Butler National (BUKS) 10-K 15 Jul 22 2022 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Apr. 30, 2022	Jul. 15, 2022	Oct. 31, 2021
Document Information [Line Items]
Entity Central Index Key	0000015847
Entity Registrant Name	BUTLER NATIONAL CORP
Amendment Flag	false
Current Fiscal Year End Date	--04-30
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Document Type	10-K
Document Annual Report	true
Document Period End Date	Apr. 30, 2022
Document Transition Report	false
Entity File Number	0-1678
Entity Incorporation, State or Country Code	KS
Entity Tax Identification Number	41-0834293
Entity Address, Address Line One	19920 West 161st Street
Entity Address, City or Town	Olathe
Entity Address, State or Province	KS
Entity Address, Postal Zip Code	66062
City Area Code	913
Local Phone Number	780-9595
Title of 12(b) Security	Common Stock $.01 Par Value
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 39,797,724
Entity Common Stock, Shares Outstanding		76,458,146
Auditor Name	RBSM LLP
Auditor Location	Las Vegas, NV
Auditor Firm ID	587

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
CURRENT ASSETS:
Cash	$ 12,487	$ 22,022
Accounts receivable, net of allowance for doubtful accounts	3,636	1,961
Inventories
Parts and raw materials	4,722	4,829
Work in process	4,080	3,657
Finished goods	70	82
Total inventory, net of allowance	8,872	8,568
Contract asset	1,470	421
Prepaid expenses and other current assets	1,361	1,496
Total current assets	27,826	34,468
PROPERTY, PLANT AND EQUIPMENT:
Lease right-to-use asset	3,240	3,099
Construction in progress	6,417	1,170
Land	4,751	4,751
Building and improvements	40,962	39,747
Aircraft	8,719	9,138
Machinery and equipment	4,917	4,253
Office furniture and fixtures	11,826	10,699
Leasehold improvements	4,032	4,032
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization	84,864	76,889
Accumulated depreciation	(23,290)	(20,519)
Total property, plant and equipment	61,574	56,370
SUPPLEMENTAL TYPE CERTIFICATES (net of accumulated amortization of $9,336 at April 30, 2022 and $8,041 at April 30, 2021)	8,018	8,211
OTHER ASSETS:
Other assets (net of accumulated amortization of $11,575 at April 30, 2022 and $10,886 at April 30, 2021)	1,621	2,872
Deferred tax asset, net	1,770	0
Total other assets	3,391	2,872
Total assets	100,809	101,921
CURRENT LIABILITIES:
Current maturities of long-term debt	5,165	5,972
Current maturities of lease liability	106	107
Accounts payable	2,773	1,893
Contract liability	820	5,798
Gaming facility mandated payment	1,630	1,458
Compensation and compensated absences	1,911	1,862
Income tax payable	1,049	212
Other current liabilities	211	265
Total current liabilities	13,665	17,567
Long-term debt, net of current maturities	43,411	39,816
Lease liability, net of current maturities	2,899	2,759
Deferred tax liability, net	0	400
Total long-term liabilities	46,310	42,975
Total liabilities	59,975	60,542
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Common stock, par value $.01: authorized 100,000,000 shares issued 80,348,572 shares, and outstanding 76,458,146 shares at April 30, 2022 and issued 79,070,382 shares, and outstanding 75,366,749 shares at April 30, 2021	803	790
Capital contributed in excess of par	12,160	16,900
Treasury stock at cost, 3,890,426 shares at April 30, 2022 and 3,703,633 shares at April 30, 2021	(2,077)	(1,909)
Retained earnings	29,948	19,580
Total Butler National Corporation's stockholders' equity	40,834	35,361
Noncontrolling interest in BHCMC, LLC	0	6,018
Total stockholders' equity	40,834	41,379
Total liabilities and stockholders' equity	100,809	101,921
Preferred Class A [Member]
STOCKHOLDERS' EQUITY:
Preferred stock	0	0
Preferred Class B [Member]
STOCKHOLDERS' EQUITY:
Preferred stock	$ 0	$ 0

