	363
Loss on sales of subsidiaries		13,709
(Reversal of) provision for allowance for doubtful accounts, net		(32)	1,141
Other, net		4	115
Changes in operating assets and liabilities:
Accounts receivable		1,374	(1,533)
Inventories		(527)	(650)
Other assets		3,667	10,143
Accounts payable		(1,849)	(650)
Accrued income taxes		(2,094)	216
Accrued and other liabilities		(228)	(378)
Contract liabilities		(1,063)	(7,516)
Net cash provided by (used in) operating activities		1,276	(3,067)
Investing Activities
Purchases of property, plant and equipment		(345)	(238)
Net cash disposed of in sales of subsidiaries		(9,940)
Net cash used in investing activities		(10,285)	(238)
Financing Activities
Proceeds from the exercise of stock options		779	37
Repurchase of common stock		(2,000)
Payments on long-term debt		(194)	(186)
Net cash used in financing activities		(1,415)	(149)
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash		558	(903)
Net Decrease in Cash, Cash Equivalents and Restricted Cash		(9,866)	(4,357)
Cash, Cash Equivalents and Restricted Cash, Beginning of Period	[1]	59,134	62,496
Cash, Cash Equivalents and Restricted Cash, End of Period	[1]	$ 49,268	$ 58,139
[1]	Includes Cash, Cash Equivalents and Restricted Cash that are included in Held-For-Sale Assets on the Condensed Consolidated Balance Sheets for periods prior to January 22, 2020.

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	6 Months Ended
	Mar. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation and Significant Accounting Policies	1. Basis of Presentation and Significant Accounting Policies Nature of Operations and Basis of Presentation – Amtech Systems, Inc. (the “Company,” “Amtech,” “we,” “our” or “us”) is a leading, global manufacturer of capital equipment, including thermal processing and wafer polishing, and related consumables used in fabricating semiconductor devices, such as silicon carbide (SiC) and silicon power chips, electronic assemblies and light-emitting diodes (LEDs). We sell these products to semiconductor and automotive component manufacturers worldwide, particularly in Asia, North America and Europe. We serve niche markets in industries that are experiencing technological advances and which historically have been very cyclical. Therefore, our future profitability and growth depend on our ability to develop or acquire and market profitable new products and on our ability to adapt to cyclical trends. In the second quarter of fiscal 2019, we began the process to divest our solar business. As such, we have classified substantially all of the Solar segment as held for sale in our Condensed Consolidated Balance Sheets and reported its results as discontinued operations in our Condensed Consolidated Statements of Operations. These divestitures were completed in the second quarter of fiscal 2020. For additional information on the divestitures, see Note 4. For additional information on our segments, see Note 10. The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”), and consequently do not include all disclosures normally required by accounting principles generally accepted in the United States of America. In the opinion of management, the accompanying unaudited interim condensed consolidated financial statements contain all adjustments necessary, all of which are of a normal and recurring nature, to present fairly our financial position, results of operations and cash flows. Certain information and note disclosures normally included in financial statements have been condensed or omitted pursuant to the rules and regulations of the SEC. The condensed balance sheet at September 30, 2019, has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended September 30, 2019. Our fiscal year is from October 1 to September 30. Unless otherwise stated, references to the years 2020 and 2019 relate to the fiscal years ended September 30, 2020 and 2019, respectively. The consolidated results of operations for the three and six months ended March 31, 2020, are not necessarily indicative of the results to be expected for the full fiscal year. Principles of Consolidation – The consolidated financial statements include the accounts of the Company and our wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. Use of Estimates – The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Reclassifications – Certain reclassifications have been made to prior year financial statements to conform to the current year presentation. Results for all periods presented in this report have been reclassified for changes to our reportable segments (Note 10). These reclassifications had no effect on the previously reported consolidated financial statements for any period. Divestitures – Significant accounting policies associated with a decision to dispose of a business are discussed below: Discontinued Operations – A business is classified as discontinued operations if the disposal represents a strategic shift that will have a major effect on operations or financial results and meets the criteria to be classified as held for sale or is disposed of by sale or otherwise. Significant judgments are involved in determining whether a business meets the criteria for discontinued operations reporting and the period in which these criteria are met. If a business is reported as a discontinued operation, the results of operations through the date of sale, including any gain or loss recognized on the disposition, are presented on a separate line of the Condensed Consolidated Statements of Operations. Interest on debt directly attributable to the discontinued operation is allocated to discontinued operations. Assets Held for Sale – An asset or business is classified as held for sale when (i) management commits to a plan to sell and it is actively marketed; (ii) it is available for immediate sale and the sale is expected to be completed within one year; and (iii) it is unlikely significant changes to the plan will be made or that the plan will be withdrawn. In isolated instances, assets held for sale may exceed one year due to events or circumstances beyond our control. The assets and related liabilities are aggregated and reported on separate lines of the Condensed Consolidated Balance Sheets. Shipping Expense – Shipping expenses of $0.1 million and $0.2 million in each of the three months ended March 31, 2020 and 2019, respectively, and $0.3 million and $0.5 million for the six months ended March 31, 2020 and 2019, respectively, are included in selling, general and administrative expenses. Research, Development and Engineering Expense – The table below shows gross research and development expenses and grants earned, in thousands: Three Months Ended March 31, Six Months Ended March 31, 2020 2019 2020 2019 Research, development and engineering $ 1,017 $ 713 $ 1,780 $ 1,579 Grants earned (102 ) — (243 ) — Net research, development and engineering $ 915 $ 713 $ 1,537 $ 1,579 Concentrations of Credit Risk – Our customers consist primarily of semiconductor manufacturers worldwide, as well as the lapping and polishing marketplace. Financial instruments that potentially subject us to significant concentrations of credit risk consist principally of cash and trade accounts receivable. Credit risk is managed by performing ongoing credit evaluations of the customers’ financial condition, by requiring significant deposits where appropriate, and by actively monitoring collections. Letters of credit are required of certain customers depending on the size of the order, type of customer or its creditworthiness, and country of domicile. As of March 31, 2020, one Semiconductor segment customer individually represented 10% of accounts receivable. As of September 30, 2019, one Semiconductor customer individually represented 15% of accounts receivable. We maintain our cash, cash equivalents and restricted cash in multiple financial institutions. Balances in the United States, which account for approximately 86% and 79% of total cash balances at our continuing operations as of March 31, 2020 and September 30, 2019, respectively, are primarily invested in U.S. Treasuries or are in financial institutions insured by the Federal Deposit Insurance Corporation (“FDIC”). The remainder of our cash is maintained with financial institutions with reputable credit ratings in China, the United Kingdom, Singapore and Malaysia. We maintain cash in bank accounts in amounts which at times may exceed federally insured limits. We have not experienced any losses on such accounts. Refer to Note 11 to Condensed Consolidated Financial Statements for information regarding major customers, foreign sales and revenue in other countries subject to fluctuation in foreign currency exchange rates. Impact of Recently Issued Accounting Pronouncements Effective October 1, 2019, we adopted the Financial Accounting Standards Board’s (“FASB”) Accounting Standard Update (“ASU”) No. 2016-02—Leases (Topic 842), using the retrospective cumulative effect adjustment transition method. We elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed us to carry forward the historical lease classification. In addition, we made an accounting policy election not to separate non-lease components from lease components for all existing classes of underlying assets with the exception of land and buildings. We also made an accounting policy election to not record right of use (“ROU”) assets and lease liabilities for leases with an initial term of twelve months or less on our condensed consolidated balance sheet. Adoption of the new standard resulted in the recording of lease ROU assets and lease liabilities of approximately $195,000 and $163,000, respectively, as of October 1, 2019. The standard did not materially impact our consolidated results from operations and had no impact on our cash flows upon adoption. However, within the third quarter of fiscal 2020, we expect to record an additional $5.0 million of ROU assets and lease liabilities upon the commencement of our new SiC/LED building lease. Refer to Note 3 to the Condensed Consolidated Financial Statements for further information regarding Topic 842. There have been no other material changes or additions to the recently issued accounting standards other than those previously reported in Note 1 to our Consolidated Financial Statements in Part II, Item 8 of our Annual Report on Form 10-K for the year ended September 30, 2019 that affect or may affect our consolidated financial statements. Recent Developments – COVID-19 On January 30, 2020 the World Health Organization declared an outbreak of a highly contagious form of an upper respiratory infection caused by COVID-19, a novel coronavirus strain commonly referred to as “coronavirus”. Amtech determined as a key supplier to essential businesses we were allowed to remain open and continue to supply our products and services in the geographic areas in U.S. in which we operate; however, federal and local guidelines and restrictions have significantly curtailed the level of economic activity in affected areas, which include the areas in which we conduct our business. See additional information in “Item 2: Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Item 1a. Risk Factors”.

