Significant Accounting Policies	9 Months Ended
Jun. 30, 2019
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, 2018 was derived from the Company’s audited consolidated financial statements at that date. The consolidated balance sheet at June 30, 2019 and the consolidated statements of operations, comprehensive loss, stockholders’ equity and cash flows for the three and nine months ended June 30, 2019 and 2018 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. The results of operations for the three and nine months ended June 30, 2019 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, 2018. 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 consolidated financial statements. The Company continually evaluates its estimates, including those related to bad debt reserves, inventory obsolescence reserves, self-insurance reserves, product warranty reserves, impairment of long-lived assets 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. 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 June 30, 2019, cash and cash equivalents included $7.5 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 would be required to accrue and pay taxes on any amount repatriated under rates enacted by The Tax Cuts and Jobs Act (“2017 Tax Act”). Recently Adopted Accounting Pronouncements In November 2016, the Financial Accounting Standards Board (“FASB”) issued guidance which requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This guidance was adopted by the Company in its first quarter of fiscal year 2019. The adoption of this guidance had no effect on the Company’s consolidated financial statements since it currently holds no restricted cash balances. In May 2014, the FASB issued guidance requiring entities to recognize revenue from contracts with customers by applying a five-step model in accordance with the core principle to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In addition, this guidance specifies the accounting for some costs to obtain or fulfill a contract with a customer and expands disclosure requirements for revenue recognition. This new standard supersedes existing revenue recognition guidance and requires changes to the revenue recognition process, financial statement presentation and footnote disclosures. The Company adopted this standard on October 1, 2018 using the modified retrospective method. The adoption of this standard did not result in a cumulative adjustment as of October 1, 2018 nor did it have any impact on the Company’s consolidated financial statements. Recently Issued Accounting Pronouncements In June 2018, the FASB issued guidance expanding the scope of ASC Topic 718, Compensation - Stock Compensation, to include share-based payment transactions for acquiring goods and services from nonemployees. The guidance is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years with early adoption permitted. The Company will adopt this guidance in its first quarter of its fiscal year ending September 30, 2020 and does not expect the adoption of this guidance to have any material impact on its consolidated financial statements. In August 2018, the FASB issued guidance requiring certain existing disclosure requirements in ASC Topic 820, Fair Value Measurements and Disclosures, to be modified or removed, and certain new disclosure requirements to be added to this standard. In addition, the guidance allows entities to exercise more discretion when considering fair value measurement disclosures. The guidance is effective for fiscal years beginning after December 15, 2019 with early adoption permitted. The Company is in the process of evaluating the impact of this guidance on its consolidated financial statements. In January 2017, the FASB issued guidance simplifying the current two-step goodwill impairment test by eliminating Step 2 of the test. The guidance requires a one-step impairment test in which an entity compares the fair value of a reporting unit with its carrying amount and recognizes an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value, if any. This guidance is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years, and should be applied on a prospective basis. Early adoption is permitted for the interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company does not expect the adoption of this guidance to have an impact on its consolidated financial statements and disclosures. In June 2016, the FASB issued guidance surrounding credit losses for financial instruments that replaces the incurred loss impairment methodology in generally accepted accounting principles (“GAAP”). 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. The standard is effective for fiscal years reporting periods beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption for a fiscal year beginning after December 15, 2018 is permitted. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first effective reporting period. The Company expects to adopt this standard during the first quarter of its fiscal year ending September 30, 2021 and is currently evaluating the impact of this new guidance on its consolidated financial statements. In February 2016, the FASB issued guidance requiring a lessee to recognize assets and liabilities for leases with lease terms of more than 12 months. Consistent with current GAAP, the recognition, measurement and presentation of expense and cash flows arising from a lease by a lessee primarily will depend on its classification of the lease as a finance or operating lease. However, unlike current GAAP, which requires only capital leases to be recognized on the balance sheet, the new guidance will also require operating leases of the lessee to be recognized on the balance sheet if the operating lease term is more than 12 months. The guidance also requires disclosures to help investors and other financial statement users to better understand the amount, timing and uncertainty of cash flows arising from leases. These disclosures include qualitative and quantitative requirements, providing additional information about the amounts recorded in the financial statements. The guidance is effective for fiscal years, and interim reporting periods therein, beginning after December 15, 2018 and is to be applied using the modified retrospective approach. The Company will adopt this guidance in its first quarter of its fiscal year ending September 30, 2020. Effective May 1, 2019, the Company became a lessee under an office lease agreement with a term longer than one year and will follow the guidance of the new standard regarding this lease contract. In addition, the Company is routinely a lessor in its rental contracts with customers. The minimum rental term of these rental contracts is generally less than one year, and the Company expects these contracts will be treated as operating leases under the new guidance. The Company does not expect the adoption of this guidance to have a material impact on its consolidated financial statements.

