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Significant Accounting Policies (Policies)
12 Months Ended
Jan. 28, 2017
Accounting Policies [Abstract]  
Basis of Accounting, Policy [Policy Text Block]
Basis of presentation:  
The consolidated financial statements include the accounts of Sigma Designs, Inc. and its wholly-owned subsidiaries.  All significant intercompany balances and transactions have been eliminated. In
November
2015,
we completed our acquisition of Bretelon, Inc. (“Bretelon”). The consolidated financial statements include the results of operations of Bretelon commencing as of the acquisition date.
Fiscal Period, Policy [Policy Text Block]
Accounting period:  
We follow a
52
or
53
-week fiscal reporting calendar ending on the Saturday closest to
January
31
each year. Our most recent fiscal year, fiscal
2017,
ended on
January
28,
2017,
included
52
weeks. The fiscal years
2016
and
2015,
ended
January
30,
2016
and
January
31,
2015
each included
52
weeks. Our next fiscal year, ending on
February
3,
2018,
will include
53
weeks.
Use of Estimates, Policy [Policy Text Block]
Use of estimates in the preparation of financial statements:  
The financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The preparation of the consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period.  The primary areas that require significant estimates and judgments by management include, but are not limited to, revenue recognition, allowances for doubtful accounts, sales returns, warranty obligations, inventory valuation, stock-based compensation expense, purchased intangible asset valuations, strategic investments, deferred income tax asset valuation allowances, uncertain tax positions, tax contingencies, restructuring costs, litigation and other loss contingencies. Our estimates and related judgments and assumptions are continually evaluated based on historical experience and various other factors that we believe to be reasonable under the circumstances, however, actual results could differ from those estimates, and such differences
may
be material to our consolidated financial statements. 
Costs Associated with Exit or Disposal Activities or Restructurings, Policy [Policy Text Block]
Restructuring charges:
Our restructuring charges include primarily payments to employees for severance, asset impairment charges, termination fees associated with leases and other contracts and other costs related to the closure of facilities. Accruals are recorded when management has approved a plan to restructure operations and a liability has been incurred. The restructuring accruals are based upon management estimates at the time they are recorded. These estimates can change depending upon changes in facts and circumstances subsequent to the date the original liability was recorded. During fiscal
2016
and
2015,
we recorded restructuring charges of less than
$0.1
million and
$1.1
million, respectively. We incurred
no
restructuring charges in fiscal
2017.
Fair Value Measurement, Policy [Policy Text Block]
Fair value of financial instruments: 
We measure and disclose certain financial assets and liabilities at fair value defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC Topic
820
also establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes
three
levels of inputs that
may
be used to measure fair value:
 
 
Level
1
Quoted prices in active markets for identical assets or liabilities
Level
2
Observable inputs other than Level
1
prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level
3
Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
 
For certain of our assets and liabilities, including cash and cash equivalents, accounts receivable, accounts payable and other current liabilities, the carrying amounts approximate their fair value due to the relatively short maturity of these items.  Marketable securities consist of available-for-sale securities that are reported at fair value with the related unrealized gains and losses included in accumulated other comprehensive income (loss), a component of shareholders’ equity.  The fair value of cash equivalents and certain marketable securities is determined based on “Level 
1”
inputs, which consist of quoted prices in active markets for identical assets.  
 
