Note 3 - Recent Accounting Pronouncements	6 Months Ended
Mar. 31, 2018
Notes to Financial Statements
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	3. RECENT ACCOUNTING PRONOUNCEMENTS In November 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2016 - 18, Statement of Cash Flows (Topic 230 ), Restricted Cash ("ASU 2016 - 18" ), which amends Topic 230 to add or clarify guidance on the classification and presentation of restricted cash in the statement of cash flows. The standard 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. The provisions of this guidance are to be applied using a retrospective transition method to each period presented. ASU 2016 - 18 is effective for annual reporting periods beginning after December 15, 2017, and interim periods within those years, with early adoption permitted. The Company adopted ASU 2016 - 18 effective January 1, 2018. For the six months ended March 31, 2018, the increase in restricted cash resulted primarily from restricted cash balances included in the assets acquired in the acquisition of Genasys, as described in Note 4. The adoption did not have a material impact on the Company's consolidated financial position, results of operations and cash flows, other than the impact discussed above. In March 2016, the FASB issued ASU No. 2016 - 09, Compensation – Stock Compensation (Topic 718 ): Improvements to Employee Share-Based Payment Accounting . This guidance changes how companies account for certain aspects of share-based payments to employees. Among other things, under the new guidance, companies will no longer record excess tax benefits and certain tax deficiencies in additional paid-in-capital (“APIC”), but will instead record such items as income tax expense or benefit in the income statement, and APIC pools will be eliminated. Companies will apply this guidance prospectively. Another component of the new guidance allows companies to make an accounting policy election for the impact of forfeitures on the recognition of expense for share-based payment awards, whereby forfeitures can be estimated, as required today, or recognized when they occur. If elected, the change to recognize forfeitures when they occur needs to be adopted using a modified retrospective approach. The guidance was effective for the Company in the first quarter of fiscal 2018. The adoption of this standard resulted in the recognition of $1.1 million of gross deferred tax assets related to the historical excess tax benefits from stock-based compensation that was not previously included in deferred tax assets and a corresponding increase in the Company’s valuation allowance. In February 2016, the FASB issued ASU 2016 - 02, Leases (Topic 842 ) , which issued new guidance related to leases that outlines a comprehensive lease accounting model and supersedes the current lease guidance. The new guidance requires lessees to recognize lease liabilities and corresponding right-of-use assets for all leases with lease terms of greater than 12 months. It also changes the definition of a lease and expands the disclosure requirements of lease arrangements. The new guidance must be adopted using the modified retrospective approach and will be effective for the Company in the fiscal year beginning October 1, 2019. Early adoption is permitted. The Company is currently evaluating the impact of this guidance, if any, on its consolidated financial statements and related disclosures. In May 2014, the FASB issued ASU No. 2014 - 09, Revenue from Contracts with Customers (“ASU 2014 - 09” ), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU 2014 - 09 will replace most existing revenue recognition guidance in U.S. generally accepted accounting principles when it becomes effective. In July 2015, the FASB deferred the effective date of the standard by an additional year; however, it provided companies the option to adopt one year earlier, commensurate with the original effective date. Accordingly, the standard will be effective for the Company in the fiscal year beginning October 1, 2018. The Company is currently evaluating the impact of this guidance, if any, on its consolidated financial statements and related disclosures.

RECENT ACCOUNTING PRONOUNCEMENTS

November 2016,

the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update

No.

2016

18,

Statement of Cash Flows (Topic

230

), Restricted Cash

("ASU

2016

18"

), which amends Topic

230

to add or clarify guidance on the classification and presentation of restricted cash in the statement of cash flows. The standard 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. The provisions of this guidance are to be applied using a retrospective transition method to each period presented. ASU

2016

is effective for annual reporting periods beginning after

December 15, 2017,

and interim periods within those years, with early adoption permitted. The Company adopted ASU

2016

effective

January 1, 2018.

For the

six

months ended

March 31, 2018,

the increase in restricted cash resulted primarily from restricted cash balances included in the assets acquired in the acquisition of Genasys, as described in Note

The adoption did

not

have a material impact on the Company's consolidated financial position, results of operations and cash flows, other than the impact discussed above.

March 2016,

the FASB issued ASU

No.

2016

09,

Compensation – Stock Compensation (Topic

718

): Improvements to Employee Share-Based Payment Accounting

. This guidance changes how companies account for certain aspects of share-based payments to employees. Among other things, under the new guidance, companies will

longer record excess tax benefits and certain tax deficiencies in additional paid-in-capital (“APIC”), but will instead record such items as income tax expense or benefit in the income statement, and APIC pools will be eliminated. Companies will apply this guidance prospectively. Another component of the new guidance allows companies to make an accounting policy election for the impact of forfeitures on the recognition of expense for share-based payment awards, whereby forfeitures can be estimated, as required today, or recognized when they occur. If elected, the change to recognize forfeitures when they occur needs to be adopted using a modified retrospective approach. The guidance was effective for the Company in the

first

quarter of fiscal

2018.

The adoption of this standard resulted in the recognition of

$1.1

million of gross deferred tax assets related to the historical excess tax benefits from stock-based compensation that was

not

previously included in deferred tax assets and a corresponding increase in the Company’s valuation allowance.

February 2016,

the FASB issued ASU

2016

02,

Leases (Topic

842

)

, which issued new guidance related to leases that outlines a comprehensive lease accounting model and supersedes the current lease guidance. The new guidance requires lessees to recognize lease liabilities and corresponding right-of-use assets for all leases with lease terms of greater than

months. It also changes the definition of a lease and expands the disclosure requirements of lease arrangements. The new guidance must be adopted using the modified retrospective approach and will be effective for the Company in the fiscal year beginning

October 1, 2019.

Early adoption is permitted. The Company is currently evaluating the impact of this guidance, if any, on its consolidated financial statements and related disclosures.

May 2014,

the FASB issued ASU

No.

2014

09,

Revenue from Contracts with Customers

(“ASU

2014

09”

), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU

2014

will replace most existing revenue recognition guidance in U.S. generally accepted accounting principles when it becomes effective. In

July 2015,

the FASB deferred the effective date of the standard by an additional year; however, it provided companies the option to adopt

one

year earlier, commensurate with the original effective date. Accordingly, the standard will be effective for the Company in the fiscal year beginning

October 1, 2018.

The Company is currently evaluating the impact of this guidance, if any, on its consolidated financial statements and related disclosures.