Contracts with Customers

Contracts with Customers	6 Months Ended
	Mar. 31, 2020
Revenue From Contract With Customer [Abstract]
Contracts with Customers	2. Contracts with Customers The components of contract assets, which are included in other current assets in our condensed consolidated balance sheets, are as follows, in thousands: March 31, 2020 September 30, 2019 Unbilled accounts receivable $ — $ 36 Contract assets $ — $ 36 The components of contract liabilities are as follows, in thousands: March 31, 2020 September 30, 2019 Customer deposits $ 1,532 $ 1,378 Contract liabilities $ 1,532 $ 1,378

Leases

Leases	6 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Leases	3. Leases We lease office space, buildings, land, vehicles and equipment. Lease agreements with an initial term of 12 months or less are not recorded on the balance sheet. Instead, we recognize the lease expense as incurred over the lease term. Certain lease agreements include one or more options to renew, with renewal terms that can extend the lease term from one to five years. The exercise of lease renewal options is at our sole discretion. Some agreements also include options to purchase the leased property. The estimated life of assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise. Our lease agreements do not contain any material residual value guarantees or material restrictive covenants. Significant Accounting Policy We determine if a contract or arrangement is, or contains, a lease at inception. Balances related to operating leases are included in other assets in our condensed consolidated balance sheet. Balances related to financing leases are immaterial and are included in property and equipment, other current liabilities, and long-term lease liability in our condensed consolidated balance sheet. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As none of our leases provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The ROU asset includes any prepaid lease payments and additional direct costs and excludes lease incentives. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. The following table provides information about the financial statement classification of our lease balances reported within the condensed consolidated balance sheets as of March 31, 2020 and October 1, 2019, in thousands: March 31, 2020 October 1, 2019 Assets Operating lease assets $ 32 $ 146 Finance lease assets 36 49 Total lease assets $ 68 $ 195 Liabilities Current Operating lease liabilities $ 14 $ 99 Finance lease liabilities 19 22 Non-current Operating lease liabilities 11 15 Finance lease liabilities 18 27 Total lease liabilities $ 62 $ 163 The following table provides information about the financial statement classification of our lease expenses reported in the condensed consolidated statements of operations for the three and six months ended March 31, 2020, in thousands: Lease cost Classification Three Months Ended March 31, 2020 Six Months Ended March 31, 2020 Operating lease cost Selling, general and administrative expenses $ 39 $ 115 Finance lease cost Selling, general and administrative expenses 8 15 Total lease cost $ 47 $ 130 Future minimum lease payments under non-cancelable leases, including leases that are executed but not yet effective, as of March 31, 2020 are as follows, in thousands: Operating leases Finance Leases Total Remainder of 2020 $ 73 $ 11 $ 84 2021 314 12 326 2022 313 7 320 2023 313 7 320 2024 311 2 313 Thereafter 7,264 — 7,264 Total lease payments 8,588 39 8,627 Less: Interest 3,442 2 3,444 Present value of lease liabilities 5,146 37 $ 5,183 Operating lease payments include $0 related to options to extend lease terms that are reasonably certain of being exercised. The following table provides information about the remaining lease terms and discount rates applied as of March 31, 2020: March 31, 2020 Weighted average remaining lease term (years) Operating leases 24.52 Finance leases 2.84 Weighted average discount rate (%) Operating leases 4.17 Finance leases 4.17

Assets Held for Sale, Discontin

Assets Held for Sale, Discontinued Operations and Disposals	6 Months Ended
	Mar. 31, 2020
Discontinued Operations And Disposal Groups [Abstract]
Assets Held for Sale, Discontinued Operations and Disposals	4. Assets Held for Sale, Discontinued Operations and Disposals In April 2019, we announced that our Board of Directors (the “Board”) determined that it was in the long-term best interest of the Company to exit the solar business segment and focus our strategic efforts on our semiconductor and silicon carbide/polishing business segments in order to more fully realize the opportunities the Company believes are presented in those areas. The anticipated divestitures of our solar business included our Tempress and SoLayTec subsidiaries, which comprised substantially all of our Solar segment. We adopted a plan to sell our Solar operations on or before March 31, 2020. As such, we classified substantially all of the Solar segment as held for sale in our Condensed Consolidated Balance Sheets and reported its results as discontinued operations in our Condensed Consolidated Statements of Operations. On June 7, 2019 (“SoLayTec Sale Date”), we completed the sale of our subsidiary, SoLayTec, to a third party located in the Netherlands. Upon the sale, we recognized a gain of approximately $1.6 million, which we reported as gain on sale of subsidiary in our Consolidated Statements of Operations for the three months ended June 30, 2019. Effective on the SoLayTec Sale Date, SoLayTec is no longer included in our consolidated financial statements. SoLayTec was not material to Amtech’s results of operations or financial position. On December 13, 2019 (“R2D Sale Date”), we finalized the sale of our subsidiary, R2D Automation SAS (“R2D”), to certain members of R2D’s management team. Upon the sale, we recognized a loss of approximately $2.8 million, which we reported as loss on sale of subsidiary in our Condensed Consolidated Statements of Operations for the six months ended March 31, 2020. Effective on the R2D Sale Date, R2D is no longer included in our consolidated financial statements. R2D does not meet the discontinued operations or held-for-sale criteria and is not material to Amtech’s results of operations or financial position. Effective January 22, 2020 (“Tempress Sale Date”), we completed the sale of our subsidiary, Tempress Group Holding B.V. (“Tempress”) for nominal consideration to a third party located in the Netherlands. In connection with this sale transaction, we provided an unsecured term loan to Tempress in the principal sum of $2.25 million, to be used to fund Tempress’ working capital requirements and to facilitate the restructuring of Tempress’ operations. To date, we have received repayment of $0.5 million of the loan balance. We have forgiven $0.5 million of the loan in accordance with the terms of the loan agreement and expect the remaining $1.25 million to be paid in the next 12 months. Therefore, we have recorded the note receivable within current assets on our Condensed Consolidated Balance Sheet as of March 31, 2020. We recorded a pre-tax loss on deconsolidation of approximately $10.9 million, of which approximately $7.2 million was the recognition of previously recorded accumulated foreign currency translation losses. The total pre-tax loss does not have a material effect on our cash balances at our continuing operations. We also recognized a significant tax benefit relating to this loss, which can be carried over to future years. Effective on the Tempress Sale Date, Tempress is no longer included in our consolidated financial statements. Operating results of our discontinued solar operations were as follows, in thousands: Three Months Ended March 31, Six Months Ended March 31, 2020 2019 2020 2019 Revenues, net of returns and allowances $ 2,155 $ 8,153 $ 7,442 $ 14,381 Cost of sales 1,830 9,229 5,969 15,352 Gross profit (loss) 325 (1,076 ) 1,473 (971 ) Selling, general and administrative 476 4,082 1,814 5,677 Research, development and engineering 91 831 540 1,911 Restructuring charges 37 591 37 601 Operating loss (279 ) (6,580 ) (918 ) (9,160 ) Loss on sale of subsidiary (10,916 ) — (10,916 ) — Interest expense and other, net (22 ) (48 ) (29 ) (70 ) Loss from discontinued operations before income taxes (11,217 ) (6,628 ) (11,863 ) (9,230 ) Income tax (benefit) provision (66 ) 19 (47 ) 37 Net loss from discontinued operations, net of tax $ (11,151 ) $ (6,647 ) $ (11,816 ) $ (9,267 ) The following table presents a summary of the solar assets and liabilities held for sale included in our Condensed Consolidated Balance Sheets, in thousands: Assets September 30, 2019 Total current assets $ 17,591 Property, plant and equipment - net 5,164 Total assets included in the disposal group 22,755 Total current liabilities 18,272 Long-term debt 275 Total liabilities included in the disposal group 18,547 Net assets included in the disposal group $ 4,208 Amtech’s Condensed Consolidated Statements of Cash Flows combines cash flows from discontinued operations with cash flows from continuing operations within each cash flow statement category. The following table summarizes selected cash flow information for discontinued operations, in thousands: Six Months Ended March 31, 2020 2019 Loss from discontinued operations, net of tax $ (11,816 ) $ (9,267 ) Depreciation and amortization $ 180 $ 287 (Reversal of) provision for allowance for doubtful accounts, net $ (66 ) $ 981 Purchases of property, plant and equipment $ 1 $ 96

