Geospace Technologies (GEOS) 10-Q 7 May 21 2021 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Mar. 31, 2021	Apr. 30, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Title of 12(b) Security	Common Stock
Trading Symbol	GEOS
Security Exchange Name	NASDAQ
Entity Registrant Name	GEOSPACE TECHNOLOGIES CORP
Entity Central Index Key	0001001115
Current Fiscal Year End Date	--09-30
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		13,463,908
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity File Number	001-13601
Entity Tax Identification Number	76-0447780
Entity Incorporation, State or Country Code	TX
Entity Address, Address Line One	7007 Pinemont
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77040
City Area Code	713
Local Phone Number	986-4444
Document Quarterly Report	true
Document Transition Report	false

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Current assets:
Cash and cash equivalents	$ 31,246	$ 32,686
Short-term investments	3,865
Trade accounts and notes receivable, net	10,531	13,778
Unbilled receivables	2,707
Inventories, net	15,313	16,933
Assets held for sale	1,732	587
Prepaid expenses and other current assets	2,179	953
Total current assets	67,573	64,937
Non-current notes receivable	3,077
Non-current inventories, net	24,580	16,930
Rental equipment, net	38,382	54,317
Property, plant and equipment, net	29,728	29,874
Operating right-of-use assets	1,309
Goodwill	4,337	4,337
Other intangible assets, net	7,465	8,331
Deferred cost of revenue and other assets	332	8,119
Total assets	176,783	186,845
Current liabilities:
Accounts payable trade	5,228	1,593
Contingent consideration	2,324
Operating lease liabilities	199
Deferred revenue and other current liabilities	8,454	8,753
Total current liabilities	16,205	10,346
Non-current contingent consideration	7,720	10,962
Non-current operating lease liabilities	1,135
Non-current deferred revenue and other liabilities	28	4,567
Total liabilities	25,088	25,875
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock, 1,000,000 shares authorized, no shares issued and outstanding
Common Stock, $.01 par value, 20,000,000 shares authorized; 13,741,096 and 13,370,639 shares issued, respectively; and 13,465,908 and 13,670,639 shares outstanding, respectively	137	137
Additional paid-in capital	91,992	90,965
Retained earnings	78,332	86,566
Accumulated other comprehensive loss	(16,438)	(16,698)
Treasury stock, at cost, 275,188 shares at March 31, 2021	(2,328)
Total stockholders’ equity	151,695	160,970
Total liabilities and stockholders’ equity	$ 176,783	$ 186,845

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Mar. 31, 2021	Sep. 30, 2020
Statement Of Financial Position [Abstract]
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	13,741,096	13,670,639
Common stock, shares outstanding	13,465,908	13,670,639
Treasury stock, shares	275,188

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Revenue:
Products	$ 21,604	$ 9,517	$ 48,326	$ 18,600
Revenue, Product and Service [Extensible List]	Product	Product	Product	Product
Rental	$ 2,288	$ 16,390	$ 4,026	$ 25,012
Total revenue	23,892	25,907	52,352	43,612
Cost of revenue:
Products	$ 17,755	$ 9,722	$ 34,585	$ 19,625
Revenue, Product and Service [Extensible List]	Product	Product	Product	Product
Rental	$ 5,290	$ 8,280	$ 10,195	$ 13,585
Total cost of revenue	23,045	18,002	44,780	33,210
Gross profit	847	7,905	7,572	10,402
Operating expenses:
Selling, general and administrative	5,478	6,066	10,832	12,063
Research and development	3,765	4,225	7,285	8,521
Change in estimated fair value of contingent consideration	(221)	972	(918)	972
Bad debt expense	1	131	8	158
Total operating expenses	9,023	11,394	17,207	21,714
Loss from operations	(8,176)	(3,489)	(9,635)	(11,312)
Other income (expense):
Interest expense		(11)		(23)
Interest income	812	216	1,133	350
Foreign exchange gains (losses), net	(36)	108	113	(24)
Other, net	277	(28)	274	(57)
Total other income, net	1,053	285	1,520	246
Loss before income taxes	(7,123)	(3,204)	(8,115)	(11,066)
Income tax expense	61	607	119	2,027
Net loss	$ (7,184)	$ (3,811)	$ (8,234)	$ (13,093)
Loss per common share:
Basic	$ (0.53)	$ (0.28)	$ (0.61)	$ (0.97)
Diluted	$ (0.53)	$ (0.28)	$ (0.61)	$ (0.97)
Weighted average common shares outstanding:
Basic	13,466,614	13,541,404	13,519,638	13,503,486
Diluted	13,466,614	13,541,404	13,519,638	13,503,486

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (7,184)	$ (3,811)	$ (8,234)	$ (13,093)
Other comprehensive income (loss):
Change in unrealized gains (losses) on available-for-sale securities, net of tax	(3)		(3)
Foreign currency translation adjustments	66	(1,017)	263	(451)
Total other comprehensive income (loss)	63	(1,017)	260	(451)
Total comprehensive loss	$ (7,121)	$ (4,828)	$ (7,974)	$ (13,544)

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning Balance at Sep. 30, 2019	$ 178,847	$ 136	$ 88,660	$ 105,808	$ (15,757)
Beginning Balance, Shares at Sep. 30, 2019		13,630,666
Net loss	(9,282)			(9,282)
Other comprehensive income (loss)	566				566
Issuance of common stock pursuant to the vesting of restricted stock units	1	$ 1
Issuance of common stock pursuant to the vesting of restricted stock units, Shares		30,823
Stock-based compensation	590		590
Ending Balance at Dec. 31, 2019	170,722	$ 137	89,250	96,526	(15,191)
Ending Balance, Shares at Dec. 31, 2019		13,661,489
Beginning Balance at Sep. 30, 2019	178,847	$ 136	88,660	105,808	(15,757)
Beginning Balance, Shares at Sep. 30, 2019		13,630,666
Net loss	(13,093)
Other comprehensive income (loss)	(451)
Ending Balance at Mar. 31, 2020	166,427	$ 137	89,783	92,715	(16,208)
Ending Balance, Shares at Mar. 31, 2020		13,664,989
Beginning Balance at Dec. 31, 2019	170,722	$ 137	89,250	96,526	(15,191)
Beginning Balance, Shares at Dec. 31, 2019		13,661,489
Net loss	(3,811)			(3,811)
Other comprehensive income (loss)	(1,017)				(1,017)
Issuance of common stock pursuant to the vesting of restricted stock units, Shares		3,500
Stock-based compensation	533		533
Ending Balance at Mar. 31, 2020	166,427	$ 137	89,783	92,715	(16,208)
Ending Balance, Shares at Mar. 31, 2020		13,664,989
Beginning Balance at Sep. 30, 2020	$ 160,970	$ 137	90,965	86,566	(16,698)
Beginning Balance, Shares at Sep. 30, 2020	13,670,639	13,670,639
Net loss	$ (1,050)			(1,050)
Other comprehensive income (loss)	197				197
Issuance of common stock pursuant to the vesting of restricted stock units, Shares		57,332
Purchase of treasury stock	(828)					$ (828)
Purchase of treasury stock, Shares		(117,637)
Stock-based compensation	548		548
Ending Balance at Dec. 31, 2020	159,837	$ 137	91,513	85,516	(16,501)	(828)
Ending Balance, Shares at Dec. 31, 2020		13,610,334
Beginning Balance at Sep. 30, 2020	$ 160,970	$ 137	90,965	86,566	(16,698)
Beginning Balance, Shares at Sep. 30, 2020	13,670,639	13,670,639
Net loss	$ (8,234)
Other comprehensive income (loss)	260
Ending Balance at Mar. 31, 2021	$ 151,695	$ 137	91,992	78,332	(16,438)	(2,328)
Ending Balance, Shares at Mar. 31, 2021	13,465,908	13,465,908
Beginning Balance at Dec. 31, 2020	$ 159,837	$ 137	91,513	85,516	(16,501)	(828)
Beginning Balance, Shares at Dec. 31, 2020		13,610,334
Net loss	(7,184)			(7,184)
Other comprehensive income (loss)	63				63
Issuance of common stock pursuant to the vesting of restricted stock units, Shares		13,500
Forfeiture of restricted stock, Shares		(375)
Purchase of treasury stock	(1,500)					(1,500)
Purchase of treasury stock, Shares		(157,551)
Stock-based compensation	479		479
Ending Balance at Mar. 31, 2021	$ 151,695	$ 137	$ 91,992	$ 78,332	$ (16,438)	$ (2,328)
Ending Balance, Shares at Mar. 31, 2021	13,465,908	13,465,908