In accordance with the fair value accounting requirements, companies
may
choose to measure eligible financial instruments and certain other items at fair value. We have not elected the fair value option for any eligible financial instruments.
Derivatives, Policy [Policy Text Block]
Derivative financial instruments:
We are exposed to certain foreign currency risk. Prior to fiscal
2015,
we used foreign exchange contracts to hedge certain existing and anticipated foreign currency denominated transactions in the normal course of business and
may
do so in the future. 
We account for our financial derivatives as either assets or liabilities and carry them at fair value.  We do not use derivative financial instruments for speculative or trading purposes, nor do we hold or issue leveraged derivative financial instruments. Unrealized gains and losses arising from the effective portion of foreign exchange contracts that are designated as cash flow hedging instruments are recorded in accumulated other comprehensive income (loss) and are subsequently reclassified into earnings in the same period or periods during which the underlying transactions affect earnings.  Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings.  Gains and losses arising from changes in the fair values of foreign exchange contracts that are not designated as hedging instruments are recognized in current earnings.
Cash and Cash Equivalents, Policy [Policy Text Block]
Cash and cash equivalents:  
All highly liquid investments with remaining maturity date at the end of each reporting period of
90
days or less are classified as cash equivalents.
Marketable Securities, Policy [Policy Text Block]
Short and long-term marketable securities:  
Short-term marketable securities represent highly liquid investments with a remaining maturity date at the end of each reporting period of greater than
90
days but less than
one
year and are stated at fair value. Long-term marketable securities represent securities with contractual maturities greater than
one
year from the date of purchase. We classify our marketable securities as available-for-sale because the sale of such securities
may
be required prior to maturity. Management determines the appropriate classification of its investments at the time of purchase and reevaluates the designations at each balance sheet date.
 
The difference between amortized cost (cost adjusted for amortization of premiums and accretion of discounts, which is recognized as an adjustment to interest income) and fair value, representing unrealized holding gains or losses, are recorded separately as a component of accumulated other comprehensive income (loss) within shareholders’ equity. Any gains and losses on the sale of marketable securities are determined based on the specific identification method. 
 
We monitor all of our marketable securities for impairment and if these securities are reported to have a decline in fair value, we use significant judgment to identify events or circumstances that would likely have a significant adverse effect on the future value of each investment including: (i) the nature of the investment; (ii) the cause and duration of any impairment; (iii) the financial condition and future prospects of the issuer; (iv) for securities with a reported decline in fair value, our ability to hold the security for a period of time sufficient to allow for any anticipated recovery of fair value; (v) the extent to which fair value
may
differ from cost; and  (vi) a comparison of the income generated by the securities compared to alternative investments. We recognize an impairment charge if a decline in the fair value of our marketable securities is judged to be other-than-temporary. No such impairment charges were recorded in fiscal
2017,
2016
or
2015.
Receivables, Policy [Policy Text Block]
Accounts receivable and allowances:
  We defer recognition of revenue and the related receivable when we cannot estimate whether collectability is reasonably assured at the time products and services are delivered to our customers.  We also provide allowances for bad debt and sales returns.  
In
establishing the allowance for bad debt,
in cases where we are aware of circumstances that
may
impair a specific customer’s ability to meet its financial obligations subsequent to the original sale, we will record an allowance against amounts due, and thereby reduce the net recognized receivable to the amount we reasonably believe will be collected. For all other customers, we recognize allowances for doubtful accounts based on the length of time the receivables are past due, industry and geographic concentrations, the current business environment and our historical experience.
 
In establishing the allowance for sales returns, we make estimates of potential future returns of products for which revenue has been recognized in the current period, including analyzing historical returns, current economic trends and changes in customer demand and acceptance of our products. Our allowance for sales returns, discounts and bad debt was
$1.6
million and
$2.0
million at
January
28,
2017
and
January
30,
2016,
respectively.  If the financial condition of our customers were to deteriorate, resulting in an impairment of their ability to make payments, or future product returns increased, additional allowances
may
be required.
Inventory, Policy [Policy Text Block]
Inventory:  
Inventory consists of wafers and other purchased materials, work in process and finished goods and is stated at the lower of standard cost, which approximates actual cost on a
first
-in,
first
-out basis, or market value.  We evaluate our ending inventory for excess quantities and obsolescence on a quarterly basis.  This evaluation includes analysis of historical and estimated future unit sales by product as well as product purchase commitments that are not cancelable. We develop our demand forecasts based, in part, on discussions with our customers about their forecasted supply needs.  However, our customers generally only provide us with firm purchase commitments for the month and quarter and not our entire forecasted period.  Additionally, our sales and marketing personnel provide estimates of future sales to prospective customers based on actual and expected design wins. A provision is recorded for inventory in excess of estimated future demand.  
 
We write-off inventory that is obsolete. Obsolescence is determined from several factors, including competitiveness of product offerings, market conditions and product life cycles.  Provisions for excess and obsolete inventory are charged to cost of revenue.  At the time of the loss recognition, a new, lower-cost basis for that inventory is established and subsequent changes in facts and circumstances do not result in the restoration or increase in that newly established cost basis.  If this lower-cost inventory is subsequently sold, we will realize higher gross margins for those products.
 