Earnings Per Share

Earnings Per Share	6 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Share	5. Earnings Per Share Basic earnings per share (“EPS”) is computed by dividing net income (loss) by the weighted average number of common shares outstanding for the period. Diluted EPS is computed similarly to basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding if potentially dilutive common shares had been issued. In the case of a net loss, diluted earnings per share is calculated in the same manner as basic EPS. For the three and six months ended March 31, 2020, options for 641,000 and 690,000 weighted average shares, respectively, were excluded from the diluted EPS calculations because they were anti-dilutive. For the three and six months ended March 31, 2019, options for 1,248,000 and 1,220,000 weighted average shares, respectively, were excluded from the diluted EPS calculations because they were anti-dilutive. These shares could become dilutive in the future. A reconciliation of the denominators of the basic and diluted EPS calculations follows (in thousands, except per share amounts): Three Months Ended March 31, Six Months Ended March 31, 2020 2019 2020 2019 Numerator: Net (loss) income from continuing operations $ (543 ) $ 1,012 $ (1,810 ) $ 1,260 Net loss from discontinued operations $ (11,151 ) $ (6,647 ) $ (11,816 ) $ (9,267 ) Net loss $ (11,694 ) $ (5,635 ) $ (13,626 ) $ (8,007 ) Denominator: Weighted-average shares used to compute basic EPS 14,150 14,228 14,193 14,224 Common stock equivalents (1) — 30 — 31 Weighted-average shares used to compute diluted EPS 14,150 14,258 14,193 14,255 Basic (loss) income per share from continuing operations $ (0.04 ) $ 0.07 $ (0.13 ) $ 0.09 Basic loss per share from discontinued operations $ (0.79 ) $ (0.47 ) $ (0.83 ) $ (0.65 ) Net loss per basic share $ (0.83 ) $ (0.40 ) $ (0.96 ) $ (0.56 ) Diluted (loss) income per share from continuing operations $ (0.04 ) $ 0.07 $ (0.13 ) $ 0.09 Diluted loss per share from discontinued operations $ (0.79 ) $ (0.47 ) $ (0.83 ) $ (0.65 ) Net loss per diluted share $ (0.83 ) $ (0.40 ) $ (0.96 ) $ (0.56 ) (1) The number of common stock equivalents is calculated using the treasury method and the average market price during the period.

Inventory

Inventory	6 Months Ended
	Mar. 31, 2020
Inventory Disclosure [Abstract]
Inventory	6. Inventory The components of inventories are as follows, in thousands: March 31, 2020 September 30, 2019 Purchased parts and raw materials $ 14,200 $ 15,192 Work-in-process 4,215 4,215 Finished goods 3,361 3,183 21,776 22,590 Excess and obsolete reserves (4,444 ) (5,058 ) $ 17,332 $ 17,532

Equity and Stock-Based Compensa

Equity and Stock-Based Compensation	6 Months Ended
	Mar. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity and Stock-Based Compensation	7. Equity and Stock-Based Compensation Stock-based compensation expense was less than $0.1 million and $0.2 million for the three months ended March 31, 2020 and 2019, respectively, and was $0.1 million and $0.4 million in the six months ended March 31, 2020 and 2019, respectively. Stock-based compensation expense is included in selling, general and administrative expenses. The following table summarizes our stock option activity during the six months ended March 31, 2020: Options Weighted Average Exercise Price Outstanding at beginning of period 1,068,665 $ 7.04 Granted 32,500 5.34 Exercised (138,525 ) 5.63 Forfeited (87,431 ) 6.67 Outstanding at end of period 875,209 $ 7.23 Exercisable at end of period 759,420 $ 7.48 Weighted average fair value of options granted during the period $ 2.89 The fair value of options was estimated at the applicable grant date using the Black-Scholes option pricing model with the following assumptions: Six Months Ended March 31, 2020 Risk free interest rate 1 % Expected life 6 years Dividend rate — % Volatility 58 % On November 29, 2018, we announced that our Board approved a stock repurchase program, pursuant to which we may repurchase up to $4 million of our outstanding common stock, par value $0.01 per share (“Common Stock”), over a one-year On February 4, 2020, the Board approved a new stock repurchase program, pursuant to which the Company may repurchase up to $4 million of its outstanding Common Stock over a one-year