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net loss	$ (8,234)	$ (13,093)
Adjustments to reconcile net loss to net cash provided (used in) by operating activities:
Deferred income tax benefit	(1)	(34)
Rental equipment depreciation	7,772	9,269
Property, plant and equipment depreciation	1,970	2,057
Amortization of intangible assets	866	866
Accretion of discounts on short-term investments	3
Stock-based compensation expense	1,027	1,123
Bad debt expense	8	158
Inventory obsolescence expense	1,155	1,966
Change in estimate of collectability of rental revenue		7,993
Change in estimated fair value of contingent consideration	(918)	972
Gross profit from sale of used rental equipment	(4,150)	(425)
Loss (gain) on disposal of property, plant and equipment	6	(153)
Gain on transfer of investment in security	(269)
Effects of changes in operating assets and liabilities:
Trade accounts and notes receivables	190	(771)
Unbilled receivables	(2,707)
Inventories	(6,652)	1,760
Deferred cost of revenue and other assets	6,525	(8,440)
Accounts payable trade	3,629	871
Deferred revenue and other liabilities	(4,153)	1,607
Net cash provided by (used in) operating activities	(3,933)	5,726
Cash flows from investing activities:
Purchase of property, plant and equipment	(1,673)	(2,785)
Proceeds from the sale of property, plant and equipment	2	180
Investment in rental equipment	(59)	(5,238)
Proceeds from the sale of used rental equipment	9,991	2,100
Purchases of short-term investments	(3,800)
Proceeds from investment security transaction	269
Net cash provided by (used in) investing activities	4,730	(5,743)
Cash flows from financing activities:
Purchase of treasury stock	(2,328)
Net cash used in financing activities	(2,328)
Effect of exchange rate changes on cash	91	1
Decrease in cash and cash equivalents	(1,440)	(16)
Cash and cash equivalents, beginning of fiscal year	32,686	18,925
Cash and cash equivalents, end of fiscal period	31,246	18,909
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for interest		23
Cash paid for income taxes	70	2,074
Inventory transferred to (from) rental equipment	$ (504)	$ 6,126

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Significant Accounting Policies	1. Significant Accounting Policies Basis of Presentation The consolidated balance sheet of Geospace Technologies Corporation and its subsidiaries (the “Company”) at September 30, 2020 was derived from the Company’s audited consolidated financial statements at that date. The consolidated balance sheet at March 31, 2021 and the consolidated statements of operations, comprehensive loss, stockholders’ equity and cash flows for the three and six months ended March 31, 2021 and 2020 were prepared by the Company without audit. In the opinion of management, all adjustments, consisting of normal recurring adjustments, necessary to present fairly the consolidated financial position, results of operations and cash flows were made. All intercompany balances and transactions have been eliminated. The results of operations for the three and six months ended March 31, 2021 are not necessarily indicative of the operating results for a full year or of future operations. Certain information and footnote disclosures normally included in financial statements presented in accordance with accounting principles generally accepted in the United States of America were omitted pursuant to the rules of the Securities and Exchange Commission. The accompanying consolidated financial statements should be read in conjunction with the financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the Company’s fiscal year ended September 30, 2020. Reclassifications Certain amounts previously presented in the consolidated financial statements have been reclassified to conform to the current year presentation. Such reclassifications had no effect on previously reported net loss, stockholders’ equity or cash flows. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires the use of estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. The Company considers many factors in selecting appropriate operational and financial accounting policies and controls, and in developing the estimates and assumptions that are used in the preparation of these financial statements. The Company continually evaluates its estimates, including those related to bad debt reserves, collectability of rental revenue, inventory obsolescence reserves, self-insurance reserves, product warranty reserves, useful lives of long-lived assets, impairment of long-lived assets and intangible assets, contingent consideration, investment in debt security and deferred income tax assets. The Company bases its estimates on historical experience and various other factors that are believed to be reasonable under the circumstances. While management believes current estimates are reasonable and appropriate, actual results may differ from these estimates under different conditions or assumptions. Cash and Cash Equivalents The Company considers all highly liquid investments purchased with an original or remaining maturity at the time of purchase of three months or less to be cash equivalents. At March 31, 2021, cash and cash equivalents included $5.3 million held by the Company’s foreign subsidiaries and branch offices. If the Company were to repatriate the cash held by its foreign subsidiaries, it could be required to accrue and pay taxes on any amount repatriated. The Tax Cut and Jobs Act (“2017 Tax Act”) creates new taxes on certain foreign earnings and also requires entities to pay a one-time transition tax on undistributed earnings of their foreign subsidiaries which were previously tax deferred. The Company has determined it is not required to pay transition tax on the undistributed earnings of its foreign subsidiaries since it had no accumulated foreign earnings on a consolidated basis. Recently Issued Accounting Pronouncements In June 2016, the Financial Accounting Standards Board (the “FASB”) issued guidance surrounding credit losses for financial instruments that replaces the incurred loss impairment methodology in generally accepted accounting principles. The new impairment model requires immediate recognition of estimated credit losses expected to occur for most financial assets and certain other financial instruments. For available-for-sale debt securities with unrealized losses, credit losses will be recognized as allowances rather than reductions in the amortized cost of the securities. As a small reporting company, the Company must adopt this standard no later than the first quarter of its fiscal year ending September 30, 2024. Early adoption is permitted. The standard’s provisions will be applied as a cumulative-effect adjustment to retained earnings as of the beginning of the first effective reporting period. The Company intends to adopt this standard during the first quarter of its fiscal year ending September 30, 2024 and is continuing to evaluat e the impact of this new guidance on its consolidated financial statements. In December 2019, the FASB issued guidance on simplifying the accounting for income taxes. The guidance eliminates certain exceptions to the general principles in Topic 740 and clarifies and amends existing guidance to improve consistent application. This guidance is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2020. Certain amendments within the guidance are required to be applied on a retrospective basis for all periods presented; others are to be applied using a modified retrospective approach with a cumulative-effect adjustment to retained earnings, if any, as of the beginning of the first reporting period in which the guidance is adopted; and yet others are to be applied using either basis. All other amendments not specified in the guidance should be applied on a prospective basis. Early adoption is permitted. An entity that elects to early adopt in an interim period should reflect any adjustments as of the beginning of the annual period that includes that interim period. Additionally, an entity that elects early adoption must adopt all the amendments in the same period. The Company intends to adopt this standard during the first quarter of its fiscal year ending September 30, 2022 and is continuing to evaluate the new guidance to determine the impact it will have on its condensed consolidated financial statements.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Mar. 31, 2021
Revenue From Contract With Customer [Abstract]
Revenue Recognition	2. Revenue Recognition In accordance with ASC Topic 606, Revenue from Contracts with Customers The Company primarily derives product revenue from the sale of its manufactured products. Revenue from these product sales, including the sale of used rental equipment, is recognized when obligations under the terms of a contract are satisfied, control is transferred and collectability of the sales price is probable. The Company assesses collectability during the contract assessment phase. In situations where collectability of the sales price is not probable, the Company recognizes revenue when it determines that collectability is probable or when non-refundable cash is received from its customers. Transfer of control generally occurs with shipment or delivery, depending on the terms of the underlying contract. The Company’s products are generally sold without any customer acceptance provisions, and the Company’s standard terms of sale do not allow customers to return products for credit. Revenue from engineering services is recognized as services are rendered over the duration of a project, or as billed on a per hour basis. Field service revenue is recognized when services are rendered and is generally priced on a per day rate. The Company also generates revenue from short-term rentals under operating leases of its manufactured products. Rental revenue is recognized as earned over the rental period if collectability of the rent is reasonably assured. Rentals of the Company’s equipment generally range from daily rentals to minimum rental periods of up to six months or longer. The Company has determined that ASC 606 does not apply to rental contracts, which are within the scope of ASC Topic 842, Leases As permissible under the new standard, sales taxes and transaction-based taxes are excluded from revenue. The Company does not disclose the value of unsatisfied performance obligations for contracts with an original expected duration of one year or less. Additionally, the Company expenses costs incurred to obtain contracts when incurred because the amortization period would have been one year or less. These costs are recorded in selling, general and administrative expenses. The Company has elected to treat shipping and handling activities in a sales transaction after the customer obtains control of the goods as a fulfillment cost and not as a promised service. Accordingly, fulfillment costs related to the shipping and handling of goods are accrued at the time of shipment. Amounts billed to a customer in a sales transaction related to reimbursable shipping and handling costs are included in revenue and the associated costs incurred by the Company for reimbursable shipping and handling expenses are reported in cost of revenue. During the third quarter of fiscal year 2020, the Company was awarded a $10.5 million contract (inclusive of a subsequent contract amendment of $0.3 million) with the U.S. Customs and Border Protection (“CBP”) to provide a technology solution to the Department of Homeland Security. Revenue recognized under the contract for fiscal year 2020 and for the six months ended March 31, 2021 was $0.3 million and $8.9 million, respectively. The Company had unbilled receivables of $2.7 million at March 31, 2021 under this contract. Unrecognized revenue for unsatisfied performance obligations on this contract at March 31, 2021 was approximately $1.3 million. The Company anticipates the revenue on the remaining performance obligation on this contract will be recognized in fiscal year 2021. Unsatisfied performance obligations on all other contracts held by the Company at March 31, 2021 had an original duration of one year or less. At March 31, 2021, the Company had no deferred contract costs or deferred contract liabilities. At September 30, 2020, the Company had no deferred contract costs and $0.2 million deferred contract liabilities, which are included in current liabilities on the Company’s consolidated balance sheet as a component of deferred revenue and other liabilities. During the three and six months ended March 31, 2021, no revenue and $0.2 million, respectively, was recognized from deferred contract liabilities. During the three and six months ended March 31, 2020, no revenue was recognized from deferred contract liabilities. No cost of revenue was recognized from deferred contract costs for the three and six months end March 31, 2021 and 2020. During the second quarter of fiscal year 2020, the Company partially financed a $12.5 million product sale by entering into a $10.0 million promissory note with the customer. The note is for a three-year For each of the Company’s operating segments, the following table presents revenue only from the sale of products and the performance of services under contracts with customers (in thousands). Therefore, the table excludes all revenue earned from rental contracts. Three Months Ended Six Months Ended March 31, 2021 March 31, 2020 March 31, 2021 March 31, 2020 Oil and Gas Markets Traditional exploration product revenue $ 790 $ 1,257 $ 1,787 $ 3,587 Wireless exploration product revenue 12,630 479 22,659 883 Reservoir product revenue 465 337 494 517 Total revenue 13,885 2,073 24,940 4,987 Adjacent Markets Industrial product revenue 4,977 4,186 9,384 7,782 Imaging product revenue 2,577 2,886 5,040 5,362 Total revenue 7,554 7,072 14,424 13,144 Emerging Markets Revenue 165 372 8,962 469 Total $ 21,604 $ 9,517 $ 48,326 $ 18,600 See Note 13 for more information on the Company’s operating segments. For each of the geographic areas where the Company operates, the following table presents revenue (in thousands) from the sale of products and services under contracts with customers. The table excludes all revenue earned from rental contracts: Three Months Ended Six Months Ended March 31, 2021 March 31, 2020 March 31, 2021 March 31, 2020 Asia $ 1,093 $ 830 $ 12,466 $ 1,275 Canada 481 794 888 1,267 Europe 1,704 1,259 2,879 2,672 United States 18,055 6,184 31,419 12,781 Other 271 450 674 605 Total $ 21,604 $ 9,517 $ 48,326 $ 18,600 Revenue is attributable to countries based on the ultimate destination of the product sold, if known. If the ultimate destination is not known, revenue is attributable to countries based on the geographic location of the initial shipment.

