Giga-tronics (GIGA) 10-K 25 Jun 21 2021 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Mar. 27, 2021	Jun. 22, 2021	Sep. 26, 2020
Document Information [Line Items]
Entity Registrant Name	GIGA TRONICS INC
Entity Central Index Key	0000719274
Trading Symbol	giga
Current Fiscal Year End Date	--03-27
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding (in shares)		2,735,010
Entity Public Float			$ 9,133,271
Entity Shell Company	false
Document Type	10-K
Document Period End Date	Mar. 27, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
Title of 12(b) Security	Common Stock, No par value; Preferred Share Purchase Rights

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Mar. 27, 2021	Mar. 28, 2020
Current assets:
Cash	$ 736,000	$ 657,000
Trade accounts receivable, net of allowance of $3 and $8, respectively	801,000	932,000
Inventories, net	3,601,000	3,261,000
Prepaid expenses	100,000	107,000
Unbilled receivable	1,120,000	2,102,000
Total current assets	6,358,000	7,059,000
Property and equipment, net	455,000	508,000
Right-of-use asset	865,000	1,183,000
Other long-term assets	169,000	176,000
Total assets	7,847,000	8,926,000
Liabilities and shareholders’ equity
Accounts payable	1,044,000	803,000
Loans payable, net of discounts and issuance costs	683,000	1,320,000
Accrued payroll and benefits	446,000	300,000
Deferred revenue	7,000	159,000
Lease obligations	445,000	426,000
Other current liabilities	279,000	364,000
Total current liabilities	2,904,000	3,372,000
Other non-current liabilities	6,000	119,000
Long term lease obligations	690,000	1,135,000
Total liabilities	3,600,000	4,626,000
Commitments and Contingencies
Shareholders’ equity:
Common stock; no par value; Authorized – 13,333,333 shares; 2,635,856 shares issued and outstanding at March 27, 2021 and March 28, 2020	32,306,000	31,952,000
Accumulated deficit	(30,981,000)	(30,574,000)
Total shareholders’ equity	4,247,000	4,300,000
Total liabilities and shareholders’ equity	7,847,000	8,926,000
Series A Preferred Stock [Member]
Shareholders’ equity:
Preferred stock
Series B, C, and D Preferred Stock [Member]
Shareholders’ equity:
Preferred stock	2,745,000	2,745,000
Series E Preferred Stock [Member]
Shareholders’ equity:
Preferred stock	$ 177,000	$ 177,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands	Mar. 27, 2021	Mar. 28, 2020
Trade accounts receivable, allowance	$ 3	$ 8
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	13,333,333	13,333,333
Common stock, issued (in shares)	2,635,856	2,635,856
Common stock, outstanding (in shares)	2,635,856	2,635,856
Series A Preferred Stock [Member]
Preferred stock, authorized (in shares)	250,000	250,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Series B, C, and D Preferred Stock [Member]
Preferred stock, authorized (in shares)	19,500	19,500
Preferred stock, issued (in shares)	17,782	17,782
Preferred stock, outstanding (in shares)	17,782	17,782
Preferred stock, liquidation preference	$ 3,367	$ 3,367
Series E Preferred Stock [Member]
Preferred stock, authorized (in shares)	100,000	100,000
Preferred stock, issued (in shares)	9,200	9,200
Preferred stock, outstanding (in shares)	9,200	9,200
Preferred stock, liquidation preference	$ 345	$ 345

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Revenue	$ 13,052	$ 11,768
Cost of revenue	8,111	7,180
Gross profit	4,941	4,588
Operating expenses:
Engineering	2,153	1,552
Selling, general and administrative	3,873	3,469
Total operating expenses	6,026	5,021
Operating loss	(1,085)	(433)
Gain on extinguishment of PPP Loan	791
Interest expense, net	(97)	(252)
Loss before income taxes	(391)	(685)
Provision for income taxes	2	2
Net loss	(393)	(687)
Deemed Dividend on Series E shares	(14)	(94)
Cumulative dividends on Series E		(1,245)
Net loss attributable to common shareholders	$ (407)	$ (2,026)
Loss per common share - basic (in dollars per share)	$ (0.15)	$ (1.64)
Weighted average shares used in per share calculation:
Basic and diluted (in shares)	2,636	1,232
Product [Member]
Revenue	$ 3,670	$ 3,521
Service [Member]
Revenue	$ 9,382	$ 8,247

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Series B Preferred Stock [Member]Preferred Stock Including Additional Paid in Capital [Member]	Series B Preferred Stock [Member]Common Stock Including Additional Paid in Capital [Member]	Series B Preferred Stock [Member]Retained Earnings [Member]	Series B Preferred Stock [Member]	Series E Preferred Stock [Member]Preferred Stock Including Additional Paid in Capital [Member]	Series E Preferred Stock [Member]Common Stock Including Additional Paid in Capital [Member]	Series E Preferred Stock [Member]Retained Earnings [Member]	Series E Preferred Stock [Member]	Preferred Stock Including Additional Paid in Capital [Member]	Common Stock Including Additional Paid in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Mar. 30, 2019									116,934	757,367
Balance at Mar. 30, 2019									$ 4,806	$ 25,557	$ (28,548)	$ 1,815
Net loss											(687)	(687)
Restricted stock granted (in shares)										10,000
Restricted stock granted
Restricted stock forfeited (in shares)										(1,332)
Restricted stock forfeited
Stock based compensation										$ 301		301
Fractional shares due to reverse stock split (in shares)										(81)
Shares issued related to loan agreement (in shares)										167
Shares issued related to loan agreement
Common stock issuance, net of offering costs (in shares)										846,001
Common stock issuance, net of offering costs										$ 2,564		2,564
Warrants exercised (in shares)										84,095
Warrants exercised										$ 212		212
Series E dividends (in shares)										44,627
Series E dividends										$ 189		95
Series E dividends, Preferred											(94)
Series E preferred stock issuance									$ (2)	$ 2
Preferred stock converted to common (in shares)	(752)	5,012			(89,200)	890,000
Preferred stock converted to common	$ (166)	$ 166			$ (1,716)	$ 2,961	$ (1,245)
Series E dividend (in shares)										44,627
Balance (in shares) at Mar. 28, 2020									26,982	2,635,856
Balance at Mar. 28, 2020									$ 2,922	$ 31,952	(30,574)	4,300
Net loss											(393)	(393)
Stock based compensation										$ 354		354
Series E dividends (in shares)
Series E dividends, Preferred											(14)	(14)
Series E dividend (in shares)
Balance (in shares) at Mar. 27, 2021									26,982	2,635,856
Balance at Mar. 27, 2021									$ 2,922	$ 32,306	$ (30,981)	$ 4,247

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Cash flows from operating activities:
Net loss	$ (393,000)	$ (687,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	253,000	315,000
Stock based compensation	354,000	301,000
Amortization of debt discount		20,000
Gain on extinguishment of debt	(786,000)
Interest forgiven	(5,000)
Changes in operating assets and liabilities:
Trade accounts receivable	131,000	(364,000)
Inventories, net	(445,000)	(658,000)
Prepaid expenses	7,000	(49,000)
Unbilled receivable	982,000	(806,000)
Right of use asset	318,000	178,000
Other long-term assets	7,000
Accounts payable	241,000	56,000
Accrued payroll and benefits	146,000	(176,000)
Deferred revenue	(152,000)	159,000
Accrued interest	(91,000)	(257,000)
Change in deferred rent		(3,000)
Other current and non-current liabilities	(208,000)	(388,000)
Net cash provided by (used in) operating activities	359,000	(2,359,000)
Cash flows from investing activities:
Purchases of property and equipment	(94,000)	(123,000)
Net cash used in investing activities	(94,000)	(123,000)
Cash flows from financing activities:
Payments on leases	(426,000)	(291,000)
Repayments of borrowings	(2,680,000)	(1,676,000)
Proceeds from loan payable, net of issuance costs	2,920,000	1,453,000
Proceeds from issuance of stock, net of issuance costs		2,564,000
Proceeds from exercise of warrants		211,000
Payments of dividends
Net cash provided by (used in) financing activities	(186,000)	2,261,000
Increase (decrease) in cash	79,000	(221,000)
Beginning cash	657,000	878,000
Ending cash	736,000	657,000
Supplementary disclosure of cash flow information:
Cash paid for income taxes	2,000	57,000
Cash paid for interest	98,000	402,000
Supplementary disclosure of noncash investing and financing activities:
Cumulative effect of adoption of ASC 842 on right of use assets		1,361,000
Cumulative effect of adoption of ASC 842 on deferred rent		429,000
Cumulative effect of adoption of ASC 842 on lease liability		1,790,000
Issuance of dividends in kind		$ (190,000)