Income Taxes

Income Taxes	6 Months Ended
	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	8. Income Taxes For the three months ended March 31, 2020 and 2019, we recorded income tax expense at our continuing operations of $0.2 million and $0.3 million, respectively. For the six months ended March 31, 2020 and 2019, we recorded income tax expense of $0.2 million and $0.9 million, respectively. In the three months ended March 31, 2020 and 2019, we recorded income tax benefit of $0.1 million and income tax expense of $19,000, respectively, in our discontinued operations. In the six months ended March 31, 2020 and 2019, we recorded income tax benefit of $47,000 and income tax expense of $37,000, respectively, in our discontinued operations. The quarterly income tax provision is calculated using an estimated annual effective tax rate, based upon expected annual income, permanent items, statutory rates and planned tax strategies in the various jurisdictions in which we operate. However, losses in certain jurisdictions and discrete items are treated separately. Deferred tax assets and liabilities reflect the tax effects of temporary differences between the carrying value of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. We record a valuation allowance if, based on the weight of available evidence, it is more likely than not that some portion or all of a deferred tax asset will not be realized. Our expectations regarding realization of our deferred tax assets is based upon the weight of all available evidence, including such factors as our recent earnings history, expected future taxable income and available tax planning strategies. We established valuation allowances on substantially all net deferred tax assets, after considering all of the available objective evidence, both positive and negative, historical and prospective, with greater weight given to historical evidence, and determined it is not more likely than not that these assets will be realized. We will continue to monitor our cumulative income and loss positions in the U.S. and foreign jurisdictions to determine whether full valuation allowances on net deferred tax assets are appropriate. We classify all of our uncertain tax positions as income taxes payable long-term. At March 31, 2020 and September 30, 2019, the total amount of unrecognized tax benefits was approximately $1.2 million and $1.3 million, respectively. Income taxes payable long-term includes other items, primarily withholding taxes that are not due until the related intercompany service fees are paid. We classify interest and penalties related to unrecognized tax benefits as income tax expense. As of both March 31, 2020 and September 30, 2019, we had an accrual for potential interest and penalties of approximately $0.8 million classified with income taxes payable long-term. Amtech and one or more of our subsidiaries file income tax returns in China and other foreign jurisdictions, as well as in the U.S. and various states in the U.S. We have not signed any agreements with the Internal Revenue Service, any state or foreign jurisdiction to extend the statute of limitations for any fiscal year. As such, the number of open years is the number of years dictated by statute in each of the respective taxing jurisdictions, which generally is from 3 to 5 years.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Mar. 31, 2020
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	9. Commitments and Contingencies Purchase Obligations – As of March 31, 2020, we had unrecorded purchase obligations at our continuing operations in the amount of $8.8 million compared to $4.4 million as of September 30, 2019. This increase was primarily the result of COVID-19 related closures throughout the second quarter of 2020. These purchase obligations consist of outstanding purchase orders for goods and services. While the amount represents purchase agreements, the actual amounts to be paid may be less in the event that any agreements are renegotiated, canceled or terminated. Legal Proceedings and Other Claims – From time to time, we are a party to claims and actions for matters arising out of our business operations. We regularly evaluate the status of the legal proceedings and other claims in which we are involved to assess whether a loss is probable or there is a reasonable possibility that a loss, or an additional loss, may have been incurred and determine if accruals are appropriate. If accruals are not appropriate, we further evaluate each legal proceeding to assess whether an estimate of possible loss or range of possible loss can be made for disclosure. Although the outcome of claims and litigation is inherently unpredictable, we believe that we have adequate provisions for any probable and estimable losses. It is possible, nevertheless, that our consolidated financial position, results of operations or liquidity could be materially and adversely affected in any particular period by the resolution of a claim or legal proceeding. Legal expenses related to defense, negotiations, settlements, rulings and advice of outside legal counsel are expensed as incurred. Employment Contracts and Change in Control Agreements – We have employment contracts and change in control agreements with, and severance plans covering, certain officers and management employees under which severance payments would become payable in the event of specified terminations without cause or terminations under certain circumstances after a change in control. If severance payments under the current employment contracts or severance plans were to become payable, the severance payments would generally range from twelve to thirty-six months of salary.

Business Segments Information

Business Segments Information	6 Months Ended
	Mar. 31, 2020
Segment Reporting [Abstract]
Business Segment Information	10. Business Segment Information After announcing the planned divestiture of our Solar segment (see Note 4), we conducted an evaluation of our organizational structure. Beginning with the second quarter of fiscal 2019, we made changes to our reportable segments. With the divesture of our Automation segment in the first quarter of fiscal 2020, we further evaluated our organizational structure and concluded that we have two reportable business segments following the divestiture. Prior period amounts have been revised to conform to the current period segment reporting structure. Our two reportable segments are as follows: Semiconductor – We design, manufacture, sell and service thermal processing equipment and related controls for use by leading semiconductor manufacturers, and in electronics, automotive and other industries. SiC/LED – We produce consumables and machinery for lapping (fine abrading) and polishing of materials, such as silicon and silicon carbide substrates, sapphire substrates, optical components, numerous types of crystalline materials, ceramics and metal components. We formerly referred to our SiC/LED segment as “Polishing.” Information concerning our business segments is as follows, in thousands: Three Months Ended March 31, Six Months Ended March 31, 2020 2019 2020 2019 Net Revenues: Semiconductor $ 11,992 $ 16,053 $ 29,224 $ 35,013 SiC/LED 2,468 3,273 5,285 6,256 Non-segment related — 1,307 643 2,589 $ 14,460 $ 20,633 $ 35,152 $ 43,858 Operating income (loss): Semiconductor $ (18 ) $ 1,732 $ 2,704 $ 4,477 SiC/LED 421 877 955 1,646 Non-segment related (1,375 ) (1,361 ) (2,994 ) (4,211 ) $ (972 ) $ 1,248 $ 665 $ 1,912 March 31, 2020 September 30, 2019 Identifiable Assets: Semiconductor $ 55,337 $ 56,855 SiC/LED 8,253 7,779 Non-segment related* 36,008 39,088 Held-for-sale assets** — 22,755 $ 99,598 $ 126,477 * Non-segment related assets include cash, property and other assets. ** See Note 4 for additional information on held-for-sale assets. Goodwill and other long-lived assets We review our long-lived assets, including goodwill, for impairment at least annually in our fourth quarter or whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Additional information on impairment testing of long-lived assets, intangible assets and goodwill can be found in Notes 1 and 10 of our Annual Report on Form 10-K for the year ended September 30, 2019.

Major Customers and Foreign Sal

Major Customers and Foreign Sales	6 Months Ended
	Mar. 31, 2020
Geographic Areas Revenues From External Customers [Abstract]
Major Customers and Foreign Sales	11. Major Customers and Foreign Sales During the six months ended March 31, 2020, no customer represented greater than 10% of net revenues. During the six months ended March 31, 2019, one Semiconductor segment customer individually represented 11% of our net revenues. Our net revenues were from customers in the following geographic regions: Six Months Ended March 31, 2020 2019 United States 34 % 40 % Other 6 % 2 % Total North America 40 % 42 % China 24 % 19 % Malaysia 4 % 3 % Taiwan 11 % 6 % Other 7 % 7 % Total Asia 46 % 35 % Germany 3 % 11 % Other 11 % 12 % Total Europe 14 % 23 % 100 % 100 %