Investments

Investments	6 Months Ended
	Mar. 31, 2021
Investments Debt And Equity Securities [Abstract]
Investments	3. Investments Short-term Investments The Company classifies its short-term investments as available-for-sale securities. Available-for-sale securities are carried at fair market value with net unrealized gains and losses reported as a component of accumulated other comprehensive loss in stockholders’ equity. No realized gains or losses were recognized during the three and six months ended March 31, 2021 and 2020. The Company’s short-term investments were composed of the following (in thousands): As of March 31, 2021 (in thousands) Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value Short-term investments: Corporate bonds $ 3,868 $ (3 ) $ — $ 3,865 The Company had no short-term investments at September 30, 2020. The Company’s short-term investments had contractual maturities ranging from September 2021 May 2022 Investment in Debt Security On July 13, 2020, the Company received an interest in a senior secured bond issued from an international seismic marine customer. The Company’s interest in the bond, which has a face value of $13.0 million, was received in exchange for $13.0 million of unpaid invoices and late fees owed by the customer. The bond is secured by a third in line lien on the assets owned by the customer and has an 8% interest rate with bi-annual interest and possible principal payments based on available excess cash flows. Interest payments can be made either in cash or in-kind payments in the form of additional debt security. In-kind interest payments require an 8.8% interest rate. The bond matures on July 13, 2022. The bond is listed on the Oslo Alternative Bond Market; however, the actual marketability of the bond is unknown at this time. Upon receipt of the senior secured bond, the Company performed a fair value assessment of the investment to determine the bond’s initial carrying amount. In accordance with ASC 825, “Fair Value Instruments”, the Company has determined that the investment is a Level 3 financial instrument primarily due to its current unknown marketability. Because of the distressed financial condition of the customer, the Company believes the fair value of the bond is nominal. In January 2021, the Company transferred the security pursuant to a purchase agreement (the “Agreement”) entered with a third party (the “Buyer”). Pursuant to the Agreement, the Company received non-refundable consideration of $0.3 million and will receive additional cash compensation of $2.4 million from the Buyer if certain terms and conditions between the Buyer and the Company’s customer are met by December 31, 2021. In the event these terms and conditions are not met, the Company has the option to reacquire the bond from the Buyer for one dollar US ($1.00). The Company recognized a gain on investment of $0.3 million during the three months ended March 31, 2021 in connection with the transfer of the bond.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	4. Fair Value of Financial Instruments The Company’s financial instruments generally include cash and cash equivalents, short-term investments, trade accounts, notes receivable and accounts payable. Due to the short-term maturities of cash and cash equivalents, trade accounts, notes receivable and accounts payable, the carrying amounts of these financial instruments are deemed to approximate their fair value on the respective balance sheet dates. The valuation technique used to measure the fair value of the contingent consideration was derived from models utilizing market observable inputs. The Company measures its short-term investments and contingent consideration at fair value on a recurring basis. The following tables present the fair value of the Company’s short-term investments and contingent consideration by valuation hierarchy and input (in thousands): As of March 31, 2021 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable (Level 2) Significant Unobservable (Level 3) Totals Short-term investments: Corporate bonds $ 3,865 $ — $ — $ 3,865 Total assets $ 3,865 $ — $ — $ 3,865 Contingent consideration: Current portion — — (2,324 ) (2,324 ) Non-current portion — — (7,720 ) (7,720 ) Total liabilities $ — $ — $ (10,044 ) $ (10,044 ) As of September 30, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable (Level 2) Significant Unobservable (Level 3) Totals Non-current contingent consideration $ — $ — $ (10,962 ) $ (10,962 ) The following table summarizes changes in the fair value of the Company’s Level 3 financial instruments for the six months ended March 31, 2021: Balance at October 1, 2020 $ 10,962 Fair value adjustments (697 ) Balance at December 31, 2020 10,265 Fair value adjustments (221 ) Balance at March 31, 2021 $ 10,044 Adjustments to the fair value of the contingent consideration are based on Monte Carlo simulations or the probability-weighted expected return method utilizing inputs which include market comparable information and management assessments regarding potential future scenarios. The Company believes its estimates and assumptions are reasonable, however, there is significant judgment involved.

Trade Accounts and Notes Receiv

Trade Accounts and Notes Receivable	6 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Trade Accounts and Notes Receivable	5. Trade Accounts and Notes Receivable Trade accounts receivable, net (excluding notes receivable) are reflected in the following table (in thousands): March 31, 2021 September 30, 2020 Trade accounts receivable $ 7,606 $ 14,090 Allowance for doubtful accounts (523 ) (496 ) Total $ 7,083 $ 13,594 The allowance for doubtful accounts represents the Company’s best estimate of probable credit losses. The Company determines the allowance based upon historical experience and a current review of its trade accounts receivable balances. Trade accounts receivable balances are charged off against the allowance whenever it is probable that the receivable balance will not be recoverable. Notes receivable are reflected in the following table (in thousands): March 31, 2021 September 30, 2020 Notes receivable $ 6,525 $ 184 Less current portion (3,448 ) (184 ) Non-current notes receivable $ 3,077 $ — Promissory notes receivable are generally collateralized by the products sold, and bear interest at rates ranging up to 8% per year. The promissory notes receivable mature at various times through January 2023. The Company has, on occasion, extended or renewed notes receivable as they mature, but there is no obligation to do so. During the second quarter of fiscal year 2020, the Company partially financed a $12.5 million product sale by entering into a $10.0 million promissory note with the customer. The note is for a three-year During the first quarter of fiscal year 2021, the Company entered into a $13.2 million short-term promissory note with a customer related to the sale of rental equipment and an outstanding receivable balance. The note, which bore interest at 8% per annum, was paid during the three months ended March 31, 2021.

Inventories

Inventories	3 Months Ended
	Dec. 31, 2020
Inventory Disclosure [Abstract]
Inventories	6. Inventories Inventories consist of the following (in thousands): March 31, 2021 September 30, 2020 Finished goods $ 21,492 $ 20,798 Work in process 4,230 984 Raw materials 49,497 47,041 Obsolescence reserve (35,326 ) (34,960 ) 39,893 33,863 Less current portion (15,313 ) (16,933 ) Non-current portion $ 24,580 $ 16,930 Raw materials include semi-finished goods and component parts that totaled approximately $28.5 million and $24.3 million at March 31, 2021 and September 30, 2020, respectively.