Significant Accounting Policies

9 Months Ended

Jun. 30, 2019

1. Significant Accounting Policies

Basis of Presentation

The consolidated balance sheet of Geospace Technologies Corporation and its subsidiaries (the “Company”) at September 30, 2018 was derived from the Company’s audited consolidated financial statements at that date. The consolidated balance sheet at June 30, 2019 and the consolidated statements of operations, comprehensive loss, stockholders’ equity and cash flows for the three and nine months ended June 30, 2019 and 2018 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. The results of operations for the three and nine months ended June 30, 2019 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, 2018.

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 consolidated financial statements. The Company continually evaluates its estimates, including those related to bad debt reserves, inventory obsolescence reserves, self-insurance reserves, product warranty reserves, impairment of long-lived assets 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. 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 June 30, 2019, cash and cash equivalents included $7.5 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 would be required to accrue and pay taxes on any amount repatriated under rates enacted by The Tax Cuts and Jobs Act (“2017 Tax Act”).

Recently Adopted Accounting Pronouncements

In November 2016, the Financial Accounting Standards Board (“FASB”) issued guidance which requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This guidance was adopted by the Company in its first quarter of fiscal year 2019. The adoption of this guidance had no effect on the Company’s consolidated financial statements since it currently holds no restricted cash balances.

In May 2014, the FASB issued guidance requiring entities to recognize revenue from contracts with customers by applying a five-step model in accordance with the core principle to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In addition, this guidance specifies the accounting for some costs to obtain or fulfill a contract with a customer and expands disclosure requirements for revenue recognition. This new standard supersedes existing revenue recognition guidance and requires changes to the revenue recognition process, financial statement presentation and footnote disclosures. The Company adopted this standard on October 1, 2018 using the modified retrospective method. The adoption of this standard did not result in a cumulative adjustment as of October 1, 2018 nor did it have any impact on the Company’s consolidated financial statements.

Recently Issued Accounting Pronouncements

In June 2018, the FASB issued guidance expanding the scope of ASC Topic 718, Compensation - Stock Compensation, to include share-based payment transactions for acquiring goods and services from nonemployees. The guidance is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years with early adoption permitted. The Company will adopt this guidance in its first quarter of its fiscal year ending September 30, 2020 and does not expect the adoption of this guidance to have any material impact on its consolidated financial statements.

In August 2018, the FASB issued guidance requiring certain existing disclosure requirements in ASC Topic 820, Fair Value Measurements and Disclosures, to be modified or removed, and certain new disclosure requirements to be added to this standard. In addition, the guidance allows entities to exercise more discretion when considering fair value measurement disclosures. The guidance is effective for fiscal years beginning after December 15, 2019 with early adoption permitted. The Company is in the process of evaluating the impact of this guidance on its consolidated financial statements.

In January 2017, the FASB issued guidance simplifying the current two-step goodwill impairment test by eliminating Step 2 of the test. The guidance requires a one-step impairment test in which an entity compares the fair value of a reporting unit with its carrying amount and recognizes an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value, if any. This guidance is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years, and should be applied on a prospective basis. Early adoption is permitted for the interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company does not expect the adoption of this guidance to have an impact on its consolidated financial statements and disclosures.

In June 2016, the FASB issued guidance surrounding credit losses for financial instruments that replaces the incurred loss impairment methodology in generally accepted accounting principles (“GAAP”). 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. The standard is effective for fiscal years reporting periods beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption for a fiscal year beginning after December 15, 2018 is permitted. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first effective reporting period. The Company expects to adopt this standard during the first quarter of its fiscal year ending September 30, 2021 and is currently evaluating the impact of this new guidance on its consolidated financial statements.

In February 2016, the FASB issued guidance requiring a lessee to recognize assets and liabilities for leases with lease terms of more than 12 months. Consistent with current GAAP, the recognition, measurement and presentation of expense and cash flows arising from a lease by a lessee primarily will depend on its classification of the lease as a finance or operating lease. However, unlike current GAAP, which requires only capital leases to be recognized on the balance sheet, the new guidance will also require operating leases of the lessee to be recognized on the balance sheet if the operating lease term is more than 12 months. The guidance also requires disclosures to help investors and other financial statement users to better understand the amount, timing and uncertainty of cash flows arising from leases. These disclosures include qualitative and quantitative requirements, providing additional information about the amounts recorded in the financial statements. The guidance is effective for fiscal years, and interim reporting periods therein, beginning after December 15, 2018 and is to be applied using the modified retrospective approach. The Company will adopt this guidance in its first quarter of its fiscal year ending September 30, 2020. Effective May 1, 2019, the Company became a lessee under an office lease agreement with a term longer than one year and will follow the guidance of the new standard regarding this lease contract. In addition, the Company is routinely a lessor in its rental contracts with customers. The minimum rental term of these rental contracts is generally less than one year, and the Company expects these contracts will be treated as operating leases under the new guidance. The Company does not expect the adoption of this guidance to have a material impact on its consolidated financial statements.