Basis of Presentation and Sig_2

Basis of Presentation and Significant Accounting Policies (Policies)	6 Months Ended
	Mar. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Operations and Basis of Presentation	Nature of Operations and Basis of Presentation – Amtech Systems, Inc. (the “Company,” “Amtech,” “we,” “our” or “us”) is a leading, global manufacturer of capital equipment, including thermal processing and wafer polishing, and related consumables used in fabricating semiconductor devices, such as silicon carbide (SiC) and silicon power chips, electronic assemblies and light-emitting diodes (LEDs). We sell these products to semiconductor and automotive component manufacturers worldwide, particularly in Asia, North America and Europe. We serve niche markets in industries that are experiencing technological advances and which historically have been very cyclical. Therefore, our future profitability and growth depend on our ability to develop or acquire and market profitable new products and on our ability to adapt to cyclical trends. In the second quarter of fiscal 2019, we began the process to divest our solar business. As such, we have classified substantially all of the Solar segment as held for sale in our Condensed Consolidated Balance Sheets and reported its results as discontinued operations in our Condensed Consolidated Statements of Operations. These divestitures were completed in the second quarter of fiscal 2020. For additional information on the divestitures, see Note 4. For additional information on our segments, see Note 10. The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”), and consequently do not include all disclosures normally required by accounting principles generally accepted in the United States of America. In the opinion of management, the accompanying unaudited interim condensed consolidated financial statements contain all adjustments necessary, all of which are of a normal and recurring nature, to present fairly our financial position, results of operations and cash flows. Certain information and note disclosures normally included in financial statements have been condensed or omitted pursuant to the rules and regulations of the SEC. The condensed balance sheet at September 30, 2019, has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended September 30, 2019. Our fiscal year is from October 1 to September 30. Unless otherwise stated, references to the years 2020 and 2019 relate to the fiscal years ended September 30, 2020 and 2019, respectively. The consolidated results of operations for the three and six months ended March 31, 2020, are not necessarily indicative of the results to be expected for the full fiscal year.
Principles of Consolidation	Principles of Consolidation – The consolidated financial statements include the accounts of the Company and our wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates – The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.
Reclassifications	Reclassifications – Certain reclassifications have been made to prior year financial statements to conform to the current year presentation. Results for all periods presented in this report have been reclassified for changes to our reportable segments (Note 10). These reclassifications had no effect on the previously reported consolidated financial statements for any period.
Divestitures	Divestitures – Significant accounting policies associated with a decision to dispose of a business are discussed below: Discontinued Operations – A business is classified as discontinued operations if the disposal represents a strategic shift that will have a major effect on operations or financial results and meets the criteria to be classified as held for sale or is disposed of by sale or otherwise. Significant judgments are involved in determining whether a business meets the criteria for discontinued operations reporting and the period in which these criteria are met. If a business is reported as a discontinued operation, the results of operations through the date of sale, including any gain or loss recognized on the disposition, are presented on a separate line of the Condensed Consolidated Statements of Operations. Interest on debt directly attributable to the discontinued operation is allocated to discontinued operations. Assets Held for Sale – An asset or business is classified as held for sale when (i) management commits to a plan to sell and it is actively marketed; (ii) it is available for immediate sale and the sale is expected to be completed within one year; and (iii) it is unlikely significant changes to the plan will be made or that the plan will be withdrawn. In isolated instances, assets held for sale may exceed one year due to events or circumstances beyond our control. The assets and related liabilities are aggregated and reported on separate lines of the Condensed Consolidated Balance Sheets.
Shipping Expense	Shipping Expense – Shipping expenses of $0.1 million and $0.2 million in each of the three months ended March 31, 2020 and 2019, respectively, and $0.3 million and $0.5 million for the six months ended March 31, 2020 and 2019, respectively, are included in selling, general and administrative expenses.
Research, Development and Engineering Expenses	Research, Development and Engineering Expense – The table below shows gross research and development expenses and grants earned, in thousands: Three Months Ended March 31, Six Months Ended March 31, 2020 2019 2020 2019 Research, development and engineering $ 1,017 $ 713 $ 1,780 $ 1,579 Grants earned (102 ) — (243 ) — Net research, development and engineering $ 915 $ 713 $ 1,537 $ 1,579
Concentrations of Credit Risk	Concentrations of Credit Risk – Our customers consist primarily of semiconductor manufacturers worldwide, as well as the lapping and polishing marketplace. Financial instruments that potentially subject us to significant concentrations of credit risk consist principally of cash and trade accounts receivable. Credit risk is managed by performing ongoing credit evaluations of the customers’ financial condition, by requiring significant deposits where appropriate, and by actively monitoring collections. Letters of credit are required of certain customers depending on the size of the order, type of customer or its creditworthiness, and country of domicile. As of March 31, 2020, one Semiconductor segment customer individually represented 10% of accounts receivable. As of September 30, 2019, one Semiconductor customer individually represented 15% of accounts receivable. We maintain our cash, cash equivalents and restricted cash in multiple financial institutions. Balances in the United States, which account for approximately 86% and 79% of total cash balances at our continuing operations as of March 31, 2020 and September 30, 2019, respectively, are primarily invested in U.S. Treasuries or are in financial institutions insured by the Federal Deposit Insurance Corporation (“FDIC”). The remainder of our cash is maintained with financial institutions with reputable credit ratings in China, the United Kingdom, Singapore and Malaysia. We maintain cash in bank accounts in amounts which at times may exceed federally insured limits. We have not experienced any losses on such accounts. Refer to Note 11 to Condensed Consolidated Financial Statements for information regarding major customers, foreign sales and revenue in other countries subject to fluctuation in foreign currency exchange rates.
Impact of Recently Issued Accounting Pronouncements	Impact of Recently Issued Accounting Pronouncements Effective October 1, 2019, we adopted the Financial Accounting Standards Board’s (“FASB”) Accounting Standard Update (“ASU”) No. 2016-02—Leases (Topic 842), using the retrospective cumulative effect adjustment transition method. We elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed us to carry forward the historical lease classification. In addition, we made an accounting policy election not to separate non-lease components from lease components for all existing classes of underlying assets with the exception of land and buildings. We also made an accounting policy election to not record right of use (“ROU”) assets and lease liabilities for leases with an initial term of twelve months or less on our condensed consolidated balance sheet. Adoption of the new standard resulted in the recording of lease ROU assets and lease liabilities of approximately $195,000 and $163,000, respectively, as of October 1, 2019. The standard did not materially impact our consolidated results from operations and had no impact on our cash flows upon adoption. However, within the third quarter of fiscal 2020, we expect to record an additional $5.0 million of ROU assets and lease liabilities upon the commencement of our new SiC/LED building lease. Refer to Note 3 to the Condensed Consolidated Financial Statements for further information regarding Topic 842. There have been no other material changes or additions to the recently issued accounting standards other than those previously reported in Note 1 to our Consolidated Financial Statements in Part II, Item 8 of our Annual Report on Form 10-K for the year ended September 30, 2019 that affect or may affect our consolidated financial statements.
Recent Developments – COVID-19	Recent Developments – COVID-19 On January 30, 2020 the World Health Organization declared an outbreak of a highly contagious form of an upper respiratory infection caused by COVID-19, a novel coronavirus strain commonly referred to as “coronavirus”. Amtech determined as a key supplier to essential businesses we were allowed to remain open and continue to supply our products and services in the geographic areas in U.S. in which we operate; however, federal and local guidelines and restrictions have significantly curtailed the level of economic activity in affected areas, which include the areas in which we conduct our business. See additional information in “Item 2: Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Item 1a. Risk Factors”.
Significant Accounting Policy	Significant Accounting Policy We determine if a contract or arrangement is, or contains, a lease at inception. Balances related to operating leases are included in other assets in our condensed consolidated balance sheet. Balances related to financing leases are immaterial and are included in property and equipment, other current liabilities, and long-term lease liability in our condensed consolidated balance sheet. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As none of our leases provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The ROU asset includes any prepaid lease payments and additional direct costs and excludes lease incentives. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option.

Basis of Presentation and Sig_3

Basis of Presentation and Significant Accounting Policies (Tables)	6 Months Ended
	Mar. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Summary of Research, Development and Engineering Expense	The table below shows gross research and development expenses and grants earned, in thousands: Three Months Ended March 31, Six Months Ended March 31, 2020 2019 2020 2019 Research, development and engineering $ 1,017 $ 713 $ 1,780 $ 1,579 Grants earned (102 ) — (243 ) — Net research, development and engineering $ 915 $ 713 $ 1,537 $ 1,579

Contracts with Customers (Table

Contracts with Customers (Tables)	6 Months Ended
	Mar. 31, 2020
Revenue From Contract With Customer [Abstract]
Contract with Customer, Asset and Liability	The components of contract assets, which are included in other current assets in our condensed consolidated balance sheets, are as follows, in thousands: March 31, 2020 September 30, 2019 Unbilled accounts receivable $ — $ 36 Contract assets $ — $ 36 The components of contract liabilities are as follows, in thousands: March 31, 2020 September 30, 2019 Customer deposits $ 1,532 $ 1,378 Contract liabilities $ 1,532 $ 1,378

Leases (Tables)