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Significant Accounting Policies [Text Block]	Note 1. The accompanying consolidated financial statements include the accounts of Giga-tronics Incorporated (“Giga-tronics”) and its wholly owned subsidiary, Microsource, Inc., collectively the “Company”. The Company's corporate office and manufacturing facilities are located in Dublin, California. On December 12, 2019, one fifteen Principles of Consolidation The consolidated financial statements include the accounts of Giga-tronics and its wholly owned subsidiary. All significant intercompany balances and transactions have been eliminated in consolidation. Use of Estimates The preparation of consolidated financial statements is in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Fiscal Year The Company's financial reporting year consists of either a 52 53 March. 2021 March 27, 2021, 52 2020 March 28, 2020, 52 Reclassification Certain balances included on the Consolidated Balance Sheets and in the Consolidated Statements of Cash Flows for prior periods have been reclassified to conform to the current period presentation. Leases In February 2016, 2016 02 Leases 842” not 12 12 842. 842 840 842 March 31, 2019. July 2018, No. 2018 11, 842 842 one 2016 02 March 31, 2019, $1.4 $1.8 no 2016 02 Revenue Recognition Beginning April 1, 2018, 2014 09 2015 2017 ASC 606 not In determining the appropriate amount of revenue to be recognized as it fulfills its obligations under its agreements, the Company performs the following steps: (i) identify the contract with the customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price and (v) recognize revenue when or as we satisfy each performance obligation. Contract Identification The Company generates revenue through the design, manufacture, and sale of products used in the defense industry to major prime defense contractors, the U.S. armed services and research institutes. There is generally one not For the sale of standard or minimally customized products, the performance obligation is the series of finished products which are recognized at the points in time the units are transferred to the control of the customer, typically upon shipment. This type of revenue arrangement is typical for our commercial contracts within the Giga-tronics segment for its Advanced Signal Generation and Analysis system products used for testing RADAR/EW equipment. Performance Obligations A performance obligation is a promise in a contract to transfer a distinct good or service to the customer and is the unit of account in ASC Topic 606. ● Design and manufacturing services ● Product supply ● Engineering services The majority of the Company's contracts have a single performance obligation as the promise to transfer the individual goods or services is not not Transaction Price The Company has both fixed and variable consideration. Under the Company's highly engineered design and manufacturing arrangements, advance payments and unit prices are considered fixed, as product is not may not Allocation of Consideration As part of the accounting for arrangements that contain multiple performance obligations, the Company must develop assumptions that require judgment to determine the stand-alone selling price of each performance obligation identified in the contract. When a contract contains more than one Timing of Revenue Recognition Significant management judgment is required to determine the level of effort required under an arrangement and the period over which the Company expects to complete its performance obligations under the arrangement. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. The Company generally uses the cost-to-cost measure of progress as this measure best depicts the transfer of control to the customer which occurs as we incur costs on our contracts. Under the cost-to-cost method, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenue is recognized for design and manufacturing services and for engineering services over time proportionate to the costs that the Company has incurred to perform the services using the cost-to-cost method and for products at a point in time. Changes in Estimates The effect of a contract modification on the transaction price and the measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis. For contracts using the cost-to-cost method, management reviews the progress and execution of the performance obligations. This process requires management judgment relative to estimating contract revenue and cost and making assumptions for delivery schedule. This process requires management's judgment to make reasonably dependable cost estimates. Since certain contracts extend over a longer period of time, the impact of revisions in cost and revenue estimates during the progress of work may Balance Sheet Presentation The timing of revenue recognition, billings and cash collections results in billed accounts receivable, unbilled receivables (contract assets), and deferred revenue (contract liabilities) on the Consolidated Balance Sheets. Under the typical payment terms of over time contracts, the customer pays either performance-based payments or progress payments. Amounts billed and due from customers are classified as receivables on the Consolidated Balance Sheets. Interim payments may may not Remaining performance obligations represent the transaction price of firm orders for which work has not Conversion of Convertible Preferred Stock ASC 260 10 S99, Earnings Per Share ( EPS ) 470 20 40 13 40 17, Debt with conversion and other options 470 20 40 13 40 17 1 2 3 •Reduction of the original conversion price (thereby resulting in the issuance of additional shares of stock) •Issuance of warrants or other securities not •Payment of cash or other consideration (sometimes called a convertible stock sweetener) to those shareholders who convert during the specified time period. The additional consideration is usually offered to induce prompt conversion of the stock to another class of equity. ASC 470 20 40 14 not If a conversion of preferred stock is an inducement offer pursuant to ASC 470, 260 10 S99 2. 17. Practical Expedients Elected The Company has elected to apply the package of practical expedients under ASU 2016 02 not not not Accrued Warranty The Company's warranty policy generally provides one three Inventories Inventories are stated at the lower of cost or fair value using full absorption and standard costing. Cost is determined on a first first not Research and Development Research and development expenditures, which include the cost of materials consumed in research and development activities, salaries, wages and other costs of personnel engaged in research and development, costs of services performed by others for research and development on the Company's behalf and indirect costs are expensed as operating expenses when incurred. Research and development costs totaled approximately $2.2 $1.6 March 27, 2021 March 28, 2020, Property and Equipment Property and equipment are stated at cost. Depreciation is calculated using the straight-line method over the estimated useful lives of the respective assets, which range from three ten The Company reviews its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not March 27, 2021 March 28, 2020, no Warrants to Purchase Common Stock Warrants are accounted for in accordance with the applicable accounting guidance provided in ASC 815 Derivatives and Hedging Income Taxes Income taxes are accounted for using the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Future tax benefits are subject to a valuation allowance when management is unable to conclude that its deferred tax assets will more likely than not The Company considers all tax positions recognized in its financial statements for the likelihood of realization. When tax returns are filed, it is highly certain that some positions taken would be sustained upon examination by the taxing authorities, while others are subject to uncertainty about the merits of the positions taken or the amounts of the positions that would be ultimately sustained. The benefit of a tax position is recognized in the financial statements in the period during which, based on all available evidence, management believes it is more likely than not not 50 Stock-based Compensation The Company records stock-based compensation expense for the fair value of all stock options and restricted stock that are ultimately expected to vest as the requisite service is rendered. The cash flows resulting from the tax benefits resulting from tax deductions in excess of the compensation cost recognized for those options (excess tax benefits) are classified as cash flows from financing in the statements of cash flows. These excess tax benefits were not March 27, 2021 March 28, 2020. In calculating compensation related to stock option grants, the fair value of each stock option is estimated on the date of grant using the Black-Scholes-Merton option-pricing model. The computation of expected volatility used in the Black-Scholes- Merton option-pricing model is based on the historical volatility of Giga-tronics' share price. The expected term is estimated based on a review of historical employee exercise behavior with respect to option grants. Forfeitures are accounted for as they occur. We do not 2021, 107 not not no The fair value of restricted stock awards is based on the fair value of the underlying shares at the date of the grant. The Company records forfeitures as they occur. Income or Loss Per Common Share Basic income or loss per common share is computed using the weighted average number of common shares outstanding during the period. Diluted EPS incorporate the incremental shares issuable upon the assumed exercise of stock options and warrants using the treasury stock method. Anti-dilutive options are not two Comprehensive Income or Loss There are no Financial Instruments and Concentration of Credit Risk Financial instruments that potentially subject the Company to credit risk primarily consist of cash and trade accounts receivable. The Company's cash is deposited with federally insured financial institutions. Concentration of credit risk in trade accounts receivable results primarily from sales to major customers. The Company individually evaluates the creditworthiness of its customers and generally does not March 27, 2021, two 95% March 28, 2020, three 96% Fair Value of Financial Instruments and Fair Value Measurements The Company's financial instruments consist principally of cash, line of credit, term debt, and warrant derivative liability. The fair value of a financial instrument is the amount at which the instrument could be exchanged in an orderly transaction between market participants to sell the asset or transfer the liability. The Company uses fair value measurements based on quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity can access as of the measurement date (Level 1 1 not 2 3

Note 2 - Cash

Note 2 - Cash	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Cash and Cash Equivalents Disclosure [Text Block]	Note 2. Cash of $736,000 $657,000 March 27, 2021 March 28, 2020, March 27, 2021 March 28, 2020, $486,000 $407,000

Note 3 - Inventories, Net

Note 3 - Inventories, Net	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Inventory Disclosure [Text Block]	Note 3. Inventories, net is comprised of the following: Inventories, net (Dollars in thousands) Category March 27, 2021 March 28, 2020 Raw materials $ 946 $ 890 Work-in-progress 2,418 1,828 Finished goods 129 263 Demonstration inventory 108 280 Total $ 3,601 $ 3,261