Inventory write-downs inherently involve assumptions and judgments as to amount of future sales and selling prices. As a result of our inventory valuation reviews, we charged provisions for excess and obsolete inventory of approximately
$1.9
million,
$3.2
million and
$4.3
million to cost of revenue for fiscal
2017,
2016
and
2015,
respectively. We have sold through
$0.3
million,
$0.9
million and
$0.6
million of inventory that we had previously recorded as excess and obsolete in fiscal
2017,
2016
and
2015,
respectively. Although we believe that the assumptions we use in estimating inventory write-downs are reasonable, significant future changes in these assumptions could produce a significantly different result. There can be no assurances that future events and changing market conditions will not result in significant inventory write-downs.
 
Standard Product Warranty, Policy [Policy Text Block]
Warranty:
Our products typically carry a
one
-year limited warranty that products will be free from defects in materials and workmanship.  Warranty cost is estimated at the time revenue is recognized, based on historical activity and additionally for any specific known product warranty issues. Accrued warranty cost includes hardware repair and/or replacement and software support costs and is included in accrued liabilities in the consolidated balance sheets. Although we engage in extensive product quality programs and processes, our warranty obligation has been and
may
in the future be affected by product failure rates, product recalls, repair or replacement costs and additional development costs incurred in correcting any product failure. Should actual costs differ from our initial estimates, we record the difference in the period they are identified. Actual claims are charged against the warranty reserve.
Property, Plant and Equipment, Policy [Policy Text Block]
Software, equipment and leasehold improvements:  
Software, equipment and leasehold improvements are stated at cost.   Depreciation and amortization for software, equipment and leasehold improvements is computed using the straight-line method based on the useful lives of the assets
(one
to
five
years) or the remaining lease term if shorter.  Any allowance for leasehold improvements received from the landlord for improvements to our facilities is amortized using the straight-line method over the lesser of the remaining lease term or the useful life of the leasehold improvements.  Repairs and maintenance costs are expensed as incurred.
Business Combinations Policy [Policy Text Block]
Business combinations
The purchase accounting method applied to business combinations requires us to allocate the purchase price of acquired companies to the identifiable tangible and intangible assets acquired and liabilities assumed, based on their estimated fair values. Such valuations require us to make significant estimates and assumptions, especially with respect to intangible assets. The significant purchased intangible assets recorded by us include developed technology, customer relationships, purchased IP, non-compete agreements and trademarks.  Critical estimates and assumptions used in valuing these assets include but are not limited to: future expected cash flows from acquired products, customer relationships and acquired developed technologies and patents; assumptions regarding brand awareness and market position, and assumptions about the period of time the brand will continue to be used in our product portfolio; and assumptions about discount rates. The estimated fair values are based upon assumptions that we believe to be reasonable but which are inherently uncertain and unpredictable and, as a result, actual results
may
differ from estimates.
Goodwill and Intangible Assets, Policy [Policy Text Block]
Intangible and other long-lived assets:
  The amounts and useful lives assigned to intangible and other long-lived assets acquired, other than goodwill, impact the amount and timing of future amortization.  Intangible assets include those acquired through business combinations and intellectual property that we purchase for incorporation into our product designs. We begin amortizing such intellectual property at the time that we begin shipment of the associated products into which it is incorporated.  We amortize the intellectual property over the estimated useful life of the associated products, generally
two
to
three
years.
 
Goodwill is recorded as the difference, if any, between the aggregate consideration paid for an acquisition and the fair value of the net tangible and intangible assets acquired.  Other intangible assets primarily represent purchased developed technology, customer relationships, purchased IP, non-compete agreements and trademarks.  We currently amortize our intangible assets with definitive lives over periods ranging from
three
to
ten
years using a method that reflects the pattern in which the economic benefits of the intangible assets are consumed or otherwise used or, if that pattern cannot be reliably determined, using a straight-line amortization method.
Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block]
Impairment of goodwill and other long-lived assets:  
We test long-lived assets, including purchased intangible assets, for impairment whenever events or changes in circumstances, such as a change in technology, indicate that the carrying value of these assets
may
not be recoverable.  If indicators of impairment exist, we determine whether the carrying value of an asset or asset group is recoverable, based on comparisons to undiscounted expected future cash flows that the assets are expected to generate. If an asset is not recoverable, we record an impairment loss equal to the amount by which the carrying value of the asset exceeds its fair value. We primarily use the income valuation approach to determine the fair value of our long-lived assets and purchased intangible assets.
 