Leases (Tables)	6 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Schedule of Financial Statement Classification of Lease Balances With Condensed Consolidated Balance Sheet	The following table provides information about the financial statement classification of our lease balances reported within the condensed consolidated balance sheets as of March 31, 2020 and October 1, 2019, in thousands: March 31, 2020 October 1, 2019 Assets Operating lease assets $ 32 $ 146 Finance lease assets 36 49 Total lease assets $ 68 $ 195 Liabilities Current Operating lease liabilities $ 14 $ 99 Finance lease liabilities 19 22 Non-current Operating lease liabilities 11 15 Finance lease liabilities 18 27 Total lease liabilities $ 62 $ 163
Schedule of Financial Statement Classification of Lease Balances in Condensed Consolidated Statement of Operations	The following table provides information about the financial statement classification of our lease expenses reported in the condensed consolidated statements of operations for the three and six months ended March 31, 2020, in thousands: Lease cost Classification Three Months Ended March 31, 2020 Six Months Ended March 31, 2020 Operating lease cost Selling, general and administrative expenses $ 39 $ 115 Finance lease cost Selling, general and administrative expenses 8 15 Total lease cost $ 47 $ 130
Schedule of Future Minimum Lease Payments Under Non-cancelable Leases Including Leases	Future minimum lease payments under non-cancelable leases, including leases that are executed but not yet effective, as of March 31, 2020 are as follows, in thousands: Operating leases Finance Leases Total Remainder of 2020 $ 73 $ 11 $ 84 2021 314 12 326 2022 313 7 320 2023 313 7 320 2024 311 2 313 Thereafter 7,264 — 7,264 Total lease payments 8,588 39 8,627 Less: Interest 3,442 2 3,444 Present value of lease liabilities 5,146 37 $ 5,183
Schedule of Weighted Average Remaining Term and Discount Rates	The following table provides information about the remaining lease terms and discount rates applied as of March 31, 2020: March 31, 2020 Weighted average remaining lease term (years) Operating leases 24.52 Finance leases 2.84 Weighted average discount rate (%) Operating leases 4.17 Finance leases 4.17

Assets Held for Sale, Discont_2

Assets Held for Sale, Discontinued Operations and Disposals (Tables)	6 Months Ended
	Mar. 31, 2020
Discontinued Operations And Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations	Operating results of our discontinued solar operations were as follows, in thousands: Three Months Ended March 31, Six Months Ended March 31, 2020 2019 2020 2019 Revenues, net of returns and allowances $ 2,155 $ 8,153 $ 7,442 $ 14,381 Cost of sales 1,830 9,229 5,969 15,352 Gross profit (loss) 325 (1,076 ) 1,473 (971 ) Selling, general and administrative 476 4,082 1,814 5,677 Research, development and engineering 91 831 540 1,911 Restructuring charges 37 591 37 601 Operating loss (279 ) (6,580 ) (918 ) (9,160 ) Loss on sale of subsidiary (10,916 ) — (10,916 ) — Interest expense and other, net (22 ) (48 ) (29 ) (70 ) Loss from discontinued operations before income taxes (11,217 ) (6,628 ) (11,863 ) (9,230 ) Income tax (benefit) provision (66 ) 19 (47 ) 37 Net loss from discontinued operations, net of tax $ (11,151 ) $ (6,647 ) $ (11,816 ) $ (9,267 ) The following table presents a summary of the solar assets and liabilities held for sale included in our Condensed Consolidated Balance Sheets, in thousands: Assets September 30, 2019 Total current assets $ 17,591 Property, plant and equipment - net 5,164 Total assets included in the disposal group 22,755 Total current liabilities 18,272 Long-term debt 275 Total liabilities included in the disposal group 18,547 Net assets included in the disposal group $ 4,208 Six Months Ended March 31, 2020 2019 Loss from discontinued operations, net of tax $ (11,816 ) $ (9,267 ) Depreciation and amortization $ 180 $ 287 (Reversal of) provision for allowance for doubtful accounts, net $ (66 ) $ 981 Purchases of property, plant and equipment $ 1 $ 96

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Reconciliation of Denominators of Basic and Diluted EPS Calculations	A reconciliation of the denominators of the basic and diluted EPS calculations follows (in thousands, except per share amounts): Three Months Ended March 31, Six Months Ended March 31, 2020 2019 2020 2019 Numerator: Net (loss) income from continuing operations $ (543 ) $ 1,012 $ (1,810 ) $ 1,260 Net loss from discontinued operations $ (11,151 ) $ (6,647 ) $ (11,816 ) $ (9,267 ) Net loss $ (11,694 ) $ (5,635 ) $ (13,626 ) $ (8,007 ) Denominator: Weighted-average shares used to compute basic EPS 14,150 14,228 14,193 14,224 Common stock equivalents (1) — 30 — 31 Weighted-average shares used to compute diluted EPS 14,150 14,258 14,193 14,255 Basic (loss) income per share from continuing operations $ (0.04 ) $ 0.07 $ (0.13 ) $ 0.09 Basic loss per share from discontinued operations $ (0.79 ) $ (0.47 ) $ (0.83 ) $ (0.65 ) Net loss per basic share $ (0.83 ) $ (0.40 ) $ (0.96 ) $ (0.56 ) Diluted (loss) income per share from continuing operations $ (0.04 ) $ 0.07 $ (0.13 ) $ 0.09 Diluted loss per share from discontinued operations $ (0.79 ) $ (0.47 ) $ (0.83 ) $ (0.65 ) Net loss per diluted share $ (0.83 ) $ (0.40 ) $ (0.96 ) $ (0.56 ) (1) The number of common stock equivalents is calculated using the treasury method and the average market price during the period.

Inventory (Tables)

Inventory (Tables)	6 Months Ended
	Mar. 31, 2020
Inventory Disclosure [Abstract]
Schedule of Components of Inventories	The components of inventories are as follows, in thousands: March 31, 2020 September 30, 2019 Purchased parts and raw materials $ 14,200 $ 15,192 Work-in-process 4,215 4,215 Finished goods 3,361 3,183 21,776 22,590 Excess and obsolete reserves (4,444 ) (5,058 ) $ 17,332 $ 17,532

Equity and Stock-Based Compen_2

Equity and Stock-Based Compensation (Tables)	6 Months Ended
	Mar. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Stock Option Activity	The following table summarizes our stock option activity during the six months ended March 31, 2020: Options Weighted Average Exercise Price Outstanding at beginning of period 1,068,665 $ 7.04 Granted 32,500 5.34 Exercised (138,525 ) 5.63 Forfeited (87,431 ) 6.67 Outstanding at end of period 875,209 $ 7.23 Exercisable at end of period 759,420 $ 7.48 Weighted average fair value of options granted during the period $ 2.89
Schedule of Fair Value of Stock Option Using Black-Scholes Option Pricing Model	The fair value of options was estimated at the applicable grant date using the Black-Scholes option pricing model with the following assumptions: Six Months Ended March 31, 2020 Risk free interest rate 1 % Expected life 6 years Dividend rate — % Volatility 58 %

Business Segments Information (

Business Segments Information (Tables)	6 Months Ended
	Mar. 31, 2020
Segment Reporting [Abstract]
Schedule of Business Segment Information	Information concerning our business segments is as follows, in thousands: Three Months Ended March 31, Six Months Ended March 31, 2020 2019 2020 2019 Net Revenues: Semiconductor $ 11,992 $ 16,053 $ 29,224 $ 35,013 SiC/LED 2,468 3,273 5,285 6,256 Non-segment related — 1,307 643 2,589 $ 14,460 $ 20,633 $ 35,152 $ 43,858 Operating income (loss): Semiconductor $ (18 ) $ 1,732 $ 2,704 $ 4,477 SiC/LED 421 877 955 1,646 Non-segment related (1,375 ) (1,361 ) (2,994 ) (4,211 ) $ (972 ) $ 1,248 $ 665 $ 1,912 March 31, 2020 September 30, 2019 Identifiable Assets: Semiconductor $ 55,337 $ 56,855 SiC/LED 8,253 7,779 Non-segment related* 36,008 39,088 Held-for-sale assets** — 22,755 $ 99,598 $ 126,477 * Non-segment related assets include cash, property and other assets. ** See Note 4 for additional information on held-for-sale assets.