Note 4 - Property, Plant and Eq

Note 4 - Property, Plant and Equipment, Net	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	Note 4. Property, plant and equipment, net is comprised of the following: Property, plant and equipment, net (Dollars in thousands) Category March 27, 2021 March 28, 2020 Leasehold improvements $ 648 $ 642 Machinery and equipment 4,631 4,566 Computer and software 705 681 Furniture and office equipment 107 107 Property, plant and equipment 6,091 5,996 Less: accumulated depreciation and amortization (5,636 ) (5,488 ) Property, plant and equipment, net $ 455 $ 508

Note 5 - Financed Receivables

Note 5 - Financed Receivables	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Debt Disclosure [Text Block]	Note 5. On March 11, 2019, May 6, 2015 ( Under the Restated Financing Agreement, Western Alliance Bank may 85% $2.5 $500,000 Under the Restated Financing Agreement, interest accrues on outstanding amounts at an annual rate equal to the greater of prime or 4.5% one $14,700, two no may The Restated Financing Agreement contains customary events of default, including, among others: non-payment of principal, interest or other amounts when due; providing false or misleading representations and information; Western Alliance Bank failing to have an enforceable first 500 may As of March 27, 2021 March 28, 2020, $683,382 $527,468,

Note 6 - Term Loan

Note 6 - Term Loan	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Long-term Debt [Text Block]	Note 6. On April 27, 2017, $1.5 April 28, 2017 ( April 27, 2019, 16% 9.5% 6.5% $100,000 $76,000 April 27, 2017, $24,000 $1,000 first In December 2018, 2017 April 27, 2019 November 1, 2019, May 1, 2019 $75,000 May 1, 2019 $500,000 As of March 30, 2019, March 11, 2019, 2017 March 1, 2020. On January 31, 2020, 2017 $16,500; March 1, 2020 March 1, 2021; $75,000 February 1, 2020 $57,700 first 16%, 9.5% 6.5% On March 1, 2021, As of March 27, 2021 March 28, 2020, $0 $792,300,

Note 7 - Paycheck Protection Pr

Note 7 - Paycheck Protection Program Loan Under the Cares Act	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Paycheck Protection Program CARES Act [Text Block]	Note 7. On April 23, 2020, $786,200 470, Debt April 23, 2022, 1.0% November 1, 2020. On November 19, 2020,

Note 8 - Fair Value

Note 8 - Fair Value	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 8. Pursuant to the accounting guidance for fair value measurement and its subsequent updates, fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the “exit price”) in an orderly transaction between market participants at the measurement date. The accounting guidance establishes a hierarchy for inputs used in measuring fair value that minimizes the use of unobservable inputs by requiring the use of observable market data when available. Observable inputs are inputs, that market participants would use in pricing the asset or liability based on active market data. Unobservable inputs are inputs that reflect the assumptions market participants would use in pricing the asset or liability based on the best information available in the circumstances. The fair value hierarchy is broken down into the three ● Level 1: 1 ● Level 2: 2 ● Level 3: no The carrying amounts of the Company's cash and line of credit approximate their fair values at each balance sheet date due to the short-term maturity of these financial instruments, and generally result in inputs categorized as Level 1 2

Note 9 - Sales of Common Stock

Note 9 - Sales of Common Stock	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	Note 9. On March 11, 2020, two 146,668 $3.75 $550,004. $510,000.

Note 10 - Shareholder Rights Pl

Note 10 - Shareholder Rights Plan	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Shareholder Rights Plan [Text Block]	Note 10. On October 12, 2020, one October 22, 2020. The Rights Plan provides that in the event any person becomes the beneficial owner of 15% 15% tenth one $15.00 25% 50% 15% The Rights expire on October 22, 2025 ( $0.001 first

Note 11 - Significant Customers

Note 11 - Significant Customers and Industry Segment Information	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	Note 11. The Company has two ten two The Giga-tronics Division designs, manufactures and markets a family of functional test products for the RADAR/EW segment of the defense electronics market. Our RADAR/EW test products are used to evaluate and improve the performance of RADAR/EW systems. The accounting policies for the segments are the same as those described in the “Summary of Significant Accounting Policies”. The Company evaluates the performance of its segments and allocates resources to them based on earnings before income taxes. Segment net revenue include revenue to external customers. Inter-segment activities are eliminated in consolidation. Assets include accounts receivable, inventories, equipment, cash, deferred income taxes, prepaid expenses and other long- term assets. The Company accounts for inter-segment revenue and transfers at terms that allow a reasonable profit to the seller. During the periods reported there were no The Company's reportable operating segments are strategic business units that offer different products and services. They are managed separately because each business utilizes different technology and requires different accounting systems. The Company's chief operating decision maker is considered to be the Company's Chief Executive Officer (“CEO”). The CEO reviews financial information presented on a consolidated basis accompanied by disaggregated information about revenues and pre-tax income or loss by operating segment. The tables below present information for fiscal years ended March 27, 2021 March 28, 2020. March 27, 2021 (Dollars in thousands) Giga-tronics Division Microsource Total Revenue $ 3,670 $ 9,382 $ 13,052 Interest expense, net $ (97 ) $ — $ (97 ) Depreciation and amortization $ 253 $ — $ 253 Income (loss) before income taxes $ (642 ) $ 251 $ (391 ) Assets $ 5,281 $ 2,566 $ 7,847 March 28, 2020 (Dollars in thousands) Giga-tronics Division Microsource Total Revenue $ 3,521 $ 8,247 $ 11,768 Interest expense, net $ (252 ) $ — $ (252 ) Depreciation and amortization $ 315 $ — $ 315 Income (loss) before income taxes $ (802 ) $ 117 $ (685 ) Assets $ 6,011 $ 2,915 $ 8,926 The Company's Giga-tronics Division and Microsource segment sell to agencies of the U.S. government and U.S. defense- related customers. In fiscal 2021 2020, 99% 85% 2021, two 66% third 14% 2021 During fiscal 2020, two 64% third 18% 2020 Export revenue accounted for less than 1% 2021 2020.

Note 12 - Loss Per Common Share

Note 12 - Loss Per Common Share	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Earnings Per Share [Text Block]	Note 12. The number of shares issuable upon the exercise of stock options and warrants, the vesting of restricted stock and the conversion of convertible preferred stock set forth below are not Fiscal Years Ended Amount (In Thousands) March 27, 2021 March 28, 2020 Stock options 375 241 Restricted stock awards — 20 Convertible preferred stock 180 180 Warrants 46 157 Total 601 598

Note 13 - Income Taxes

Note 13 - Income Taxes	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 13. Following are the components of the provision for income taxes: Provision for Income Taxes (Dollars in thousands) Fiscal Years ended March 27, 2021 March 28, 2020 Current Federal $ — $ — State 2 2 2 2 Deferred Federal — — State — — Total — — Provision for Income taxes $ 2 $ 2 The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities are as follows: (Dollars in thousands) As of March 27, 2021 March 28, 2020 Net operating loss carryforwards $ 2,373 11,568 Income tax credits 106 $ 365 Inventory reserves and additional costs capitalized 850 865 Fixed asset depreciation (30 ) 23 Accrued expenses 100 100 ASC 842 right of use asset 156 — ASC 842 lease liability (105 ) — Allowance for doubtful accounts 1 2 Non-qualified stock options — 91 Unrealized warrant gain — (33 ) State tax benefit (8 ) (8 ) Total deferred tax asset 3,443 12,973 Valuation allowance (3,443 ) (12,973 ) $ — $ — The following summarizes the difference between the income tax expense and the amount computed by applying the statutory federal income tax rates of 21% Fiscal Years ended (In thousands except percentages) March 27, 2021 March 28, 2020 Statutory federal income tax (benefit) $ (85 ) 21 % $ (164 ) 21 % Valuation allowance (9,530 ) 2,345 % 154 (20 )% State income tax, net of federal benefit (30 ) 7 % (54 ) 7 % Section 382-383 limitation 9,697 (2,386 )% - 0 % Non tax-deductible expenses (25 ) 6 % 81 (10 )% Tax credits generated (18 ) 4 % (18 ) 2 % Other (7 ) 2 % 3 (1 )% Effective income tax $ 2 (1 )% $ 2 (1 )% The decrease in valuation allowance from March 28, 2020 March 27, 2021 $9,530,000. As of March 27, 2021, $9,716,000 $4,721,000 382 $38,345,000 $19,612,000 382 2020 382 2022 2038 2029 2040, $1,765,000 2020 2021 may 382. The federal income tax credits begin to expire from 2032 2040 2020 383 383 $394,500 not The Company has recorded a valuation allowance to reflect the estimated amount of deferred tax assets, which may not As of March 27, 2021, $52,000 not The Company files U.S Federal, California and New Hampshire state tax returns. The Company is generally no 2018 2017 A reconciliation of the beginning and ending amount of the liability for uncertain tax positions, excluding potential interest and penalties, is as follows: Fiscal Years ended March 27, 2021 March 28, 2020 Balance as of beginning of year $ 132,000 $ 123,000 Increase (decrease) based on current year tax positions (80,000 ) 9,000 Balance as of end of year $ 52,000 $ 132,000 The total amount of interest and penalties related to unrecognized tax benefits at March 27, 2021, not not not twelve 12