Leases

Leases	6 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Leases	7. Leases As Lessee The Company has elected not to record operating right-of-use assets or operating lease liabilities on its consolidated balance sheet for leases having a minimum term of 12 months or less. Such leases are expensed on a straight-line basis over the lease term. As of March 31, 2021, the Company has two operating right-of-use assets related to leased facilities in Austin, Texas and Cocoa Beach, Florida. Maturities of the operating lease liabilities as of March 31, 2021 were as follows: (in thousands): For fiscal years ending September 30, 2021 (remainder) $ 120 2022 262 2023 270 2024 278 2025 186 Thereafter 356 Future minimum lease payments 1,472 Less interest 138 Present value of minimum lease payments 1,334 Less current portion 199 Long-term portion $ 1,135 Lease costs recognized in the consolidated statements of operations for the three and six months ended March 31, 2021 and 2020 is as follows (in thousands): Three Months Ended Six Months Ended March 31, 2021 March 31, 2020 March 31, 2021 March 31, 2020 Right-of-use operating lease costs $ 73 $ 38 $ 111 $ 75 Short-term lease costs 66 75 140 151 Total $ 139 $ 113 $ 251 $ 226 Right-of-use operating lease costs and short-term lease costs are included as a component of total operating expenses. Other information related to operating leases is as follows (in thousands): Six Months Ended March 31, 2021 March 31, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 91 $ 82 Operating lease assets obtained in exchange for new lease liabilities 1,336 — Weighted average remaining lease term 6.0 years 1.0 year Weighted average discount rate 3.25 % 5.00 % The discount rate used on the operating right-of-use assets represented the Company’s incremental borrowing rate at lease inception. As Lessor The Company leases equipment to customers primarily for terms of six months or less. All of the Company’s leasing arrangements as lessor are classified as operating leases. The majority of the Company’s rental revenue is generated from its marine-based wireless seismic data acquisition system. The Company regularly evaluates the collectability of its lease receivables on a lease by lease basis. The evaluation primarily consists of reviewing past due account balances and other factors such as the credit quality of the customer, historical trends of the customer and current economic conditions. The Company suspends revenue recognition when the collectability of amounts due are no longer probable and concurrently records a direct write-off of the lease receivable to rental revenue and limits future rental revenue recognition to cash received. As of March 31, 2021, the Company had lease receivables from customers, net of reserves, of approximately $1.8 million. Rental revenue for the three and six months ended March 31, 2021 was $2.3 million and $4.0 million, respectively. Rental revenue for the three and six months ended March 31, 2020 was $16.4 million and $25.0 million, respectively. At March 31, 2021, future minimum lease obligations due from the Company’s leasing customers (all in fiscal year 2021) were $7.1 million. Rental equipment consisted of the following (in thousands): March 31, 2021 September 30, 2020 Rental equipment, primarily wireless recording equipment $ 90,399 $ 114,783 Accumulated depreciation and impairment (52,017 ) (60,466 ) $ 38,382 $ 54,317 During the second quarter of fiscal year 2021, the Company entered into a memorandum of understanding with a customer to lease land-based wireless seismic rental equipment from its rental fleet. The transaction is expected to be in the form of a sales-type lease with ownership of the equipment transferring to the customer upon completion of the lease, which has a term of six months. The carrying amount of the equipment to be leased is $1.3 million and has been reclassified from rental equipment to assets held for sale on its consolidated balance sheet as of March 31, 2021. Total lease payments due from the customer under the lease exceed the equipment’s carrying value. The Company anticipates the transaction will be consummated during the third quarter of fiscal year 2021.

Assets Held for Sale

Assets Held for Sale	6 Months Ended
	Mar. 31, 2021
Discontinued Operations And Disposal Groups [Abstract]
Assets Held for Sale	8. Assets Held for Sale Property, Plant & Equipment The Company owns a property located in Bogot á Rental Equipment The Company classified rental equipment with a carrying value of $1.3 million as assets held for sale on its consolidated balance sheet as of March 31, 2021. See Note 7 for more information.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Mar. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	9. Goodwill and Other Intangible Assets The Company’s consolidated goodwill and other intangible assets consisted of the following (in thousands): Weighted- Average Remaining Useful Lives (in years) March 31, 2021 September 30, 2020 Goodwill $ 4,337 $ 4,337 Other intangible assets: Developed technology 15.4 5,918 5,918 Customer relationships 1.4 3,900 3,900 Trade names 2.4 1,930 1,930 Non-compete agreements 1.5 170 170 Total other intangible assets 8.5 11,918 11,918 Accumulated amortization (4,453 ) (3,587 ) $ 7,465 $ 8,331 The Company’s goodwill is entirely associated with its Emerging Markets reporting unit. At March 31, 2021, the Company determined there were no triggering events requiring an impairment assessment of its goodwill and other intangible assets. Other intangible assets amortization expense was $0.4 million for each of the three months ended March 31, 2021 and 2020 and $0.9 million for each of the six months ended March 31, 2021 and 2020. As of March 31, 2021, future estimated amortization expense of other intangible assets is as follows (in thousands): For fiscal years ending September 30, 2021 (remainder) $ 866 2022 1,624 2023 714 2024 342 2025 329 Thereafter 3,590 $ 7,465

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Mar. 31, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	10. Stock-Based Compensation During the six months ended March 31, 2021, the Company issued 189,950 restricted stock units (“RSUs”) under its 2014 Long Term Incentive Plan, as amended (the “Plan”). The RSUs issued include both time-based and performance-based vesting provisions. The weighted average grant date fair value of each RSU was $6.96 per unit. The grant date fair value of the RSUs was $1.3 million, which will be charged to expense over the next four years as the restrictions lapse. Compensation expense for RSUs was determined based on the closing market price of the Company’s stock on the date of grant applied to the total number of units that are anticipated to fully vest. Each RSU represents a contingent right to receive one share of the Company’s common stock upon vesting . As of March 31 , 202 1 , the Company had unrecognized compensation expense of $ 3.1 million relating to RSUs that is expected to be recognized over a weighted average period of 2.8 years . As of March 31, 2021, the Company had $0.5 million of unrecognized compensation expense related to restricted stock awards (“RSAs”) that is expected to be recognized over a weighted average period of 0.9 years. As of March 31, 2021, there were 334,687 RSUs, 48,847 RSAs and 38,800 nonqualified stock options outstanding.

Loss Per Common Share

Loss Per Common Share	6 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Loss Per Common Share	11. Loss Per Common Share The following table summarizes the calculation of net loss and weighted average common shares and common equivalent shares outstanding for purposes of the computation of loss per share (in thousands, except share and per share data): Three Months Ended Six Months Ended March 31, 2021 March 31, 2020 March 31, 2021 March 31, 2020 Net loss $ (7,184 ) $ (3,811 ) $ (8,234 ) $ (13,093 ) Less: Loss allocable to unvested restricted stock — — — — Loss attributable to common shareholders for diluted earnings per share $ (7,184 ) $ (3,811 ) $ (8,234 ) $ (13,093 ) Weighted average number of common share equivalents: Common shares used in basic loss per share 13,466,614 13,541,404 13,519,638 13,503,486 Common share equivalents outstanding related to stock options and RSUs — — — — Total weighted average common shares and common share equivalents used in diluted loss per share 13,466,614 13,541,404 13,519,638 13,503,486 Loss per share: Basic $ (0.53 ) $ (0.28 ) $ (0.61 ) $ (0.97 ) Diluted $ (0.53 ) $ (0.28 ) $ (0.61 ) $ (0.97 ) For the calculation of diluted loss per share for the three and six months ended March 31, 2021, 38,800 stock options and 334,687 non-vested RSUs were excluded in the calculation of weighted average shares outstanding since their impact on diluted loss per share was antidilutive. For the calculation of diluted loss per share for the three and six months ended March 31, 2020, 103,100 stock options and 265,220 non-vested RSUs, respectively, were excluded in the calculation of weighted average shares outstanding since their impact on diluted loss per share was antidilutive.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Mar. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	12. Commitments and Contingencies Contingent Consideration In connection with its acquisitions of Quantum Technology Sciences, Inc. (“Quantum”) and the OptoSeis ® The Company recorded an initial contingent earn-out liability of $7.7 million in connection with its July 2018 acquisition of Quantum. Contingent payments, if any, may be paid in the form of cash or Company stock and will be derived from eligible revenue generated during a four-year The Company recorded an initial contingent earn-out liability of $ 4.3 million in connection with its November 2018 acquisition of all the intellectual property and related assets of the OptoSeis ® fiber optic sensing technology. Contingent cash payments, if any, will be derived from eligible revenue generated during a five-and-a-half year earn-out period ending in May 2024 . The maximum amount of contingent payments is $ 23.2 million over the five-and-a-half year earn-out period. At September 30, 2020, the contingent earn-out liability was valued at $ 5.2 million . During the six months ended March 31, 202 1 , the Company recorded an adjustment of $ 0.1 million to de crease the liability to an estimated value of $ million. The Company reviews and assesses the fair value of its contingent earn-out liabilities on a quarterly basis. Operating Leases The Company leases office space and certain equipment for terms of seven years or less. As of March 31, 2021, future minimum lease payment obligations were $1.5 million. Legal Proceedings The Company is involved in various pending legal actions in the ordinary course of its business. Management is unable to predict the ultimate outcome of these actions, because of the inherent uncertainty of such actions. However, management believes that the most probable, ultimate resolution of these pending matters will not have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows.

Segment Information

Segment Information	6 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Segment Information	13. Segment Information The Company reports and evaluates financial information for three operating segments: Oil and Gas Markets, Adjacent Markets and Emerging Markets. The Oil and Gas Markets segment products include wireless seismic data acquisition systems, reservoir characterization products and services, and traditional seismic exploration products such as geophones, hydrophones, leader wire, connectors, cables, marine streamer retrieval and steering devices and various other seismic products. The Adjacent Markets segment products include imaging equipment, water meter products, offshore cables, and seismic sensors used for vibration monitoring and geotechnical applications such as mine safety applications and earthquake detection. The Emerging Markets segment provides seismic products targeted at the border and perimeter security markets. The following table summarizes the Company’s segment information (in thousands): Three Months Ended Six Months Ended March 31, 2021 March 31, 2020 March 31, 2021 March 31, 2020 Revenue: Oil and Gas Markets $ 16,132 $ 18,434 $ 28,895 $ 29,943 Adjacent Markets 7,595 7,101 14,495 13,200 Emerging Markets 165 372 8,962 469 Total $ 23,892 $ 25,907 $ 52,352 $ 43,612 Income (loss) from operations: Oil and Gas Markets $ (5,465 ) $ 1,310 $ (11,451 ) $ (2,584 ) Adjacent Markets 1,562 1,214 2,822 2,065 Emerging Markets (1,189 ) (2,500 ) 5,290 (3,865 ) Corporate (3,084 ) (3,513 ) (6,296 ) (6,928 ) Total $ (8,176 ) $ (3,489 ) $ (9,635 ) $ (11,312 )

Income Taxes

Income Taxes	6 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	14. Income Taxes Consolidated income tax expense for the three and six months ended March 31, 2021 was $0.1 million and $0.1 million, respectively. Consolidated income tax expense for the three and six months ended March 31, 2020 was $0.6 million and $2.0 million, respectively. This decrease in fiscal year 2021 income tax expense was primarily the result of a decrease in rental revenue earned in foreign jurisdictions requiring tax withholding. The Company is currently unable to record any tax benefits from the tax losses it incurs in the U.S., Canada and Russian Federation due to the uncertainty surrounding its ability to utilize such losses in the future to offset taxable income.