Major Customers and Foreign S_2

Major Customers and Foreign Sales (Tables)	6 Months Ended
	Mar. 31, 2020
Geographic Areas Revenues From External Customers [Abstract]
Schedule of Revenues by Geographic Region	Our net revenues were from customers in the following geographic regions: Six Months Ended March 31, 2020 2019 United States 34 % 40 % Other 6 % 2 % Total North America 40 % 42 % China 24 % 19 % Malaysia 4 % 3 % Taiwan 11 % 6 % Other 7 % 7 % Total Asia 46 % 35 % Germany 3 % 11 % Other 11 % 12 % Total Europe 14 % 23 % 100 % 100 %

Basis of Presentation and Sig_4

Basis of Presentation and Significant Accounting Policies - Shipping Expense - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Schedule Of Expense [Line Items]
Selling, general and administrative expenses	$ 5,415	$ 5,793	$ 11,330	$ 12,419
Shipping
Schedule Of Expense [Line Items]
Selling, general and administrative expenses	$ 100	$ 200	$ 300	$ 500

Basis of Presentation and Sig_5

Basis of Presentation and Significant Accounting Policies - Summary of Research, Development and Engineering Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Research, development and engineering	$ 1,017	$ 713	$ 1,780	$ 1,579
Grants earned	(102)		(243)
Net research, development and engineering	$ 915	$ 713	$ 1,537	$ 1,579

Basis of Presentation and Sig_6

Basis of Presentation and Significant Accounting Policies - Concentrations of Credit Risk - Additional Information (Details)	6 Months Ended	12 Months Ended
	Mar. 31, 2020	Sep. 30, 2019
US Treasuries and FDIC Insured
Concentration Risk [Line Items]
Percentage of cash balances	86.00%	79.00%
Customer One | Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%	15.00%

Basis of Presentation and Sig_7

Basis of Presentation and Significant Accounting Policies - Impact of Recently Issued Accounting Pronouncements - Additional Information (Details) - USD ($)	Jun. 30, 2020	Mar. 31, 2020	Oct. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
ROU assets		$ 68,000	$ 195,000
Lease liabilities		$ 62,000	$ 163,000
Scenario Forecast
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
ROU assets	$ 5,000,000
Lease liabilities	$ 5,000,000

Contracts with Customers - Cont

Contracts with Customers - Contract Assets (Details) $ in Thousands	Sep. 30, 2019USD ($)
Revenue From Contract With Customer [Abstract]
Unbilled accounts receivable	$ 36
Contract assets	$ 36

Contracts with Customers - Co_2

Contracts with Customers - Contract Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Capitalized Contract Cost [Line Items]
Contract liabilities	$ 1,532	$ 1,378
Customer deposits
Capitalized Contract Cost [Line Items]
Contract liabilities	$ 1,532	$ 1,378

Leases - Additional Information

Leases - Additional Information (Details) $ in Thousands	6 Months Ended
	Mar. 31, 2020USD ($)
Lessee Lease Description [Line Items]
Operating lease, existence of option to extend	true
Operating lease, option to extend lease terms, description	Operating lease payments include $0 related to options to extend lease terms that are reasonably certain of being exercised.
Payments related to options to extend lease terms	$ 0
Minimum
Lessee Lease Description [Line Items]
Operating lease renewal term	1 year
Maximum
Lessee Lease Description [Line Items]
Operating lease renewal term	5 years

Leases - Schedule of Financial

Leases - Schedule of Financial Statement Classification of Lease Balances With Condensed Consolidated Balance Sheet (Details) - USD ($)	Mar. 31, 2020	Oct. 01, 2019
Leases [Abstract]
Operating lease assets	$ 32,000	$ 146,000
Finance lease assets	36,000	49,000
Total lease assets	68,000	195,000
Operating lease liabilities	14,000	99,000
Finance lease liabilities	19,000	22,000
Operating lease liabilities	11,000	15,000
Finance lease liabilities	18,000	27,000
Total lease liabilities	$ 62,000	$ 163,000

Leases - Schedule of Financia_2

Leases - Schedule of Financial Statement Classification of Lease Balances in Condensed Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2020	Mar. 31, 2020
Lessee Lease Description [Line Items]
Total lease cost	$ 47	$ 130
Selling, general and administrative expenses
Lessee Lease Description [Line Items]
Operating lease cost	39	115
Finance lease cost	$ 8	$ 15

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payments Under Non-cancelable Leases Including Leases (Detail) $ in Thousands	Mar. 31, 2020USD ($)
Operating Lease
Remainder of 2020	$ 73
2021	314
2022	313
2023	313
2024	311
Thereafter	7,264
Total lease payments	8,588
Less: Interest	3,442
Present value of lease liabilities	5,146
Finance Lease
Remainder of 2020	11
2021	12
2022	7
2023	7
2024	2
Total lease payments	39
Less: Interest	2
Present value of lease liabilities	37
Operating Lease and Finance lease
Remainder of 2020	84
2021	326
2022	320
2023	320
2024	313
Thereafter	7,264
Total lease payments	8,627
Less: Interest	3,444
Present value of lease liabilities	$ 5,183

Leases - Schedule of Weighted A

Leases - Schedule of Weighted Average Remaining Term and Discount Rates (Detail)	Mar. 31, 2020
Leases [Abstract]
Operating leases, Weighted average remaining lease term (years)	24 years 6 months 7 days
Finance leases, Weighted average remaining lease term (years)	2 years 10 months 2 days
Operating leases, Weighted average discount rate	4.17%
Finance leases, Weighted average discount rate	4.17%

Assets Held for Sale, Discont_3

Assets Held for Sale, Discontinued Operations and Disposals - Additional Information (Details) - USD ($) $ in Thousands	Jan. 22, 2020	Jun. 07, 2019	Mar. 31, 2020	Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on sale of subsidiary				$ (13,709)
SoLayTec | Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on sale of subsidiary		$ 1,600
R2D
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on sale of subsidiary				(2,800)
Tempress
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Unsecured term loan, principal amount	$ 2,250
Repayment of loan received			$ 500
Expected pre-tax loss on deconsolidation	10,900
Previously recorded accumulated foreign currency translation losses recognized	$ 7,200
Forgiven unsecured term loans				500
Remaining repayment of loan received				$ 1,250

Assets Held for Sale, Discont_4

Assets Held for Sale, Discontinued Operations and Disposals - Operating Results of Discontinued Operations (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax (benefit) provision	$ (100,000)	$ 19,000	$ (47,000)	$ 37,000
Net loss from discontinued operations, net of tax	(11,151,000)	(6,647,000)	(11,816,000)	(9,267,000)
Tempress and SoLayTec | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues, net of returns and allowances	2,155,000	8,153,000	7,442,000	14,381,000
Cost of sales	1,830,000	9,229,000	5,969,000	15,352,000
Gross profit (loss)	325,000	(1,076,000)	1,473,000	(971,000)
Selling, general and administrative	476,000	4,082,000	1,814,000	5,677,000
Research, development and engineering	91,000	831,000	540,000	1,911,000
Restructuring charges	37,000	591,000	37,000	601,000
Operating loss	(279,000)	(6,580,000)	(918,000)	(9,160,000)
Loss on sale of subsidiary	(10,916,000)		(10,916,000)
Interest expense and other, net	(22,000)	(48,000)	(29,000)	(70,000)
Loss from discontinued operations before income taxes	(11,217,000)	(6,628,000)	(11,863,000)	(9,230,000)
Income tax (benefit) provision	(66,000)	19,000	(47,000)	37,000
Net loss from discontinued operations, net of tax	$ (11,151,000)	$ (6,647,000)	$ (11,816,000)	$ (9,267,000)

Assets Held for Sale, Discont_5

Assets Held for Sale, Discontinued Operations and Disposals - Assets and Liabilities Held for Sale (Details) $ in Thousands	Sep. 30, 2019USD ($)
Assets
Total current assets	$ 22,755
Total current liabilities	18,547
Tempress | Discontinued Operations, Held-for-sale
Assets
Total current assets	17,591
Property, plant and equipment - net	5,164
Total assets included in the disposal group	22,755
Total current liabilities	18,272
Long-term debt	275
Total liabilities included in the disposal group	18,547
Net assets included in the disposal group	$ 4,208