We evaluate goodwill on an annual basis as of the last day of our fiscal year and whenever events or changes in circumstances indicate the carrying value
may
not be recoverable.  We
first
assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If we conclude that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, we conduct a
two
-step quantitative goodwill impairment test.  The
first
step requires identifying the reporting units and comparing the fair value of each reporting unit to its net book value, including goodwill.  We have identified that we operate as
one
reporting unit and the fair value of our operating unit is determined to be equal to our market capitalization as determined through quoted market prices, adjusted for a reasonable control premium.  We estimate the control premium based on a review of acquisitions of comparable semiconductor companies that were completed during the last
four
years.  If the carrying amount of a reporting unit exceeds the reporting unit’s fair value, we perform the
second
step of the goodwill impairment test. The
second
step of the goodwill impairment test involves comparing the implied fair value of the affected reporting unit’s goodwill with the carrying value of that goodwill. The amount by which the carrying value of the goodwill exceeds its implied fair value, if any, is recognized as an impairment loss.
 
Determining the fair value of a reporting unit is judgmental in nature and involves the use of significant estimates and assumptions.  These estimates and assumptions include forecasts of revenue and operating margins used to calculate projected future cash flows, risk-adjusted discount rates, future economic and market conditions and a determination of appropriate market comparables.  We base our fair value estimates on assumptions we believe to be reasonable at that time, however, actual future results
may
differ from those estimates.  Future competitive, market and economic conditions could negatively impact key assumptions including our market capitalization, actual control premiums or the carrying value of our net assets, which could require us to realize an additional impairment.
Investment, Policy [Policy Text Block]
Long-term investments:
  Investments in private equity securities of less than
20%
owned companies are accounted for using the cost method unless we can exercise significant influence or the investee is economically dependent upon us, in which case the equity method is used.  We evaluate our long-term investments for impairment annually or whenever events or changes in circumstances indicate that the carrying value of these assets
may
not be recoverable.
Revenue Recognition, Policy [Policy Text Block]
Revenue recognition:
We derive our revenue primarily from product sales which comprised approximately
97%,
99%
and
97%
of total net revenue during fiscal
2017,
2016
and
2015,
respectively.  Our products, which we refer to as chipsets, consist of highly integrated chips and embedded software that enables real-time processing of digital video and audio content; and in the case of our IoT Devices, establishes a mesh network protocol that provides an interoperable platform for automation and monitoring solutions, all of which we refer to as embedded software. We do not deliver software as a separate product in connection with product sales.  We recognize revenue for product sales when persuasive evidence of an arrangement exists, delivery has occurred, the fee is fixed or determinable and collectability is reasonably assured. These criteria are usually met at the time of product shipment. We record reductions of revenue for estimated product returns and pricing adjustments, such as rebates, in the same period that the related revenue is recorded. The amount of these reductions is based on historical sales returns, analysis of credit memo data, specific criteria included in the agreements, and other factors known at the time. We accrue
100%
of potential returns at the time of sale when there is not sufficient historical sales data and recognize revenue when the right of return expires. We also accrue
100%
of potential rebates at the time of sale and do not apply a breakage factor. We reverse the accrual for unclaimed rebate amounts as specific rebate programs contractually end and when we believe unclaimed rebates are no longer subject to payment and will not be paid. See Note
6
for a summary of our rebate activity.
 