Risks and Uncertainties

Risks and Uncertainties	6 Months Ended
	Mar. 31, 2021
Risks And Uncertainties [Abstract]
Risks and Uncertainties	15. Risks and Uncertainties Concentration of Credit Risk As of March 31, 2021, the Company had combined trade accounts and notes receivable and unbilled receivables from three customers of $6.9 million, $4.2 million and $1.0 million. During the six months ended March 31, 2021, revenue recognized from these three customers was $13.2 million, $12.7 million and $8.9 million, respectively. COVID-19 Pandemic The ongoing COVID-19 pandemic has spread across the globe and has negatively impacted worldwide economic activity, including the global demand for oil and natural gas, and continues to create challenges in the Company’s markets. In addition to measures the Company has taken voluntarily, the government authorities in the Company’s markets have taken actions to mitigate the spread of COVID-19, including travel restrictions, border closings, restrictions on public gatherings, stay-at-home orders and other quarantine and isolation measures. Following the initial outbreak of the virus, the Company experienced disruptions in its supply chain, a reduction in demand for certain products, cancellation of rental contracts and difficulty with field employees and salespeople traveling domestically and abroad to conduct the Company’s business. COVID-19 continues to pose the risk that the Company or its employees, contractors, suppliers and customers may be prevented from conducting business activities for an indefinite period of time, including potential spread of the disease within these groups or restrictions that may be requested or mandated by governmental authorities, including quarantines of certain geographic areas, restrictions on travel and other restrictions that prohibit employees from going to work, both around the world as well as in certain jurisdictions in the United States. The continued spread of COVID–19 and the related mitigation measures have disrupted the Company’s supply chain, resulting in longer lead times in materials shipped from suppliers and extended the shipping time for these materials to reach the Company’s facilities. If COVID–19 continues to spread or the response to contain the COVID–19 pandemic is unsuccessful, the Company could experience a material adverse effect on its business, financial condition, results of operations and liquidity. Decrease in Oil Commodity Price Levels Demand for many of the Company’s products and the profitability of its operations depend primarily on the level of worldwide oil and gas exploration activity. Prevailing oil and gas prices, with an emphasis on crude oil prices, and market expectations regarding potential changes in such prices significantly affect the level of worldwide oil and gas exploration activity. During periods of improved energy commodity prices, the capital spending budgets of oil and natural gas operators tend to expand, which results in increased demand for the Company’s products. Conversely, in periods when these energy commodity prices deteriorate, capital spending budgets of oil and natural gas operators tend to contract and the demand for the Company’s products generally weakens. Historically, the markets for oil and gas have been volatile and are subject to wide fluctuations in response to changes in the supply of and demand for oil and gas, market uncertainty and a variety of additional factors that are beyond its control. These factors include the level of consumer demand, regional and international economic conditions, weather conditions, domestic and foreign governmental regulations (including those related to climate change), price and availability of alternative fuels, political conditions, instability and hostilities in the Middle East and other significant oil-producing regions, increases and decreases in the supply of oil and gas, the effect of worldwide energy conservation measures and the ability of OPEC to set and maintain production levels and prices of foreign imports. Sustained low oil prices or the failure of oil prices to rise in the future and the resulting downturns or lack of growth in the energy industry and energy‑related business, could have a negative impact on the Company’s results of operations and financial condition. In light of the decline in oil prices caused by the COVID-19 pandemic in 2020, oil and gas exploration and production companies experienced a significant reduction in cash flows, which resulted in reductions in their capital spending budgets for oil and gas exploration-focused activities, including seismic data acquisition activities. Demand for the sale of the Company’s seismic products targeted at customers in its Oil and Gas Markets segment, which has historically accounted for the majority of its revenue, significantly declined during fiscal year 2020, and both product sales and rental revenue could significantly diminish during the remainder of fiscal year 2021 or beyond as a result of significant uncertainty in the outlook for oil and gas exploration. Specifically, the Company expects these challenging industry conditions to result in decreased demand for its marine wireless nodal products and its land-based seismic products, as the demand for such products has been, and will likely continue to be, vulnerable to downturns in the economy and the oil and gas industry in general. In addition to the negative effects of slowdowns in the United States economy, slowing economic growth in growing economies like those in China and India could lead to a decline in demand for crude oil and natural gas. Slowdowns in economic activity would likely reduce worldwide demand for energy and result in an extended period of lower crude oil and natural gas prices. Any material changes in oil and gas prices or other market trends that adversely impact seismic exploration activity would likely affect the demand for the Company’s products and could materially and adversely affect its results of operations and liquidity. Generally, imbalances in the supply and demand for oil and gas will affect oil and gas prices and, in such circumstances, demand for the Company’s oil and gas products may be adversely affected when world supplies exceed demand.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	6 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The consolidated balance sheet of Geospace Technologies Corporation and its subsidiaries (the “Company”) at September 30, 2020 was derived from the Company’s audited consolidated financial statements at that date. The consolidated balance sheet at March 31, 2021 and the consolidated statements of operations, comprehensive loss, stockholders’ equity and cash flows for the three and six months ended March 31, 2021 and 2020 were prepared by the Company without audit. In the opinion of management, all adjustments, consisting of normal recurring adjustments, necessary to present fairly the consolidated financial position, results of operations and cash flows were made. All intercompany balances and transactions have been eliminated. The results of operations for the three and six months ended March 31, 2021 are not necessarily indicative of the operating results for a full year or of future operations. Certain information and footnote disclosures normally included in financial statements presented in accordance with accounting principles generally accepted in the United States of America were omitted pursuant to the rules of the Securities and Exchange Commission. The accompanying consolidated financial statements should be read in conjunction with the financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the Company’s fiscal year ended September 30, 2020.
Reclassifications	Reclassifications Certain amounts previously presented in the consolidated financial statements have been reclassified to conform to the current year presentation. Such reclassifications had no effect on previously reported net loss, stockholders’ equity or cash flows.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires the use of estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. The Company considers many factors in selecting appropriate operational and financial accounting policies and controls, and in developing the estimates and assumptions that are used in the preparation of these financial statements. The Company continually evaluates its estimates, including those related to bad debt reserves, collectability of rental revenue, inventory obsolescence reserves, self-insurance reserves, product warranty reserves, useful lives of long-lived assets, impairment of long-lived assets and intangible assets, contingent consideration, investment in debt security and deferred income tax assets. The Company bases its estimates on historical experience and various other factors that are believed to be reasonable under the circumstances. While management believes current estimates are reasonable and appropriate, actual results may differ from these estimates under different conditions or assumptions.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments purchased with an original or remaining maturity at the time of purchase of three months or less to be cash equivalents. At March 31, 2021, cash and cash equivalents included $5.3 million held by the Company’s foreign subsidiaries and branch offices. If the Company were to repatriate the cash held by its foreign subsidiaries, it could be required to accrue and pay taxes on any amount repatriated. The Tax Cut and Jobs Act (“2017 Tax Act”) creates new taxes on certain foreign earnings and also requires entities to pay a one-time transition tax on undistributed earnings of their foreign subsidiaries which were previously tax deferred. The Company has determined it is not required to pay transition tax on the undistributed earnings of its foreign subsidiaries since it had no accumulated foreign earnings on a consolidated basis.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In June 2016, the Financial Accounting Standards Board (the “FASB”) issued guidance surrounding credit losses for financial instruments that replaces the incurred loss impairment methodology in generally accepted accounting principles. The new impairment model requires immediate recognition of estimated credit losses expected to occur for most financial assets and certain other financial instruments. For available-for-sale debt securities with unrealized losses, credit losses will be recognized as allowances rather than reductions in the amortized cost of the securities. As a small reporting company, the Company must adopt this standard no later than the first quarter of its fiscal year ending September 30, 2024. Early adoption is permitted. The standard’s provisions will be applied as a cumulative-effect adjustment to retained earnings as of the beginning of the first effective reporting period. The Company intends to adopt this standard during the first quarter of its fiscal year ending September 30, 2024 and is continuing to evaluat e the impact of this new guidance on its consolidated financial statements. In December 2019, the FASB issued guidance on simplifying the accounting for income taxes. The guidance eliminates certain exceptions to the general principles in Topic 740 and clarifies and amends existing guidance to improve consistent application. This guidance is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2020. Certain amendments within the guidance are required to be applied on a retrospective basis for all periods presented; others are to be applied using a modified retrospective approach with a cumulative-effect adjustment to retained earnings, if any, as of the beginning of the first reporting period in which the guidance is adopted; and yet others are to be applied using either basis. All other amendments not specified in the guidance should be applied on a prospective basis. Early adoption is permitted. An entity that elects to early adopt in an interim period should reflect any adjustments as of the beginning of the annual period that includes that interim period. Additionally, an entity that elects early adoption must adopt all the amendments in the same period. The Company intends to adopt this standard during the first quarter of its fiscal year ending September 30, 2022 and is continuing to evaluate the new guidance to determine the impact it will have on its condensed consolidated financial statements.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Mar. 31, 2021
Revenue From Contract With Customer [Abstract]
Summary of Revenue from the Sale of Products and Performance of Services Under Contracts with Customers Excludes All Revenue Earned from Rental Contracts by Operating Segments	For each of the Company’s operating segments, the following table presents revenue only from the sale of products and the performance of services under contracts with customers (in thousands). Therefore, the table excludes all revenue earned from rental contracts. Three Months Ended Six Months Ended March 31, 2021 March 31, 2020 March 31, 2021 March 31, 2020 Oil and Gas Markets Traditional exploration product revenue $ 790 $ 1,257 $ 1,787 $ 3,587 Wireless exploration product revenue 12,630 479 22,659 883 Reservoir product revenue 465 337 494 517 Total revenue 13,885 2,073 24,940 4,987 Adjacent Markets Industrial product revenue 4,977 4,186 9,384 7,782 Imaging product revenue 2,577 2,886 5,040 5,362 Total revenue 7,554 7,072 14,424 13,144 Emerging Markets Revenue 165 372 8,962 469 Total $ 21,604 $ 9,517 $ 48,326 $ 18,600
Summary of Revenue from the Sale of Products and Services Under Contracts with Customers Excludes All Revenue Earned from Rental Contracts by Geographic Areas	For each of the geographic areas where the Company operates, the following table presents revenue (in thousands) from the sale of products and services under contracts with customers. The table excludes all revenue earned from rental contracts: Three Months Ended Six Months Ended March 31, 2021 March 31, 2020 March 31, 2021 March 31, 2020 Asia $ 1,093 $ 830 $ 12,466 $ 1,275 Canada 481 794 888 1,267 Europe 1,704 1,259 2,879 2,672 United States 18,055 6,184 31,419 12,781 Other 271 450 674 605 Total $ 21,604 $ 9,517 $ 48,326 $ 18,600