Note 14 - Stock Based Compensat

Note 14 - Stock Based Compensation and Employee Benefits Plans	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	Note 14. The Company maintains a 2018 416,667 2018 no 2005 2005 During the fourth 2021, 138,000 first four five may not 10 may March 27, 2021 March 28, 2020, no March 27, 2021, 144,443 2018 Stock Options The weighted average fair value of stock options granted during the fiscal years ended March 27, 2021 March 28, 2020 $3.48 $3.75, Fiscal Years ended Category March 27, 2021 March 28, 2020 Dividend yield — — Expected volatility 106 % 105 % Risk-free interest rate 0.39 % 2.21 % Expected term (years) 5.50 8.35 A summary of stock options activity for the fiscal years ended March 27, 2021 March 28, 2020 Description (Dollars in thousands except share prices) Shares Weighted Average Price per share Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding at March 30, 2019 182,366 $ 6.15 8.40 $ — Granted 73,880 4.98 9.20 — Forfeited / Expired (15,488 ) 5.13 — — Outstanding at March 28, 2020 240,758 $ 5.86 7.90 $ — Granted 148,000 3.53 9.30 — Forfeited / Expired (13,950 ) 4.15 — — Outstanding at March 27, 2021 374,808 $ 5.00 7.90 $ 99,310 Exercisable at March 27, 2021 153,395 $ 6.42 6.30 $ 2,823 Expected to vest in the future 178,682 $ 3.96 9.10 $ 83,097 As of March 27, 2021, $488,000 2018 2018 3.3 76,153 48,956 March 27, 2021 March 28, 2020, March 27, 2021 March 28, 2020 $366,878 $206,255, no 2021 2020. March 27, 2021 March 28, 2020 $314,300 $213,000, Restricted Stock The restricted stock awards are considered fixed awards as the number of shares and fair value at the grant date are amortized over the requisite service period net of estimated forfeitures. As of March 27, 2021, no 2021 2020 $39,700 $88,000, A summary of the changes in non-vested restricted stock awards outstanding for the fiscal years ended March 27, 2021 March 28, 2020 Restricted Stock Awards Shares Weighted Average Grant Date Fair Value Non-vested at March 31, 2019 22,343 $ 8.40 Granted 10,000 3.97 Vested (21,009 ) 8.25 Forfeited or cancelled (1,334 ) 12.00 Non-vested at March 28, 2020 10,000 3.97 Vested (10,000 ) 3.97 Non-vested at March 27, 2021 — $ — 401 The Company has established a 401 may 100% four 401 2021 2020 $17,000 $22,000,

Note 15 - Commitments and Conti

Note 15 - Commitments and Contingencies	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	Note 15. Operating leases On January 5, 2017, seventy-seven 23,873 April 1, 2017. In December 2018, 1,200 February 1, 2019, January 31, 2022. March 1, 2020, 2,400 February 28, 2023. Per the terms of the Company's lease agreements, the Company does not not not Lease costs For the fiscal year ended: Lease Costs (Dollars in thousands) Fiscal Years ended Classification March 27, 2021 March 28, 2020 Operating lease costs Operating expenses $ 402 $ 518 Finance lease Amortization of lease assets Depreciation and amortization 8 34 Interest on lease liability Interest expense 1 5 Total lease costs $ 411 $ 557 Other information (Dollars in thousands): For the fiscal year ended March 27, 2021 Operating leases Finance leases Operating cash used for leases $ 572 $ — Financing cash used for leases $ — $ 46 Weighted-average remaining lease term 2.42 0.46 Weighted average discount rate 6.50 % 12.00 % Future lease payments as of March 27, 2021, Future Lease Payments (Dollars in thousands) Operating leases Finance leases Total 2022 $ 503 $ 20 $ 523 2023 515 — 515 2024 209 — 209 Total future minimum lease payments 1,227 20 1,247 Less: imputed interest (74 ) (1 ) (75 ) Present value of lease liabilities $ 1,153 $ 19 $ 1,172

Note 16 - Warranty Obligations

Note 16 - Warranty Obligations	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Product Warranty Disclosure [Text Block]	Note 16. The Company records a liability in cost of sales for estimated warranty obligations at the date products are sold. Adjustments are made as new information becomes available. The following provides a reconciliation of changes in the Company's warranty reserve. The Company provides no Warranty Obligations (In thousands) Fiscal Years ended March 27, 2021 March 28, 2020 Balance at beginning of period $ 34 $ 104 Provision, net 17 (58 ) Warranty costs incurred — (12 ) Balance at end of period $ 51 $ 34

Note 17 - Preferred Stock and W

Note 17 - Preferred Stock and Warrants	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Preferred Stock [Text Block]	Note 17. Series E Senior Convertible Voting Perpetual Preferred Stock Holders of Series E Shares are entitled to receive, when, and if declared by the Company's Board of Directors, cumulative preferential dividends, payable semiannual in cash at a rate per annum equal to 6.0% $25.00 10 During the 2019 56,200 $25.00 $1,405,000. 2019 $1.2 $212,000. 5% $56,875 5% 6.67 $3.75 The Company completed a private exchange offer on November 7, 2019, 896,636 88,600 3 9 1933, may The table below presents information as of March 27, 2021 March 28, 2020: Preferred Stock Designated Shares Shares Liquidation Shares Issued Outstanding Preference Series B 10,000 9,997 9,245 $ 2,136 Series C 3,500 3,425 3,425 500 Series D 6,000 5,112 5,112 731 Series E 100,000 100,000 9,200 345 Total 119,500 118,534 26,982 $ 3,712

Note 18 - COVID-19 (Coronavirus

Note 18 - COVID-19 (Coronavirus)	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Unusual or Infrequent Items, or Both, Disclosure [Text Block]	Note 18. - 19 On January 30, 2020, March 2020 March 2020, 19 March 2020, COVID- 19

Note 19 - Subsequent Events

Note 19 - Subsequent Events	12 Months Ended
	Mar. 27, 2021
Notes to Financial Statements
Subsequent Events [Text Block]	Note 19. On April 27, 2021, 461,538 $3.25 $1.5 one no may not 9.99% On June 4, 2021, 45,153 $3.25 $150,000. 35,000 3,500 5,700