On occasion, we derive revenue from the license of our internally developed intellectual property (“IP”). IP licensing agreements that we enter into generally provide licensees the right to incorporate our IP components in their products with terms and conditions that vary by licensee. Our license fee arrangements generally include multiple deliverables and we are required to determine whether there is more than
one
unit of accounting. To the extent that the deliverables are separable into multiple units of accounting, we allocate the total fee on such arrangements to the individual units of accounting using management’s best estimate of selling price ("ESP"), if
third
party evidence ("TPE") or vendor specific objective evidence ("VSOE") does not exist. We defer revenue recognition for consideration that is contingent upon future performance or other contractual terms.
 
Our process for determining our ESP for deliverables without VSOE or TPE considers multiple factors that
may
vary depending upon the unique facts and circumstances related to each deliverable. The key factors that we consider in developing the ESPs include the nature and complexity of the licensed technologies, our cost to provide the deliverables, the availability of substitute technologies in the marketplace and our historical pricing practices. We then recognize revenue for each unit of accounting depending on the nature of the deliverable(s) comprising the unit of accounting in accordance with the revenue recognition criteria mentioned above. Fees under these agreements generally include (a) license fees relating to our IP, (b) engineering services, and (c) support services. Historically, each of these elements has standalone value and therefore each are treated as separate units of accounting. Any future licensing arrangements will be analyzed based on the specific facts and circumstances which
may
be different than our historical licensing arrangements.
 
For deliverables related to licenses of our technology that involve significant engineering services, we recognize revenue in accordance with the provisions of the proportional performance method or milestone method, as applicable. We determine costs associated with engineering services using actual labor dollars incurred and estimate other direct or incremental costs allocated based on the percentage of time the engineer(s) spent on the project. These costs are deferred until revenue recognition criteria have been met, at which time they are reclassified as cost of revenue. 
 
Licensing revenue deliverables are generally recognized using the milestone method. Under the milestone method, we recognize revenue that is contingent upon the achievement of a substantive milestone in its entirety in the period in which the milestone is achieved. To be considered substantive, the consideration earned by achieving the milestone should be (a) commensurate with either (i) the vendor’s performance to achieve the milestone or (ii) to the enhancement of the value of the item delivered as a result of a specific outcome resulting from the vendor’s performance to achieve the milestone (b) the consideration should relate solely to past performance, and (c) the consideration should be reasonable relative to all deliverables and payment terms in the arrangement. Other milestones that do not fall under the definition of a milestone under the milestone method are recognized under the authoritative guidance concerning revenue recognition.
 
We derive a portion of our revenues in the form of fees from members of a wholly-owned entity dedicated to the marketing, development and proliferation of the Z-Wave brand. Membership fees vary based on level and are generally billed on an annual basis with no obligation to renew. Revenue from membership dues is recognized in the month earned. Membership dues received in advance are included in deferred revenue and recognized as revenue ratably over the appropriate period, which is generally
twelve
months or less. The monthly dues are generally structured to cover the administrative costs and membership services. Membership revenue was approximately
$1
.9
million,
$1.9
million and
$0.9
million during fiscal
2017,
2016
and
2015,
respectively.
 
We defer revenue when payments are received from customers in advance of revenue recognition.  Deferred revenue at both
January
28,
2017
and
January
30,
2016
was
$0.4
million, and is included in accrued liabilities in the accompanying consolidated balance sheets.
Cost of Sales, Policy [Policy Text Block]
Cost of revenue:
Cost of revenue is comprised of the cost of our media processors and chipset solutions, which consists of the cost of purchasing finished silicon wafers manufactured by independent foundries, costs associated with our purchase of assembly, test and quality assurance services and packaging materials, as well as royalties paid to vendors for use of their technology. Also included in cost of revenue is the amortization of purchased IP, manufacturing overhead, including costs of personnel and equipment associated with manufacturing support, product warranty costs, provisions for excess and obsolete inventory, and stock-based compensation expense for personnel engaged in manufacturing support.
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Foreign currency:  
The functional currency of our foreign subsidiaries is either the U.S. dollar or the local currency of each country.  Monetary assets and liabilities denominated in foreign currencies are remeasured at exchange rates in effect at the end of each period, and non-monetary assets, such as inventory
, property, plant and equipment, and liabilities are recorded at historical rates.
Gains and losses from these remeasurements as well as other transaction gains and losses are included in interest and other income, net, in the consolidated statements of operations. Our subsidiaries that utilize foreign currency as their functional currency translate such currency into U.S. dollars using (i) the exchange rate on the balance sheet dates for assets and liabilities, and (ii) the average exchange rates prevailing during the period for revenues and expenses.  Any translation adjustments resulting from this process are shown separately as a component of accumulated other comprehensive income (loss) within shareholders’ equity.
Foreign currency transaction gains and losses resulted in net losses of approximately
$0.1
million,
$0.2
million and
$1.0
million in fiscal
2017,
2016
and
2015,
respectively.
Concentration Risk, Credit Risk, Policy [Policy Text Block]
Concentration of credit risk:  
Financial instruments which potentially subject us to concentrations of credit risk consist primarily of cash and cash equivalents, short-term and long-term marketable securities, restricted cash, long-term investments and accounts receivable.  Our cash, cash equivalents, short-term and long-term marketable securities and restricted cash are on deposit with major financial institutions, as specified in our investment policy guidelines.  Such deposits
may
be in excess of insured limits.  We believe that the financial institutions that hold our cash, cash equivalents, short-term and long-term marketable securities and restricted cash are financially sound and, accordingly, minimal credit risk exists with respect to these balances.  We have not experienced any investment losses due to institutional failure or bankruptcy.
 