Investments (Tables)

Investments (Tables)	6 Months Ended
	Mar. 31, 2021
Investments Debt And Equity Securities [Abstract]
Summary of Short-Term Investments	The Company’s short-term investments were composed of the following (in thousands): As of March 31, 2021 (in thousands) Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value Short-term investments: Corporate bonds $ 3,868 $ (3 ) $ — $ 3,865

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value of Company's Short-Term Investment and Contingent Consideration by Valuation Hierarchy	The following tables present the fair value of the Company’s short-term investments and contingent consideration by valuation hierarchy and input (in thousands): As of March 31, 2021 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable (Level 2) Significant Unobservable (Level 3) Totals Short-term investments: Corporate bonds $ 3,865 $ — $ — $ 3,865 Total assets $ 3,865 $ — $ — $ 3,865 Contingent consideration: Current portion — — (2,324 ) (2,324 ) Non-current portion — — (7,720 ) (7,720 ) Total liabilities $ — $ — $ (10,044 ) $ (10,044 ) As of September 30, 2020 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable (Level 2) Significant Unobservable (Level 3) Totals Non-current contingent consideration $ — $ — $ (10,962 ) $ (10,962 )
Changes in Fair Value of Company Level 3 Financial Instruments	The following table summarizes changes in the fair value of the Company’s Level 3 financial instruments for the six months ended March 31, 2021: Balance at October 1, 2020 $ 10,962 Fair value adjustments (697 ) Balance at December 31, 2020 10,265 Fair value adjustments (221 ) Balance at March 31, 2021 $ 10,044

Trade Accounts and Notes Rece_2

Trade Accounts and Notes Receivable (Tables)	6 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Trade Accounts Receivable, Net	Trade accounts receivable, net (excluding notes receivable) are reflected in the following table (in thousands): March 31, 2021 September 30, 2020 Trade accounts receivable $ 7,606 $ 14,090 Allowance for doubtful accounts (523 ) (496 ) Total $ 7,083 $ 13,594
Notes Receivables, Net	Notes receivable are reflected in the following table (in thousands): March 31, 2021 September 30, 2020 Notes receivable $ 6,525 $ 184 Less current portion (3,448 ) (184 ) Non-current notes receivable $ 3,077 $ —

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Dec. 31, 2020
Inventory Disclosure [Abstract]
Inventories	Inventories consist of the following (in thousands): March 31, 2021 September 30, 2020 Finished goods $ 21,492 $ 20,798 Work in process 4,230 984 Raw materials 49,497 47,041 Obsolescence reserve (35,326 ) (34,960 ) 39,893 33,863 Less current portion (15,313 ) (16,933 ) Non-current portion $ 24,580 $ 16,930

Leases (Tables)

Leases (Tables)	6 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Summary of Maturities of Operating Lease Liabilities	Maturities of the operating lease liabilities as of March 31, 2021 were as follows: (in thousands): For fiscal years ending September 30, 2021 (remainder) $ 120 2022 262 2023 270 2024 278 2025 186 Thereafter 356 Future minimum lease payments 1,472 Less interest 138 Present value of minimum lease payments 1,334 Less current portion 199 Long-term portion $ 1,135
Summary of Lease Costs	Lease costs recognized in the consolidated statements of operations for the three and six months ended March 31, 2021 and 2020 is as follows (in thousands): Three Months Ended Six Months Ended March 31, 2021 March 31, 2020 March 31, 2021 March 31, 2020 Right-of-use operating lease costs $ 73 $ 38 $ 111 $ 75 Short-term lease costs 66 75 140 151 Total $ 139 $ 113 $ 251 $ 226
Summary of Other Information Related to Operating Leases	Other information related to operating leases is as follows (in thousands): Six Months Ended March 31, 2021 March 31, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 91 $ 82 Operating lease assets obtained in exchange for new lease liabilities 1,336 — Weighted average remaining lease term 6.0 years 1.0 year Weighted average discount rate 3.25 % 5.00 %
Rental Equipment	Rental equipment consisted of the following (in thousands): March 31, 2021 September 30, 2020 Rental equipment, primarily wireless recording equipment $ 90,399 $ 114,783 Accumulated depreciation and impairment (52,017 ) (60,466 ) $ 38,382 $ 54,317

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Mar. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Goodwill and Other Intangible Assets	The Company’s consolidated goodwill and other intangible assets consisted of the following (in thousands): Weighted- Average Remaining Useful Lives (in years) March 31, 2021 September 30, 2020 Goodwill $ 4,337 $ 4,337 Other intangible assets: Developed technology 15.4 5,918 5,918 Customer relationships 1.4 3,900 3,900 Trade names 2.4 1,930 1,930 Non-compete agreements 1.5 170 170 Total other intangible assets 8.5 11,918 11,918 Accumulated amortization (4,453 ) (3,587 ) $ 7,465 $ 8,331
Future Estimated Amortization Expense of Other intangible Assets	As of March 31, 2021, future estimated amortization expense of other intangible assets is as follows (in thousands): For fiscal years ending September 30, 2021 (remainder) $ 866 2022 1,624 2023 714 2024 342 2025 329 Thereafter 3,590 $ 7,465

Loss Per Common Share (Tables)

Loss Per Common Share (Tables)	6 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Calculation of Net Loss and Weighted Average Common Shares and Common Equivalent Shares Outstanding for Computation of Loss Per Share	The following table summarizes the calculation of net loss and weighted average common shares and common equivalent shares outstanding for purposes of the computation of loss per share (in thousands, except share and per share data): Three Months Ended Six Months Ended March 31, 2021 March 31, 2020 March 31, 2021 March 31, 2020 Net loss $ (7,184 ) $ (3,811 ) $ (8,234 ) $ (13,093 ) Less: Loss allocable to unvested restricted stock — — — — Loss attributable to common shareholders for diluted earnings per share $ (7,184 ) $ (3,811 ) $ (8,234 ) $ (13,093 ) Weighted average number of common share equivalents: Common shares used in basic loss per share 13,466,614 13,541,404 13,519,638 13,503,486 Common share equivalents outstanding related to stock options and RSUs — — — — Total weighted average common shares and common share equivalents used in diluted loss per share 13,466,614 13,541,404 13,519,638 13,503,486 Loss per share: Basic $ (0.53 ) $ (0.28 ) $ (0.61 ) $ (0.97 ) Diluted $ (0.53 ) $ (0.28 ) $ (0.61 ) $ (0.97 )

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Summary of Company's Segment Information	The following table summarizes the Company’s segment information (in thousands): Three Months Ended Six Months Ended March 31, 2021 March 31, 2020 March 31, 2021 March 31, 2020 Revenue: Oil and Gas Markets $ 16,132 $ 18,434 $ 28,895 $ 29,943 Adjacent Markets 7,595 7,101 14,495 13,200 Emerging Markets 165 372 8,962 469 Total $ 23,892 $ 25,907 $ 52,352 $ 43,612 Income (loss) from operations: Oil and Gas Markets $ (5,465 ) $ 1,310 $ (11,451 ) $ (2,584 ) Adjacent Markets 1,562 1,214 2,822 2,065 Emerging Markets (1,189 ) (2,500 ) 5,290 (3,865 ) Corporate (3,084 ) (3,513 ) (6,296 ) (6,928 ) Total $ (8,176 ) $ (3,489 ) $ (9,635 ) $ (11,312 )