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Mar. 27, 2021
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of Consolidation The consolidated financial statements include the accounts of Giga-tronics and its wholly owned subsidiary. All significant intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates The preparation of consolidated financial statements is in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Fiscal Period, Policy [Policy Text Block]	Fiscal Year The Company's financial reporting year consists of either a 52 53 March. 2021 March 27, 2021, 52 2020 March 28, 2020, 52
Reclassification, Comparability Adjustment [Policy Text Block]	Reclassification Certain balances included on the Consolidated Balance Sheets and in the Consolidated Statements of Cash Flows for prior periods have been reclassified to conform to the current period presentation.
Lessee, Leases [Policy Text Block]	Leases In February 2016, 2016 02 Leases 842” not 12 12 842. 842 840 842 March 31, 2019. July 2018, No. 2018 11, 842 842 one 2016 02 March 31, 2019, $1.4 $1.8 no 2016 02
Revenue from Contract with Customer [Policy Text Block]	Revenue Recognition Beginning April 1, 2018, 2014 09 2015 2017 ASC 606 not In determining the appropriate amount of revenue to be recognized as it fulfills its obligations under its agreements, the Company performs the following steps: (i) identify the contract with the customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price and (v) recognize revenue when or as we satisfy each performance obligation. Contract Identification The Company generates revenue through the design, manufacture, and sale of products used in the defense industry to major prime defense contractors, the U.S. armed services and research institutes. There is generally one not For the sale of standard or minimally customized products, the performance obligation is the series of finished products which are recognized at the points in time the units are transferred to the control of the customer, typically upon shipment. This type of revenue arrangement is typical for our commercial contracts within the Giga-tronics segment for its Advanced Signal Generation and Analysis system products used for testing RADAR/EW equipment. Performance Obligations A performance obligation is a promise in a contract to transfer a distinct good or service to the customer and is the unit of account in ASC Topic 606. ● Design and manufacturing services ● Product supply ● Engineering services The majority of the Company's contracts have a single performance obligation as the promise to transfer the individual goods or services is not not Transaction Price The Company has both fixed and variable consideration. Under the Company's highly engineered design and manufacturing arrangements, advance payments and unit prices are considered fixed, as product is not may not Allocation of Consideration As part of the accounting for arrangements that contain multiple performance obligations, the Company must develop assumptions that require judgment to determine the stand-alone selling price of each performance obligation identified in the contract. When a contract contains more than one Timing of Revenue Recognition Significant management judgment is required to determine the level of effort required under an arrangement and the period over which the Company expects to complete its performance obligations under the arrangement. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. The Company generally uses the cost-to-cost measure of progress as this measure best depicts the transfer of control to the customer which occurs as we incur costs on our contracts. Under the cost-to-cost method, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenue is recognized for design and manufacturing services and for engineering services over time proportionate to the costs that the Company has incurred to perform the services using the cost-to-cost method and for products at a point in time. Changes in Estimates The effect of a contract modification on the transaction price and the measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis. For contracts using the cost-to-cost method, management reviews the progress and execution of the performance obligations. This process requires management judgment relative to estimating contract revenue and cost and making assumptions for delivery schedule. This process requires management's judgment to make reasonably dependable cost estimates. Since certain contracts extend over a longer period of time, the impact of revisions in cost and revenue estimates during the progress of work may Balance Sheet Presentation The timing of revenue recognition, billings and cash collections results in billed accounts receivable, unbilled receivables (contract assets), and deferred revenue (contract liabilities) on the Consolidated Balance Sheets. Under the typical payment terms of over time contracts, the customer pays either performance-based payments or progress payments. Amounts billed and due from customers are classified as receivables on the Consolidated Balance Sheets. Interim payments may may not Remaining performance obligations represent the transaction price of firm orders for which work has not
Conversion of Convertible Preferred Stock [Policy Text Block]	Conversion of Convertible Preferred Stock ASC 260 10 S99, Earnings Per Share ( EPS ) 470 20 40 13 40 17, Debt with conversion and other options 470 20 40 13 40 17 1 2 3 •Reduction of the original conversion price (thereby resulting in the issuance of additional shares of stock) •Issuance of warrants or other securities not •Payment of cash or other consideration (sometimes called a convertible stock sweetener) to those shareholders who convert during the specified time period. The additional consideration is usually offered to induce prompt conversion of the stock to another class of equity. ASC 470 20 40 14 not If a conversion of preferred stock is an inducement offer pursuant to ASC 470, 260 10 S99 2. 17.
New Accounting Pronouncements, Policy [Policy Text Block]	Practical Expedients Elected The Company has elected to apply the package of practical expedients under ASU 2016 02 not not not
Standard Product Warranty, Policy [Policy Text Block]	Accrued Warranty The Company's warranty policy generally provides one three
Inventory, Policy [Policy Text Block]	Inventories Inventories are stated at the lower of cost or fair value using full absorption and standard costing. Cost is determined on a first first not
Research and Development Expense, Policy [Policy Text Block]	Research and Development Research and development expenditures, which include the cost of materials consumed in research and development activities, salaries, wages and other costs of personnel engaged in research and development, costs of services performed by others for research and development on the Company's behalf and indirect costs are expensed as operating expenses when incurred. Research and development costs totaled approximately $2.2 $1.6 March 27, 2021 March 28, 2020,
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment Property and equipment are stated at cost. Depreciation is calculated using the straight-line method over the estimated useful lives of the respective assets, which range from three ten The Company reviews its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not March 27, 2021 March 28, 2020, no
Warrants to Purchase Common Stock, Policy [Policy Text Block]	Warrants to Purchase Common Stock Warrants are accounted for in accordance with the applicable accounting guidance provided in ASC 815 Derivatives and Hedging
Income Tax, Policy [Policy Text Block]	Income Taxes Income taxes are accounted for using the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Future tax benefits are subject to a valuation allowance when management is unable to conclude that its deferred tax assets will more likely than not The Company considers all tax positions recognized in its financial statements for the likelihood of realization. When tax returns are filed, it is highly certain that some positions taken would be sustained upon examination by the taxing authorities, while others are subject to uncertainty about the merits of the positions taken or the amounts of the positions that would be ultimately sustained. The benefit of a tax position is recognized in the financial statements in the period during which, based on all available evidence, management believes it is more likely than not not 50
Share-based Payment Arrangement [Policy Text Block]	Stock-based Compensation The Company records stock-based compensation expense for the fair value of all stock options and restricted stock that are ultimately expected to vest as the requisite service is rendered. The cash flows resulting from the tax benefits resulting from tax deductions in excess of the compensation cost recognized for those options (excess tax benefits) are classified as cash flows from financing in the statements of cash flows. These excess tax benefits were not March 27, 2021 March 28, 2020. In calculating compensation related to stock option grants, the fair value of each stock option is estimated on the date of grant using the Black-Scholes-Merton option-pricing model. The computation of expected volatility used in the Black-Scholes- Merton option-pricing model is based on the historical volatility of Giga-tronics' share price. The expected term is estimated based on a review of historical employee exercise behavior with respect to option grants. Forfeitures are accounted for as they occur. We do not 2021, 107 not not no The fair value of restricted stock awards is based on the fair value of the underlying shares at the date of the grant. The Company records forfeitures as they occur.
Earnings Per Share, Policy [Policy Text Block]	Income or Loss Per Common Share Basic income or loss per common share is computed using the weighted average number of common shares outstanding during the period. Diluted EPS incorporate the incremental shares issuable upon the assumed exercise of stock options and warrants using the treasury stock method. Anti-dilutive options are not two
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income or Loss There are no
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Financial Instruments and Concentration of Credit Risk Financial instruments that potentially subject the Company to credit risk primarily consist of cash and trade accounts receivable. The Company's cash is deposited with federally insured financial institutions. Concentration of credit risk in trade accounts receivable results primarily from sales to major customers. The Company individually evaluates the creditworthiness of its customers and generally does not March 27, 2021, two 95% March 28, 2020, three 96%
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Value of Financial Instruments and Fair Value Measurements The Company's financial instruments consist principally of cash, line of credit, term debt, and warrant derivative liability. The fair value of a financial instrument is the amount at which the instrument could be exchanged in an orderly transaction between market participants to sell the asset or transfer the liability. The Company uses fair value measurements based on quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity can access as of the measurement date (Level 1 1 not 2 3

Note 3 - Inventories, Net (Tabl

Note 3 - Inventories, Net (Tables)	12 Months Ended
	Mar. 27, 2021
Notes Tables
Schedule of Inventory, Current [Table Text Block]	Category March 27, 2021 March 28, 2020 Raw materials $ 946 $ 890 Work-in-progress 2,418 1,828 Finished goods 129 263 Demonstration inventory 108 280 Total $ 3,601 $ 3,261

Note 4 - Property, Plant and _2

Note 4 - Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Mar. 27, 2021
Notes Tables
Property, Plant and Equipment [Table Text Block]	Category March 27, 2021 March 28, 2020 Leasehold improvements $ 648 $ 642 Machinery and equipment 4,631 4,566 Computer and software 705 681 Furniture and office equipment 107 107 Property, plant and equipment 6,091 5,996 Less: accumulated depreciation and amortization (5,636 ) (5,488 ) Property, plant and equipment, net $ 455 $ 508

Note 11 - Significant Custome_2

Note 11 - Significant Customers and Industry Segment Information (Tables)	12 Months Ended
	Mar. 27, 2021
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	March 27, 2021 (Dollars in thousands) Giga-tronics Division Microsource Total Revenue $ 3,670 $ 9,382 $ 13,052 Interest expense, net $ (97 ) $ — $ (97 ) Depreciation and amortization $ 253 $ — $ 253 Income (loss) before income taxes $ (642 ) $ 251 $ (391 ) Assets $ 5,281 $ 2,566 $ 7,847 March 28, 2020 (Dollars in thousands) Giga-tronics Division Microsource Total Revenue $ 3,521 $ 8,247 $ 11,768 Interest expense, net $ (252 ) $ — $ (252 ) Depreciation and amortization $ 315 $ — $ 315 Income (loss) before income taxes $ (802 ) $ 117 $ (685 ) Assets $ 6,011 $ 2,915 $ 8,926

Note 12 - Loss Per Common Sha_2

Note 12 - Loss Per Common Share (Tables)	12 Months Ended
	Mar. 27, 2021
Notes Tables
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	Fiscal Years Ended Amount (In Thousands) March 27, 2021 March 28, 2020 Stock options 375 241 Restricted stock awards — 20 Convertible preferred stock 180 180 Warrants 46 157 Total 601 598

Note 13 - Income Taxes (Tables)