Sales to our recurring and new customers are generally made on open account, a prepaid or letter of credit basis. We perform ongoing credit evaluations of our customers and generally do not require collateral for sales on credit.  We review our accounts receivable balances to determine if any receivables will potentially be uncollectible and include any amounts that are determined to be uncollectible in our allowance for doubtful accounts.
Commitments and Contingencies, Policy [Policy Text Block]
Loss Contingencies
:
In determining loss contingencies, we consider the likelihood of a loss of an asset or the incurrence of a liability as well as the ability to reasonably estimate the amount of such loss or liability. An estimated loss from a loss contingency is accrued and charged to expense when the information available indicates that it is probable that an asset has been impaired or a liability has been incurred, and when the amount of the loss can be reasonably estimated. 
Income Tax, Policy [Policy Text Block]
Income taxes:  
Income taxes are accounted for under an asset and liability approach.  Deferred income taxes reflect the net tax effects of any temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts reported for income tax purposes, and any operating losses and tax credit carry-forwards.  Deferred tax liabilities are recognized for future taxable amounts and deferred tax assets are recognized for future deductions, net of any valuation allowance, to reduce deferred tax assets to amounts that are considered more likely than not to be realized. 
 
The impact of an uncertain income tax position on the income tax return must be recognized as the largest amount that is more-likely-than-not to be sustained upon audit by the relevant taxing authority.  An uncertain income tax position will not be recognized if it has less than a
50%
likelihood of being sustained.
Compensation Related Costs, Policy [Policy Text Block]
Stock-based compensation:  
We have in effect stock incentive plans under which incentive stock options, restricted stock units, restricted stock awards and non-qualified stock options have been granted to employees and members of the Board of Directors. We also have an employee stock purchase plan for all eligible employees. We measure and recognize compensation expense for all stock-based payment awards made to employees based on the closing fair market value of the Company’s common stock on the date of grant
.  Stock option awards are measured using the Black-Scholes option pricing model.  The value of the portion of the award that is ultimately expected to vest is recognized as expense on a ratable basis over the requisite service period for time-based awards and on a graded basis for performance-based awards in our consolidated statements of operations.  We estimate forfeitures, based on historical experience, at the time of grant and revise our estimates, if necessary, in subsequent periods if actual forfeitures differ from those estimates. We recognize a benefit from stock-based compensation in the consolidated statements of shareholders’ equity if an excess tax benefit is realized. Further information regarding stock-based compensation can be found in Note
12,
“Equity incentive plans and employee benefits.”
Research and Development Expense, Policy [Policy Text Block]
Research and development costs:
Costs incurred in the research and development of our products are expensed as incurred.
Advertising Costs, Policy [Policy Text Block]
Advertising costs:
Advertising costs are expensed as incurred and are included as an element of sales and marketing expense in the accompanying consolidated statements of operations. Advertising expenses incurred were
$0.2
million,
$0.2
million and
$0.1
million in fiscal
2017,
2016
and
2015,
respectively.
Comprehensive Income, Policy [Policy Text Block]
Comprehensive income (loss):
Comprehensive income (loss) consists of net income (loss) and other comprehensive income (loss).  Other comprehensive income (loss) includes certain changes in equity that are excluded from results of operations; specifically, foreign currency translation adjustments and unrealized gains or losses on marketable securities.
New Accounting Pronouncements, Policy [Policy Text Block]
Recent accounting pronouncements:  
Recent accounting pronouncements expected to impact our operations that are not yet effective are summarized as follows:
 