Significant Accounting Polici_3

Significant Accounting Policies - Additional Information (Details)	6 Months Ended
	Mar. 31, 2021USD ($)
Accounting Policies [Abstract]
Cash and cash equivalents held by foreign subsidiaries and branch offices	$ 5,300,000
Transition tax on undistributed earnings of foreign subsidiaries	0
Accumulated foreign earnings	$ 0

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Details) - USD ($)	3 Months Ended				6 Months Ended		12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Unbilled receivables	$ 2,707,000				$ 2,707,000
Deferred contract costs	0				0		$ 0
Revenue	21,604,000			$ 9,517,000	48,326,000	$ 18,600,000
Cost of revenue	23,045,000			18,002,000	$ 44,780,000	33,210,000
Secured Promissory Note
Disaggregation Of Revenue [Line Items]
Value of notes with customer				$ 10,000,000		10,000,000
Term of the notes				3 years
Monthly principal and interest payments				$ 300,000
Frequency of payments				monthly	monthly
Product
Disaggregation Of Revenue [Line Items]
Revenue	12,500,000	$ 0
Cost of revenue		$ 0
Partially financed product sale				$ 12,500,000
Payments received from customer					$ 6,100,000
Deferred Revenue and Other Liabilities
Disaggregation Of Revenue [Line Items]
Deferred contract liabilities	0				0		200,000
Deferred Contract Liability
Disaggregation Of Revenue [Line Items]
Revenue	0			0	200,000	0
Cost of revenue	0			$ 0	0	$ 0
U.S. Customs and Border Protection ("CBP")
Disaggregation Of Revenue [Line Items]
Awarded contract amount			$ 10,500,000
Increase in contract amount			$ 300,000
Revenue recognized under the contract					8,900,000		$ 300,000
Unbilled receivables	2,700,000				2,700,000
Revenue for unsatisfied performance obligations	$ 1,300,000				$ 1,300,000

Revenue Recognition - Additio_2

Revenue Recognition - Additional Information (Details 1)	Mar. 31, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-04-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Unsatisfied performance obligation, expected timing of satisfaction, period	1 year

Revenue Recognition - Summary o

Revenue Recognition - Summary of Revenue from the Sale of Products and Performance of Services Under Contracts with Customers Excludes All Revenue Earned from Rental Contracts by Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Total revenue	$ 21,604	$ 9,517	$ 48,326	$ 18,600
Operating Segments
Disaggregation Of Revenue [Line Items]
Total revenue	21,604	9,517	48,326	18,600
Operating Segments | Oil and Gas Markets
Disaggregation Of Revenue [Line Items]
Total revenue	13,885	2,073	24,940	4,987
Operating Segments | Oil and Gas Markets | Traditional Exploration Product Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	790	1,257	1,787	3,587
Operating Segments | Oil and Gas Markets | Wireless Exploration Product Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	12,630	479	22,659	883
Operating Segments | Oil and Gas Markets | Reservoir Product Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	465	337	494	517
Operating Segments | Adjacent Markets
Disaggregation Of Revenue [Line Items]
Total revenue	7,554	7,072	14,424	13,144
Operating Segments | Adjacent Markets | Industrial Product Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	4,977	4,186	9,384	7,782
Operating Segments | Adjacent Markets | Imaging Product Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	2,577	2,886	5,040	5,362
Operating Segments | Emerging Markets
Disaggregation Of Revenue [Line Items]
Total revenue	$ 165	$ 372	$ 8,962	$ 469

Revenue Recognition - Summary_2

Revenue Recognition - Summary of Revenue from the Sale of Products and Services Under Contracts with Customers Excludes All Revenue Earned from Rental Contracts by Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Total revenue	$ 21,604	$ 9,517	$ 48,326	$ 18,600
Operating Segments
Disaggregation Of Revenue [Line Items]
Total revenue	21,604	9,517	48,326	18,600
Operating Segments | Asia
Disaggregation Of Revenue [Line Items]
Total revenue	1,093	830	12,466	1,275
Operating Segments | Canada
Disaggregation Of Revenue [Line Items]
Total revenue	481	794	888	1,267
Operating Segments | Europe
Disaggregation Of Revenue [Line Items]
Total revenue	1,704	1,259	2,879	2,672
Operating Segments | United States
Disaggregation Of Revenue [Line Items]
Total revenue	18,055	6,184	31,419	12,781
Operating Segments | Other
Disaggregation Of Revenue [Line Items]
Total revenue	$ 271	$ 450	$ 674	$ 605

Investments - Additional Inform

Investments - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Sep. 30, 2020	Jul. 13, 2020
Schedule Of Available For Sale Securities [Line Items]
Realized gains (losses)		$ 0	$ 0	$ 0	$ 0
Short-term investments						$ 0
Proceeds from investment security transaction				$ 269,000
Debt Security
Schedule Of Available For Sale Securities [Line Items]
Proceeds from investment security transaction	$ 300,000
Additional cash compensation to be received based on conditions met	2,400,000
Repurchase price of bond if conditions not met	$ 1
Gain on investment		$ 300,000
Debt Security | Third in Line lien on Assets | International Seismic Marine
Schedule Of Available For Sale Securities [Line Items]
Estimated Fair Value							$ 13,000,000
Unpaid invoices and later fees owed by customer							$ 13,000,000
Debt instrument, description				The bond is secured by a third in line lien on the assets owned by the customer and has an 8% interest rate with bi-annual interest and possible principal payments based on available excess cash flows.  Interest payments can be made either in cash or in-kind payments in the form of additional debt security.  In-kind interest payments require an 8.8% interest rate.
Investment interest rate							8.00%
In-kind payments, interest rate							8.80%
Maturity date							Jul. 13, 2022
Minimum
Schedule Of Available For Sale Securities [Line Items]
Short-term investments maturity date		Sep. 30, 2021		Sep. 30, 2021
Maximum
Schedule Of Available For Sale Securities [Line Items]
Short-term investments maturity date		May 31, 2022		May 31, 2022

Investments - Summary of Short-

Investments - Summary of Short-Term Investments (Details) - Corporate Bonds $ in Thousands	Mar. 31, 2021USD ($)
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 3,868
Unrealized Gains	(3)
Estimated Fair Value	$ 3,865

Fair Value of Company's Short-T

Fair Value of Company's Short-Term Investment and Contingent Consideration by Valuation Hierarchy (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	$ 3,865
Current portion	(2,324)
Non-current portion	(7,720)	$ (10,962)
Total liabilities	(10,044)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	3,865
Significant Unobservable (Level 3)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Current portion	(2,324)
Non-current portion	(7,720)	$ (10,962)
Total liabilities	(10,044)
Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	3,865
Corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets	$ 3,865

Changes in Fair Value of Compan

Changes in Fair Value of Company Level 3 Financial Instruments (Details) - Nonrecurring - Significant Unobservable (Level 3) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance	$ 10,265	$ 10,962
Fair value adjustments	(221)	(697)
Balance	$ 10,044	$ 10,265

Trade Accounts and Notes Rece_3

Trade Accounts and Notes Receivable - Trade Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Current trade accounts receivable
Trade accounts receivable	$ 7,606	$ 14,090
Allowance for doubtful accounts	(523)	(496)
Total	$ 7,083	$ 13,594

Trade Accounts and Notes Rece_4

Trade Accounts and Notes Receivable - Summary of Notes Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Receivables [Abstract]
Notes receivable	$ 6,525	$ 184
Less current portion	(3,448)	$ (184)
Non-current notes receivable	$ 3,077

Trade Accounts and Notes Rece_5

Trade Accounts and Notes Receivable - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Mar. 31, 2020	Mar. 31, 2021
Accounts Notes And Loans Receivable [Line Items]
Promissory notes receivable maturity month and year			2023-01
Secured Promissory Note
Accounts Notes And Loans Receivable [Line Items]
Value of notes with customer		$ 10
Term of the notes		3 years
Monthly principal and interest payments		$ 0.3
Frequency of payments		monthly	monthly
Short-Term Promissory Note
Accounts Notes And Loans Receivable [Line Items]
Value of notes with customer	$ 13.2
Interest rate of the notes	8.00%
Maturity date	Mar. 31, 2021
Manufactured Rental Equipment
Accounts Notes And Loans Receivable [Line Items]
Promissory notes receivable maximum interest rate			8.00%
Product
Accounts Notes And Loans Receivable [Line Items]
Partially financed product sale		$ 12.5

Inventories - Inventories (Deta

Inventories - Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Inventory Disclosure [Abstract]
Finished goods	$ 21,492	$ 20,798
Work in process	4,230	984
Raw materials	49,497	47,041
Obsolescence reserve	(35,326)	(34,960)
Total	39,893	33,863
Less current portion	(15,313)	(16,933)
Non-current portion	$ 24,580	$ 16,930

Inventories - Additional Inform

Inventories - Additional Information (Details) - USD ($) $ in Millions	Mar. 31, 2021	Sep. 30, 2020
Inventory Disclosure [Abstract]
Raw materials include semi-finished goods and component parts	$ 28.5	$ 24.3