Note 13 - Income Taxes (Tables)	12 Months Ended
	Mar. 27, 2021
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Provision for Income Taxes (Dollars in thousands) Fiscal Years ended March 27, 2021 March 28, 2020 Current Federal $ — $ — State 2 2 2 2 Deferred Federal — — State — — Total — — Provision for Income taxes $ 2 $ 2
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	(Dollars in thousands) As of March 27, 2021 March 28, 2020 Net operating loss carryforwards $ 2,373 11,568 Income tax credits 106 $ 365 Inventory reserves and additional costs capitalized 850 865 Fixed asset depreciation (30 ) 23 Accrued expenses 100 100 ASC 842 right of use asset 156 — ASC 842 lease liability (105 ) — Allowance for doubtful accounts 1 2 Non-qualified stock options — 91 Unrealized warrant gain — (33 ) State tax benefit (8 ) (8 ) Total deferred tax asset 3,443 12,973 Valuation allowance (3,443 ) (12,973 ) $ — $ —
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Fiscal Years ended (In thousands except percentages) March 27, 2021 March 28, 2020 Statutory federal income tax (benefit) $ (85 ) 21 % $ (164 ) 21 % Valuation allowance (9,530 ) 2,345 % 154 (20 )% State income tax, net of federal benefit (30 ) 7 % (54 ) 7 % Section 382-383 limitation 9,697 (2,386 )% - 0 % Non tax-deductible expenses (25 ) 6 % 81 (10 )% Tax credits generated (18 ) 4 % (18 ) 2 % Other (7 ) 2 % 3 (1 )% Effective income tax $ 2 (1 )% $ 2 (1 )%
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	Fiscal Years ended March 27, 2021 March 28, 2020 Balance as of beginning of year $ 132,000 $ 123,000 Increase (decrease) based on current year tax positions (80,000 ) 9,000 Balance as of end of year $ 52,000 $ 132,000

Note 14 - Stock Based Compens_2

Note 14 - Stock Based Compensation and Employee Benefits Plans (Tables)	12 Months Ended
	Mar. 27, 2021
Notes Tables
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Fiscal Years ended Category March 27, 2021 March 28, 2020 Dividend yield — — Expected volatility 106 % 105 % Risk-free interest rate 0.39 % 2.21 % Expected term (years) 5.50 8.35
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Description (Dollars in thousands except share prices) Shares Weighted Average Price per share Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding at March 30, 2019 182,366 $ 6.15 8.40 $ — Granted 73,880 4.98 9.20 — Forfeited / Expired (15,488 ) 5.13 — — Outstanding at March 28, 2020 240,758 $ 5.86 7.90 $ — Granted 148,000 3.53 9.30 — Forfeited / Expired (13,950 ) 4.15 — — Outstanding at March 27, 2021 374,808 $ 5.00 7.90 $ 99,310 Exercisable at March 27, 2021 153,395 $ 6.42 6.30 $ 2,823 Expected to vest in the future 178,682 $ 3.96 9.10 $ 83,097
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]	Restricted Stock Awards Shares Weighted Average Grant Date Fair Value Non-vested at March 31, 2019 22,343 $ 8.40 Granted 10,000 3.97 Vested (21,009 ) 8.25 Forfeited or cancelled (1,334 ) 12.00 Non-vested at March 28, 2020 10,000 3.97 Vested (10,000 ) 3.97 Non-vested at March 27, 2021 — $ —

Note 15 - Commitments and Con_2

Note 15 - Commitments and Contingencies (Tables)	12 Months Ended
	Mar. 27, 2021
Notes Tables
Lease, Cost [Table Text Block]	Lease Costs (Dollars in thousands) Fiscal Years ended Classification March 27, 2021 March 28, 2020 Operating lease costs Operating expenses $ 402 $ 518 Finance lease Amortization of lease assets Depreciation and amortization 8 34 Interest on lease liability Interest expense 1 5 Total lease costs $ 411 $ 557
Leases, Other Information [Table Text Block]	For the fiscal year ended March 27, 2021 Operating leases Finance leases Operating cash used for leases $ 572 $ — Financing cash used for leases $ — $ 46 Weighted-average remaining lease term 2.42 0.46 Weighted average discount rate 6.50 % 12.00 %
Finance and Operating Leases, Liability, Maturity [Table Text Block]	Future Lease Payments (Dollars in thousands) Operating leases Finance leases Total 2022 $ 503 $ 20 $ 523 2023 515 — 515 2024 209 — 209 Total future minimum lease payments 1,227 20 1,247 Less: imputed interest (74 ) (1 ) (75 ) Present value of lease liabilities $ 1,153 $ 19 $ 1,172

Note 16 - Warranty Obligations

Note 16 - Warranty Obligations (Tables)	12 Months Ended
	Mar. 27, 2021
Notes Tables
Schedule of Product Warranty Liability [Table Text Block]	Warranty Obligations (In thousands) Fiscal Years ended March 27, 2021 March 28, 2020 Balance at beginning of period $ 34 $ 104 Provision, net 17 (58 ) Warranty costs incurred — (12 ) Balance at end of period $ 51 $ 34

Note 17 - Preferred Stock and_2

Note 17 - Preferred Stock and Warrants (Tables)	12 Months Ended
	Mar. 27, 2021
Notes Tables
Schedule of Stock by Class [Table Text Block]	Preferred Stock Designated Shares Shares Liquidation Shares Issued Outstanding Preference Series B 10,000 9,997 9,245 $ 2,136 Series C 3,500 3,425 3,425 500 Series D 6,000 5,112 5,112 731 Series E 100,000 100,000 9,200 345 Total 119,500 118,534 26,982 $ 3,712

Note 1 - Summary of Significa_2

Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands	Dec. 12, 2019	Mar. 27, 2021USD ($)	Mar. 28, 2020USD ($)	Mar. 31, 2019USD ($)
Number of Leases		1
Operating Lease, Right-of-Use Asset		$ 865	$ 1,183
Operating Lease, Liability, Total		1,153
Research and Development Expense, Total		2,153	1,552
Asset Impairment Charges, Total		$ 0	$ 0
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Number of Major Customers		2	3
Concentration Risk, Percentage		95.00%	96.00%
Minimum [Member]
Warranty Term (Year)		1 year
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)		3 years
Maximum [Member]
Warranty Term (Year)		3 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)		10 years
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset				$ 1,400
Operating Lease, Liability, Total				$ 1,800
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	15

Note 2 - Cash (Details Textual)

Note 2 - Cash (Details Textual) - USD ($)	Mar. 27, 2021	Mar. 28, 2020
Cash and Cash Equivalents, at Carrying Value, Ending Balance	$ 736,000	$ 657,000
Cash, Uninsured Amount	$ 486,000	$ 407,000

Note 3 - Inventories, Net - Inv

Note 3 - Inventories, Net - Inventories, Net of Reserves (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Mar. 28, 2020
Raw materials	$ 946	$ 890
Work-in-progress	2,418	1,828
Finished goods	129	263
Demonstration inventory	108	280
Total	$ 3,601	$ 3,261

Note 4 - Property, Plant and _3

Note 4 - Property, Plant and Equipment, Net - Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Mar. 28, 2020
Property, plant, and equipment, gross	$ 6,091	$ 5,996
Less: accumulated depreciation and amortization	(5,636)	(5,488)
Property, plant and equipment, net	455	508
Leasehold Improvements [Member]
Property, plant, and equipment, gross	648	642
Machinery and Equipment [Member]
Property, plant, and equipment, gross	4,631	4,566
Computer Equipment [Member]
Property, plant, and equipment, gross	705	681
Furniture and Fixtures [Member]
Property, plant, and equipment, gross	$ 107	$ 107

Note 5 - Financed Receivables (

Note 5 - Financed Receivables (Details Textual) - Restated Financing Agreement [Member] - USD ($)	Mar. 11, 2019	Mar. 27, 2021	Mar. 28, 2020
Advance Rate, Percent of Invoices Issued	85.00%
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,500,000
Debt Instrument, Interest Rate, Stated Percentage	4.50%
Debt Instrument, Basis Spread on Variable Rate	1.00%
Debt Instrument, Fee Amount	$ 14,700
Debt Instrument, Basis Spread in Case of Default	5.00%
Long-term Line of Credit, Total		$ 683,382	$ 527,468
Non-Formula Basis Sub-Limit [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 500,000