Assets Held for Sale, Discont_6

Assets Held for Sale, Discontinued Operations and Disposals - Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Reversal of) provision for allowance for doubtful accounts, net	$ (32)	$ 1,141
Tempress and SoLayTec | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations, net of tax	(11,816)	(9,267)
Depreciation and amortization	180	287
(Reversal of) provision for allowance for doubtful accounts, net	(66)	981
Purchases of property, plant and equipment	$ 1	$ 96

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Details) - shares	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	641,000	1,248,000	690,000	1,220,000

Earnings Per Share - Reconcilia

Earnings Per Share - Reconciliation of Denominators of Basic and Diluted EPS Calculations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net (loss) income from continuing operations	$ (543)	$ 1,012	$ (1,810)	$ 1,260
Net loss from discontinued operations	(11,151)	(6,647)	(11,816)	(9,267)
Net loss	$ (11,694)	$ (5,635)	$ (13,626)	$ (8,007)
Denominator:
Weighted-average shares used to compute basic EPS	14,150	14,228	14,193	14,224
Common stock equivalents		30		31
Weighted-average shares used to compute diluted EPS	14,150	14,258	14,193	14,255
Basic (loss) income per share from continuing operations	$ (0.04)	$ 0.07	$ (0.13)	$ 0.09
Basic loss per share from discontinued operations	(0.79)	(0.47)	(0.83)	(0.65)
Net loss per basic share	(0.83)	(0.40)	(0.96)	(0.56)
Diluted (loss) income per share from continuing operations	(0.04)	0.07	(0.13)	0.09
Diluted loss per share from discontinued operations	(0.79)	(0.47)	(0.83)	(0.65)
Net loss per diluted share	$ (0.83)	$ (0.40)	$ (0.96)	$ (0.56)

Inventory - Schedule of Compone

Inventory - Schedule of Components of Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Inventory Disclosure [Abstract]
Purchased parts and raw materials	$ 14,200	$ 15,192
Work-in-process	4,215	4,215
Finished goods	3,361	3,183
Inventory, gross	21,776	22,590
Excess and obsolete reserves	(4,444)	(5,058)
Inventory	$ 17,332	$ 17,532

Equity and Stock-Based Compen_3

Equity and Stock-Based Compensation - Additional Information (Details) - USD ($)	Feb. 10, 2020	Nov. 29, 2018	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Sep. 30, 2019
Equity [Abstract]
Stock-based compensation expense			$ 100,000		$ 200,000	$ 133,000	$ 363,000
Authorized stock repurchase amount	$ 4,000,000	$ 4,000,000
Common stock, par value		$ 0.01	$ 0.01			$ 0.01		$ 0.01
Stock repurchase program period	1 year	1 year
Shares repurchased and retired during the period			366,000	0
Total cost of shares repurchased and retired			$ 2,000,000
Average price per share of shares repurchased			$ 5.46
Remaining authorized amount available for repurchase			$ 2,000,000			$ 2,000,000

Equity and Stock-Based Compen_4

Equity and Stock-Based Compensation - Summary of Stock Option Activity (Details) - Stock Options	6 Months Ended
	Mar. 31, 2020$ / sharesshares
Options
Outstanding at beginning of period | shares	1,068,665
Granted | shares	32,500
Exercised | shares	(138,525)
Forfeited | shares	(87,431)
Outstanding at end of period | shares	875,209
Exercisable at end of period | shares	759,420
Weighted average fair value of options granted during the period	$ 2.89
Weighted Average Exercise Price
Outstanding at beginning of period	7.04
Granted	5.34
Exercised	5.63
Forfeited	6.67
Outstanding at end of period	7.23
Exercisable at end of period	$ 7.48

Equity and Stock-Based Compen_5

Equity and Stock-Based Compensation - Schedule of Fair Value of Stock Option Using Black-Scholes Option Pricing Model (Details)	6 Months Ended
	Mar. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Risk free interest rate	1.00%
Expected life	6 years
Volatility	58.00%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Sep. 30, 2019
Income Tax Contingency [Line Items]
Income tax expense	$ 166,000	$ 332,000	$ 207,000	$ 914,000
Income tax expense from discontinued operations	(100,000)	$ 19,000	(47,000)	$ 37,000
Unrecognized tax benefits that would impact effective tax rate	1,200,000		1,200,000		$ 1,300,000
Accrual for potential interest and penalties	$ 800,000		$ 800,000		$ 800,000
Minimum
Income Tax Contingency [Line Items]
Number of years open for tax examinations			3 years
Maximum
Income Tax Contingency [Line Items]
Number of years open for tax examinations			5 years

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2020	Sep. 30, 2019
Commitments and Contingencies [Line Items]
Purchase obligation	$ 8.8	$ 4.4
Minimum
Commitments and Contingencies [Line Items]
Severance payment term	12 months
Maximum
Commitments and Contingencies [Line Items]
Severance payment term	36 months

Business Segment Information -

Business Segment Information - Additional Information (Details)	6 Months Ended
	Mar. 31, 2020segment
Segment Reporting [Abstract]
Number of business segments	2

Business Segment Information _2

Business Segment Information - Schedule of Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Sep. 30, 2019
Segment Reporting Information [Line Items]
Net revenues	$ 14,460	$ 20,633	$ 35,152	$ 43,858
Operating income (loss)	(972)	1,248	665	1,912
Identifiable assets	99,598		99,598		$ 126,477
Discontinued Operations
Segment Reporting Information [Line Items]
Identifiable assets					22,755
Operating Segments | Semiconductor
Segment Reporting Information [Line Items]
Net revenues	11,992	16,053	29,224	35,013
Operating income (loss)	(18)	1,732	2,704	4,477
Identifiable assets	55,337		55,337		56,855
Operating Segments | SiC/LED
Segment Reporting Information [Line Items]
Net revenues	2,468	3,273	5,285	6,256
Operating income (loss)	421	877	955	1,646
Identifiable assets	8,253		8,253		7,779
Non-Segment
Segment Reporting Information [Line Items]
Net revenues		1,307	643	2,589
Operating income (loss)	(1,375)	$ (1,361)	(2,994)	$ (4,211)
Identifiable assets	$ 36,008		$ 36,008		$ 39,088

Major Customers and Foreign S_3

Major Customers and Foreign Sales - Additional Information (Details)	6 Months Ended
	Mar. 31, 2019
Net Revenues | Customer Concentration Risk | Customer One
Revenue, Major Customer [Line Items]
Concentration risk, percentage	11.00%

Major Customers and Foreign S_4

Major Customers and Foreign Sales - Schedule of Revenues by Geographic Region (Details) - Net Revenues - Geographic Concentration Risk	6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue, Major Customer [Line Items]
Concentration risk, percentage	100.00%	100.00%
United States
Revenue, Major Customer [Line Items]
Concentration risk, percentage	34.00%	40.00%
Other North America
Revenue, Major Customer [Line Items]
Concentration risk, percentage	6.00%	2.00%
Total North America
Revenue, Major Customer [Line Items]
Concentration risk, percentage	40.00%	42.00%
China
Revenue, Major Customer [Line Items]
Concentration risk, percentage	24.00%	19.00%
Malaysia
Revenue, Major Customer [Line Items]
Concentration risk, percentage	4.00%	3.00%
Taiwan
Revenue, Major Customer [Line Items]
Concentration risk, percentage	11.00%	6.00%
Other Asia
Revenue, Major Customer [Line Items]
Concentration risk, percentage	7.00%	7.00%
Total Asia
Revenue, Major Customer [Line Items]
Concentration risk, percentage	46.00%	35.00%
Germany
Revenue, Major Customer [Line Items]
Concentration risk, percentage	3.00%	11.00%
Other Europe
Revenue, Major Customer [Line Items]
Concentration risk, percentage	11.00%	12.00%
Total Europe
Revenue, Major Customer [Line Items]
Concentration risk, percentage	14.00%	23.00%