Leases - Additional Information

Leases - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021USD ($)OperatingRightOfUseAsset	Mar. 31, 2020USD ($)	Mar. 31, 2021USD ($)OperatingRightOfUseAsset	Mar. 31, 2020USD ($)	Sep. 30, 2020USD ($)
Leases [Line Items]
Lease receivables from customers, net of reserves	$ 1,800		$ 1,800
Rental revenue	2,288	$ 16,390	4,026	$ 25,012
Future minimum lease payments to be received	7,100		7,100
Assets held for sale	$ 1,732		$ 1,732		$ 587
Sales type of lease term	6 months		6 months
Rental Equipment
Leases [Line Items]
Assets held for sale	$ 1,300		$ 1,300
Maximum
Leases [Line Items]
Lease term	6 months		6 months
Austin, Texas
Leases [Line Items]
Number of operating right-of use asset related to leased facility | OperatingRightOfUseAsset	2		2

Leases - Summary of Maturities

Leases - Summary of Maturities of Operating Lease Liabilities (Details) $ in Thousands	Mar. 31, 2021USD ($)
Leases [Abstract]
2021 (remainder)	$ 120
2022	262
2023	270
2024	278
2025	186
Thereafter	356
Future minimum lease payments	1,472
Less interest	138
Present value of minimum lease payments	1,334
Less current portion	199
Long-term portion	$ 1,135

Leases - Summary of Lease Costs

Leases - Summary of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Right-of-use operating lease costs	$ 73	$ 38	$ 111	$ 75
Short-term lease costs	66	75	140	151
Total	$ 139	$ 113	$ 251	$ 226

Leases - Summary of Other Infor

Leases - Summary of Other Information Related to Operating Leases (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating cash flows from operating leases	$ 91	$ 82
Operating lease assets obtained in exchange for new lease liabilities	$ 1,336
Weighted average remaining lease term	6 years	1 year
Weighted average discount rate	3.25%	5.00%

Leases - Rental Equipment (Deta

Leases - Rental Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Rental Equipment [Abstract]
Rental equipment, primarily wireless recording equipment	$ 90,399	$ 114,783
Accumulated depreciation and impairment	(52,017)	(60,466)
Rental equipment, net	$ 38,382	$ 54,317

Assets Held for Sale - Addition

Assets Held for Sale - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Assets held for sale	$ 1,732	$ 587
Property, Plant and Equipment
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Assets held for sale	500	$ 600
Rental Equipment
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Assets held for sale	$ 1,300

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Sep. 30, 2020
Goodwill And Other Intangible Assets [Line Items]
Goodwill	$ 4,337	$ 4,337
Total other intangible assets	11,918	11,918
Accumulated amortization	(4,453)	(3,587)
Other intangible assets, net	$ 7,465	8,331
Weighted-Average Remaining Useful Lives (in years)	8 years 6 months
Developed Technology
Goodwill And Other Intangible Assets [Line Items]
Total other intangible assets	$ 5,918	5,918
Weighted-Average Remaining Useful Lives (in years)	15 years 4 months 24 days
Customer Relationships
Goodwill And Other Intangible Assets [Line Items]
Total other intangible assets	$ 3,900	3,900
Weighted-Average Remaining Useful Lives (in years)	1 year 4 months 24 days
Trade Names
Goodwill And Other Intangible Assets [Line Items]
Total other intangible assets	$ 1,930	1,930
Weighted-Average Remaining Useful Lives (in years)	2 years 4 months 24 days
Non-compete Agreements
Goodwill And Other Intangible Assets [Line Items]
Total other intangible assets	$ 170	$ 170
Weighted-Average Remaining Useful Lives (in years)	1 year 6 months

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense	$ 400	$ 400	$ 866	$ 866

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Future Estimated Amortization Expense Of Other intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
2021 (remainder)	$ 866
2022	1,624
2023	714
2024	342
2025	329
Thereafter	3,590
Other intangible assets, net	$ 7,465	$ 8,331

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Details) $ / shares in Units, $ in Millions	6 Months Ended
	Mar. 31, 2021USD ($)$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Nonqualified stock options unvested and outstanding	38,800
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share unvested and outstanding	334,687
Restricted Stock Units (RSUs) | 2014 Long Term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issued	189,950
Weighted average grant date fair value of the restricted stock | $ / shares	$ 6.96
Grant date fair value of restricted stock | $	$ 1.3
Restricted stock restriction period	4 years
Restricted stock units vesting rights	Each RSU represents a contingent right to receive one share of the Company’s common stock upon vesting.
Unrecognized compensation expense | $	$ 3.1
Expected period for recognition of unrecognized compensation expense	2 years 9 months 18 days
Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense | $	$ 0.5
Expected period for recognition of unrecognized compensation expense	10 months 24 days
Share unvested and outstanding	48,847

Loss Per Common Share - Calcula

Loss Per Common Share - Calculation of Net Loss and Weighted Average Common Shares and Common Equivalent Shares Outstanding for Computation of Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net loss	$ (7,184)	$ (1,050)	$ (3,811)	$ (9,282)	$ (8,234)	$ (13,093)
Loss attributable to common shareholders for diluted earnings per share	$ (7,184)		$ (3,811)		$ (8,234)	$ (13,093)
Weighted average number of common share equivalents:
Common shares used in basic loss per share	13,466,614		13,541,404		13,519,638	13,503,486
Total weighted average common shares and common share equivalents used in diluted loss per share	13,466,614		13,541,404		13,519,638	13,503,486
Loss per share:
Basic	$ (0.53)		$ (0.28)		$ (0.61)	$ (0.97)
Diluted	$ (0.53)		$ (0.28)		$ (0.61)	$ (0.97)

Loss Per Common Share - Additio

Loss Per Common Share - Additional Information (Details) - shares	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Number of stock excluded from calculation of weighted average shares outstanding	38,800	103,100	38,800	103,100
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Number of stock excluded from calculation of weighted average shares outstanding	334,687	265,220	334,687	265,220

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	Nov. 13, 2018	Jul. 27, 2018	Sep. 30, 2021	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Sep. 30, 2020
Commitments And Contingencies [Line Items]
Contingent earn-out liability				$ 7,720		$ 7,720		$ 10,962
Change in estimated fair value of contingent consideration				(221)	$ 972	(918)	$ 972
Future minimum lease obligations				$ 1,472		$ 1,472
Maximum
Commitments And Contingencies [Line Items]
Operating lease term				7 years		7 years
Quantum
Commitments And Contingencies [Line Items]
Contingent earn-out liability		$ 7,700
Contingent payments earn-out period		4 years
Contingent payments earn-out period ending month and year		2022-07
Contingent payments maximum earn-out amount		$ 23,500
Contingent earn-out liability								5,800
Change in estimated fair value of contingent consideration						$ 800
Estimated fair value of earn-out liability				$ 5,000		5,000
Contingent earn-out cash payment								100
Quantum | Scenario Forecast
Commitments And Contingencies [Line Items]
Contingent earn-out additional payment			$ 2,300
Optoseis Technology
Commitments And Contingencies [Line Items]
Contingent earn-out liability	$ 4,300
Contingent payments earn-out period	5 years 6 months
Contingent payments earn-out period ending month and year	2024-05
Contingent payments maximum earn-out amount	$ 23,200
Contingent earn-out liability								$ 5,200
Change in estimated fair value of contingent consideration						100
Estimated fair value of earn-out liability				$ 5,100		$ 5,100

Segment Information - Additiona

Segment Information - Additional Information (Details)	6 Months Ended
	Mar. 31, 2021Segment
Segment Reporting [Abstract]
Number of operating segments	3

Segment Information - Summary o

Segment Information - Summary of Company's Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenue	$ 23,892	$ 25,907	$ 52,352	$ 43,612
Income (loss) from operations	(8,176)	(3,489)	(9,635)	(11,312)
Operating Segments | Oil and Gas Markets
Segment Reporting Information [Line Items]
Revenue	16,132	18,434	28,895	29,943
Income (loss) from operations	(5,465)	1,310	(11,451)	(2,584)
Operating Segments | Adjacent Markets
Segment Reporting Information [Line Items]
Revenue	7,595	7,101	14,495	13,200
Income (loss) from operations	1,562	1,214	2,822	2,065
Operating Segments | Emerging Markets
Segment Reporting Information [Line Items]
Revenue	165	372	8,962	469
Income (loss) from operations	(1,189)	(2,500)	5,290	(3,865)
Corporate
Segment Reporting Information [Line Items]
Income (loss) from operations	$ (3,084)	$ (3,513)	$ (6,296)	$ (6,928)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income tax expense	$ 61	$ 607	$ 119	$ 2,027

Risks and Uncertainties - Addit

Risks and Uncertainties - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021USD ($)Customer	Mar. 31, 2020USD ($)	Mar. 31, 2021USD ($)Customer	Mar. 31, 2020USD ($)
Concentration Risk [Line Items]
Unbilled receivables current	$ 2,707		$ 2,707
Revenue	21,604	$ 9,517	48,326	$ 18,600
Customer
Concentration Risk [Line Items]
Proceeds from accounts receivable			6,900
Proceeds from notes receivable			4,200
Unbilled receivables current	$ 1,000		$ 1,000
Number of customers | Customer	3		3
Revenue | Customer
Concentration Risk [Line Items]
Number of customers | Customer	3		3
Revenue | Customer | Unbilled Receivables
Concentration Risk [Line Items]
Revenue			$ 8,900
Revenue | Trade Accounts Receivable | Customer
Concentration Risk [Line Items]
Revenue			13,200
Revenue | Notes Receivable | Customer
Concentration Risk [Line Items]
Revenue			$ 12,700