Note 6 - Term Loan (Details Tex

Note 6 - Term Loan (Details Textual) - PFG Loan [Member] - USD ($)	Feb. 01, 2020	Jan. 31, 2020	Dec. 29, 2018	Mar. 27, 2021	Mar. 28, 2020	Apr. 27, 2017
Debt Instrument, Face Amount						$ 1,500,000
Debt Instrument, Interest Rate, Stated Percentage		16.00%				16.00%
Debt Instrument, Cash Interest Rate		9.50%				9.50%
Debt Instrument, Deferred Interest Rate		6.50%				6.50%
Debt Instrument, Maximum Fee Amount to be Paid upon Maturity						$ 100,000
Debt Instrument, Fee Amount		$ 16,500				76,000
Debt Instrument, Remaining Fee Amount						24,000
Debt Instrument, Remaining Fee Amount, Per Month						$ 1,000
Debt Instrument, Periodic Payment, Principal		$ 57,700	$ 75,000
Debt Instrument, Required Additional Capital To Extend Maturity			$ 500,000
Repayments of Long-term Debt, Total	$ 75,000
Long-term Debt, Total				$ 0	$ 792,300

Note 7 - Paycheck Protection _2

Note 7 - Paycheck Protection Program Loan Under the Cares Act (Details Textual) - USD ($)	Apr. 23, 2020	Mar. 27, 2021	Mar. 28, 2020
Proceeds from Issuance of Long-term Debt, Total		$ 2,920,000	$ 1,453,000
Paycheck Protection Program CARES Act [Member]
Proceeds from Issuance of Long-term Debt, Total	$ 786,200

Note 9 - Sales of Common Stock

Note 9 - Sales of Common Stock (Details Textual) - USD ($)	Mar. 11, 2020	Mar. 27, 2021	Mar. 28, 2020
Stock Issued During Period, Shares, New Issues (in shares)	146,668
Shares Issued, Price Per Share (in dollars per share)	$ 3.75
Stock Issued During Period, Value, New Issues	$ 550,004		$ 2,564,000
Proceeds from Issuance of Common Stock	$ 510,000		$ 2,564,000

Note 10 - Shareholder Rights _2

Note 10 - Shareholder Rights Plan (Details Textual)	Oct. 12, 2020$ / shares
Shareholder Rights Plan, Trigger, Beneficial Owner of Outstanding Common Shares, Percentage	15.00%
Shareholder Rights Plan, Exercise Price (in dollars per share)	$ 15
Shareholder Rights Plan, Exercise Input, Percentage of Fair Value of Common Stock	25.00%
Shareholder Rights Plan, Trigger, Assets or Earning Power Sold, Percentage	50.00%
Shareholder Rights Plan, Redemption Price (in dollars per share)	$ 0.001

Note 11 - Significant Custome_3

Note 11 - Significant Customers and Industry Segment Information (Details Textual)	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Number of Reportable Segments	2
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Number of Major Customers	3	3
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | U.S. Government and Defense-related Customers [Member]
Concentration Risk, Percentage	99.00%	85.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Two Prime Contractors [Member] | Microsource [Member]
Concentration Risk, Percentage	66.00%	64.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Customer Three [Member] | Gigatronics Division [Member]
Concentration Risk, Percentage	14.00%	18.00%
Export Sales [Member]
Concentration Risk, Percentage	1.00%	1.00%

Note 11 - Significant Custome_4

Note 11 - Significant Customers and Industry Segment Information - Segment Reporting Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Revenue	$ 13,052	$ 11,768
Interest expense, net	(97)	(252)
Depreciation and amortization	253	315
Income (loss) before income taxes	(391)	(685)
Assets	7,847	8,926
Gigatronics Division [Member]
Revenue	3,670	3,521
Interest expense, net	(97)	(252)
Depreciation and amortization	253	315
Income (loss) before income taxes	(642)	(802)
Assets	5,281	6,011
Microsource [Member]
Revenue	9,382	8,247
Interest expense, net
Depreciation and amortization
Income (loss) before income taxes	251	117
Assets	$ 2,566	$ 2,915

Note 12 - Loss Per Common Sha_3

Note 12 - Loss Per Common Share - Shares Excluded from the Diluted EPS Calculation (Details) - shares	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Anti-dilutive securities excluded from computation of earning per share (in shares)	601	598
Share-based Payment Arrangement, Option [Member]
Anti-dilutive securities excluded from computation of earning per share (in shares)	375,000	241,000
Restricted Stock [Member]
Anti-dilutive securities excluded from computation of earning per share (in shares)		20,000
Convertible Debt Securities [Member]
Anti-dilutive securities excluded from computation of earning per share (in shares)	180,000	180,000
Warrant [Member]
Anti-dilutive securities excluded from computation of earning per share (in shares)	46,000	157,000

Note 13 - Income Taxes (Details

Note 13 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020	Mar. 30, 2019
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ (9,530,000)
Unrecognized Tax Benefits, Ending Balance	52,000	$ 132,000	$ 123,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	0
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	9,716,000
Operating Loss Carryforwards, 382 Limitations	38,345,000
Operating Loss Carryforwards, Not Subject to Expiration	1,765,000
Operating Loss Carryforwards, 383 Limitations	$ 394,500
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Year	2018 2019 2020
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 4,721,000
Operating Loss Carryforwards, 382 Limitations	$ 19,612,000
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]
Open Tax Year	2017 2018 2019 2020

Note 13 - Income Taxes - Compon

Note 13 - Income Taxes - Components of the Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Federal
State	2	2
Current Income Tax Expense (Benefit), Total	2	2
Federal
State
Total
Provision for Income taxes	$ 2	$ 2

Note 13 - Income Taxes - Deferr

Note 13 - Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Mar. 28, 2020
Net operating loss carryforwards	$ 2,373	$ 11,568
Income tax credits	106	365
Inventory reserves and additional costs capitalized	850	865
Fixed asset depreciation	(30)
Fixed asset depreciation		23
Accrued expenses	100	100
ASC 842 right of use asset	156
ASC 842 lease liability	(105)
Allowance for doubtful accounts	1	2
Non-qualified stock options		91
Unrealized warrant gain		(33)
State tax benefit	(8)	(8)
Total deferred tax asset	3,443	12,973
Valuation allowance	$ (3,443)	$ (12,973)

Note 13 - Income Taxes - Effect

Note 13 - Income Taxes - Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Statutory federal income tax (benefit)	$ (85)	$ (164)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%
Valuation allowance	$ (9,530)	$ 154
Valuation allowance, percent	2345.00%	(20.00%)
State income tax, net of federal benefit	$ (30)	$ (54)
State income tax, net of federal benefit, percent	7.00%	7.00%
Section 382-383 limitation	$ 9,697
Section 382-383 limitation	(2386.00%)	0.00%
Non tax-deductible expenses	$ (25)	$ 81
Non tax-deductible expenses, percent	6.00%	(10.00%)
Tax credits generated	$ (18)	$ (18)
Tax credits generated, percent	4.00%	2.00%
Other	$ (7)	$ 3
Other, percent	2.00%	(1.00%)
Effective income tax	$ 2	$ 2
Effective income tax, percent	(1.00%)	(1.00%)

Note 13 - Income Taxes - Liabil

Note 13 - Income Taxes - Liability for Uncertain Tax Positions (Details) - USD ($)	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Balance as of beginning of year	$ 132,000	$ 123,000
Decrease based on current year tax positions	(80,000)
Increase based on current year tax positions		9,000
Balance as of end of year	$ 52,000	$ 132,000

Note 14 - Stock Based Compens_3

Note 14 - Stock Based Compensation and Employee Benefits Plans (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 27, 2021	Mar. 27, 2021	Mar. 28, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		148,000	73,880
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)		$ 3.48	$ 3.75
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		3 years 109 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares (in shares)		76,153	48,956
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value		$ 366,878	$ 206,255
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)		0	0
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent		100.00%
Defined Contribution Plan, Vesting Period (Year)		4 years
Defined Contribution Plan, Employer Discretionary Contribution Amount		$ 17,000	$ 22,000
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 488,000	488,000
Share-based Payment Arrangement, Expense		$ 314,300	$ 213,000
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)		0	0
Restricted Stocks [Member]
Share-based Payment Arrangement, Expense		$ 39,700	$ 88,000
The 2018 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)	416,667	416,667
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)	144,443	144,443
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	138,000
The 2018 Equity Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	1 year
The 2018 Equity Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		4 years
The 2018 Equity Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		5 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)		10 years
Equity Incentive Plan 2005 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)	0	0
Restricted Stocks [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 0	$ 0

Note 14 - Stock Based Compens_4

Note 14 - Stock Based Compensation and Employee Benefits Plans - Weighted Average Assumptions (Details)	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Dividend yield
Expected volatility	106.00%	105.00%
Risk-free interest rate	0.39%	2.21%
Expected term (Year)	5 years 182 days	8 years 127 days