In
November
2016,
the FASB issued ASU No.
2016
-
18,
Statement of Cash Flows (Topic
230):
Restricted Cash (“ASU
2016
-
18”).
The update provides guidance on the presentation of restricted cash or restricted cash equivalents in the statement of cash flows.
ASU
2016
-
18
is effective for us beginning in the
first
quarter of fiscal
2019
and early adoption is permitted.
 
In
March
2016,
the FASB
 issued ASU No.
2016
-
09,
Compensation-Stock Compensation (Topic
718):
Improvements to Employee Share-Based Payment Accounting (“ASU
2016
-
09”).
The amendment simplifies several aspects of the accounting for share-based payments, including immediate recognition of all excess tax benefits and deficiencies in the income statement, changing the threshold to qualify for equity classification up to the employees’ maximum statutory tax rates, allowing an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures as they occur, and clarifying the classification on the statement of cash flows for the excess tax benefit and employee taxes paid when an employer withholds shares for tax-withholding purposes. ASU
2016
-
09
is effective for
us beginning in the
first
quarter of fiscal
2018.
We are currently evaluating the impact that this ASU will have on our consolidated financial statements
.
 
In
February
2016,
the FASB issued ASU No.
2016
-
02,
 Leases (Topic
842)
 (“ASU
2016
-
02”),
which requires lessees to recognize all leases, including operating leases, on the balance sheet as a lease asset or lease liability, unless the lease is a short-term lease. ASU
2016
-
02
also requires additional disclosures regarding leasing arrangements. ASU
2016
-
02
is effective for us beginning in the
first
quarter of fiscal
2020
and early adoption is permitted. We are currently evaluating the impact, and expect the ASU will have a material impact on our consolidated financial statements, primarily to the consolidated balance sheets and related disclosures
.
 
In
May
2014,
the FASB issued ASU No.
2014
-
09,
Revenue from Contracts with Customers (Topic
606)
(“ASU
2014
-
09”),
which amends the existing accounting standards for revenue recognition. ASU
2014
-
09
is based on principles that govern the recognition of revenue at an amount an entity expects to be entitled when products or services are transferred to customers. ASU
2014
-
09
is effective for us beginning in the
first
quarter of fiscal
2019
and early adoption is permitted
 
Subsequently, the FASB has issued the following standards related to ASU
2014
-
09:
ASU No. 
2016
-
08,
Revenue from Contracts with Customers (Topic
606):
Principal versus Agent Considerations (“ASU
2016
-
08”);
ASU No.
2016
-
10,
Revenue from Contracts with Customers (Topic
606):
Identifying Performance Obligations and Licensing (“ASU
2016
-
10”);
ASU No.
2016
-
12,
Revenue from Contracts with Customers (Topic
606):
Narrow-Scope Improvements and Practical Expedients (“ASU
2016
-
12”)
and ASU No.
2016
-
20,
Technical Corrections and Improvements to Topic
606,
Revenue from Contracts with Customers (“ASU
2016
-
20”).
We must adopt ASU
2016
-
08,
ASU
2016
-
10,
ASU
2016
-
12
and ASU
2016
-
20
with ASU
2014
-
09
(collectively, the “new revenue standards”). We currently expect to adopt Topic
606
as of
February
4,
2018,
using the modified retrospective transition method applied to those contracts which were not completed as of that date. Upon adoption, we will recognize the cumulative effect of adopting this guidance as an adjustment to our opening balance of retained earnings. Prior periods will not be retrospectively adjusted. We expect the adoption of Topic
606
will not have a material impact to our consolidated financial statements.