Note 14 - Stock Based Compens_5

Note 14 - Stock Based Compensation and Employee Benefits Plans - Changes in Stock Options Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020	Mar. 30, 2019
Outstanding, Shares (in shares)	240,758	182,366
Outstanding, weighted average exercise price (in dollars per share)	$ 5.86	$ 6.15
Outstanding, Weighted average remaining contractual terms (Year)	7 years 328 days	7 years 328 days	8 years 146 days
Outstanding	$ 99,310
Granted, Shares (in shares)	148,000	73,880
Granted, weighted average exercise price (in dollars per share)	$ 3.53	$ 4.98
Granted, Weighted average remaining contractual terms (Year)	9 years 109 days	9 years 73 days
Forfeited / Expired, Shares (in shares)	(13,950)	(15,488)
Forfeited / Expired, weighted average exercise price (in dollars per share)	$ 4.15	$ 5.13
Outstanding, Shares (in shares)	374,808	240,758	182,366
Outstanding, weighted average exercise price (in dollars per share)	$ 5	$ 5.86	$ 6.15
Exercisable, Shares (in shares)	153,395
Exercisable, weighted average exercise price (in dollars per share)	$ 6.42
Exercisable, Weighted average remaining contractual terms (Year)	6 years 109 days
Exercisable	$ 2,823
Expected to vest in the future, Shares (in shares)	178,682
Expected to vest in the future, weighted average exercise price (in dollars per share)	$ 3.96
Expected to vest in the future, Weighted average remaining contractual terms (Year)	9 years 36 days
Expected to vest in the future	$ 83,097

Note 14 - Stock Based Compens_6

Note 14 - Stock Based Compensation and Employee Benefits Plans - Changes in Nonvested Restricted Stock Awards Outstanding (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Non-Vested, Shares (in shares)	10,000	22,343
Non-vested, Weighted average fair value (in dollars per share)	$ 3.97	$ 8.40
Granted, Shares (in shares)		10,000
Granted, Weighted average fair value (in dollars per share)		$ 3.97
Vested, Shares (in shares)	(10,000)	(21,009)
Vested, Weighted average fair value (in dollars per share)	$ 3.97	$ 8.25
Forfeited or cancelled, shares (in shares)		(1,334)
Forfeited or cancelled, Weighted average fair value (in dollars per share)		$ 12
Non-Vested, Shares (in shares)		10,000
Non-vested, Weighted average fair value (in dollars per share)		$ 3.97

Note 15 - Commitments and Con_3

Note 15 - Commitments and Contingencies (Details Textual) - ft²	Mar. 01, 2020	Feb. 01, 2019	Jan. 05, 2017
Dublin, CA [Member]
Lessee, Operating Lease, Term of Contract (Month)			6 years 150 days
Area of Real Estate Property (Square Foot)			23,873
Nashua NH [Member]
Area of Real Estate Property (Square Foot)	2,400	1,200

Note 15 - Commitments and Con_4

Note 15 - Commitments and Contingencies - Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Operating lease costs	$ 402	$ 518
Amortization of lease assets	8	34
Interest on lease liability	1	5
Total lease costs	$ 411	$ 557

Note 15 - Commitments and Con_5

Note 15 - Commitments and Contingencies - Other Information (Details) $ in Thousands	12 Months Ended
	Mar. 27, 2021USD ($)
Operating cash used for leases	$ 572
Financing cash used for leases	$ 46
Weighted-average remaining lease term, operating leases (Year)	2 years 153 days
Weighted-average remaining lease term, finance leases (Year)	167 days
Weighted average discount rate, operating leases	6.50%
Weighted average discount rate, finance leases	12.00%

Note 15 - Commitments and Con_6

Note 15 - Commitments and Contingencies - Future Lease Payments (Details) $ in Thousands	Mar. 27, 2021USD ($)
Operating leases, 2022	$ 503
Finance leases, 2022	20
Total, 2022	523
Operating leases, 2023	515
Finance leases, 2023
Total, 2023	515
Operating leases, 2024	209
Finance leases, 2024
Total, 2024	209
Total future minimum lease payments, operating leases	1,227
Total future minimum lease payments, finance leases	20
Total future minimum lease payments	1,247
Less: imputed interest, operating leases	(74)
Less: imputed interest, finance leases	(1)
Less: imputed interest, total	(75)
Operating leases, present value of lease liabilities	1,153
Finance leases, present value of lease liabilities	19
Total present value of lease liabilities	$ 1,172

Note 16 - Warranty Obligation_2

Note 16 - Warranty Obligations - Reconciliation of Company's Warranty Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Balance at beginning of period	$ 34	$ 104
Provision, net	17	(58)
Warranty costs incurred		(12)
Balance at end of period	$ 51	$ 34

Note 17 - Preferred Stock and_3

Note 17 - Preferred Stock and Warrants (Details Textual) - USD ($)	Mar. 11, 2020	Nov. 07, 2019	Mar. 26, 2018	Mar. 30, 2019
Shares Issued, Price Per Share (in dollars per share)	$ 3.75
Stock Issued During Period, Shares, New Issues (in shares)	146,668
Conversion of Series E Preferred Stock into Common Stock [Member]
Conversion of Stock, Shares Issued (in shares)		896,636
Conversion of Stock, Shares Converted (in shares)		88,600
Series E Preferred Stock Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights, Percentage of Common Shares Into Which the Preferred Shares Can Be Converted				5.00%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				6.67
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)				$ 3.75
Series E Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage			6.00%
Shares Issued, Price Per Share (in dollars per share)			$ 25	$ 25
Stock Issued During Period, Shares, New Issues (in shares)				56,200
Proceeds from Issuance of Preferred Stock and Preference Stock				$ 1,405,000
Proceeds from Issuance of Preferred Stock and Preference Stock, Net of Issuance Costs				1,200,000
Payments of Stock Issuance Costs				$ 212,000
Stock Issued During Period, Placement Agent Fees, Percentage of Gross Proceeds				5.00%
Series E Preferred Stock [Member] | Placement Agent [Member]
Payments of Stock Issuance Costs				$ 56,875

Note 17 - Preferred Stock and_4

Note 17 - Preferred Stock and Warrants - Preferred Stock Information (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Mar. 28, 2020
Designated shares (in shares)	1,000,000	1,000,000
Series B Preferred Stock [Member]
Designated shares (in shares)	10,000
Shares issued (in shares)	9,997
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	9,245
Liquidation preference	$ 2,136
Series C Preferred Stock [Member]
Designated shares (in shares)	3,500
Shares issued (in shares)	3,425
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	3,425
Liquidation preference	$ 500
Series D Preferred Stock [Member]
Designated shares (in shares)	6,000
Shares issued (in shares)	5,112
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	5,112
Liquidation preference	$ 731
Series E Preferred Stock [Member]
Designated shares (in shares)	100,000	100,000
Shares issued (in shares)	9,200	9,200
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	9,200	9,200
Liquidation preference	$ 345	$ 345
Series B, C, D, and E Preferred Stock [Member]
Designated shares (in shares)	119,500
Shares issued (in shares)	118,534
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	26,982
Liquidation preference	$ 3,712

Note 19 - Subsequent Events (De

Note 19 - Subsequent Events (Details Textual) - USD ($)	Jun. 04, 2021	Apr. 27, 2021	Mar. 11, 2020	Nov. 07, 2019	Mar. 28, 2020	Mar. 30, 2019	Mar. 27, 2021	Mar. 26, 2018
Stock Issued During Period, Shares, New Issues (in shares)			146,668
Shares Issued, Price Per Share (in dollars per share)			$ 3.75
Stock Issued During Period, Value, New Issues			$ 550,004		$ 2,564,000
Series E Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)						56,200
Shares Issued, Price Per Share (in dollars per share)						$ 25		$ 25
Preferred Stock, Shares Outstanding, Ending Balance (in shares)					9,200		9,200
Conversion of Series E Preferred Stock into Common Stock [Member]
Conversion of Stock, Shares Issued (in shares)				896,636
Conversion of Stock, Shares Converted (in shares)				88,600
Subsequent Event [Member] | Series E Preferred Stock [Member]
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	5,700
Subsequent Event [Member] | Conversion of Series E Preferred Stock into Common Stock [Member]
Conversion of Stock, Shares Issued (in shares)	35,000
Conversion of Stock, Shares Converted (in shares)	3,500
Private Placement [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues (in shares)	45,153
Shares Issued, Price Per Share (in dollars per share)	$ 3.25
Stock Issued During Period, Value, New Issues	$ 150,000
Private Placement [Member] | Prefunded Warrants [Member] | Subsequent Event [Member]
Class of Warrant or Right, Number of Warrants Issued (in shares)		461,538
Class of Warrant or Right, Price Per Warrant (in dollars per share)		$ 3.25
Proceeds from Issuance of Warrants		$ 1,500,000
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)		1
Class of Warrant or Right, Maximum Common Stock Ownership Percentage After The Exercise		9.99%