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Supplemental type certificates, accumulated amortization	$ 9,336	$ 8,041
Other assets, accumulated amortization	$ 11,575	$ 10,866
Preferred stock, par value (in dollars per share)	$ 5	$ 5
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	80,348,572	79,070,382
Common stock, shares outstanding (in shares)	76,458,146	75,366,749
Treasury stock, shares (in shares)	3,890,426	3,703,633
Preferred Class A [Member]
Preferred stock, stated value (in dollars per share)	$ 100	$ 100
Preferred stock, dividend rate	9.80%	9.80%
Preferred stock, liquidation value	$ 100	$ 100
Preferred stock, redemption value	$ 100	$ 100
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, designated classes (in shares)	200,000	200,000
Preferred Class B [Member]
Preferred stock, stated value (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, dividend rate	6%	6%
Preferred stock, liquidation value	$ 1,000	$ 1,000
Preferred stock, redemption value	$ 1,000	$ 1,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, designated classes (in shares)	200,000	200,000

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
REVENUES:
Revenues	$ 73,473	$ 61,480
COSTS AND EXPENSES:
Marketing and advertising	5,236	3,752
Employee benefits	2,573	2,571
Depreciation and amortization	2,815	3,542
General, administrative and other	8,488	8,208
Total costs and expenses	57,344	55,580
OPERATING INCOME	16,129	5,900
OTHER INCOME (EXPENSE):
Interest expense	(2,689)	(3,138)
Forgiveness of debt	(2,001)	0
Gain on sale of airplanes	75	0
Other	0	7
Total other income (expense)	(613)	(3,131)
INCOME BEFORE INCOME TAXES	15,516	2,769
PROVISION (BENEFIT) FOR INCOME TAXES
Provision for income taxes	3,102	536
Deferred income tax (benefit)	174	(225)
NET INCOME	12,240	2,458
Net (income) loss attributable to noncontrolling interest in BHCMC, LLC	(1,872)	(1,025)
NET INCOME ATTRIBUTABLE TO BUTLER NATIONAL CORPORATION	$ 10,368	$ 1,433
BASIC EARNINGS PER COMMON SHARE ATTRIBUTABLE TO BUTLER NATIONAL CORPORATION (in dollars per share)	$ 0.14	$ 0.02
WEIGHTED AVERAGE SHARES USED IN PER SHARE CALCULATION (in shares)	75,340,131	74,144,957
DILUTED EARNINGS PER COMMON SHARE ATTRIBUTABLE TO BUTLER NATIONAL CORPORATION (in dollars per share)	$ 0.14	$ 0.02
WEIGHTED AVERAGE SHARES USED IN PER SHARE CALCULATION (in shares)	75,340,131	74,144,957
Professional Services [Member]
REVENUES:
Revenues	$ 39,147	$ 30,205
COSTS AND EXPENSES:
Cost of services and products	15,798	14,214
Aerospace Products [Member]
REVENUES:
Revenues	34,326	31,275
COSTS AND EXPENSES:
Cost of services and products	$ 22,434	$ 23,293

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Apr. 30, 2020	77,719,677		3,321,415
Balance at Apr. 30, 2020	$ 777	$ 15,600	$ (1,713)	$ 18,147	$ 32,811	$ 4,993	$ 37,804
Issuance of stock benefit plan (in shares)	1,400,705		0				1,400,705
Issuance of stock benefit plan	$ 14	707	$ 0	0	721	0	$ 721
Stock repurchase (in shares)	0		382,218
Stock repurchase	$ 0	0	$ (196)	0	(196)	0	(196)
Deferred compensation, restricted stock	(1)	593	0	0	592	0	592
Net Income	$ 0	0	$ 0	1,433	1,433	1,025	2,458
Balance (in shares) at Apr. 30, 2021	79,070,382		3,703,633
Balance at Apr. 30, 2021	$ 790	16,900	$ (1,909)	19,580	35,361	6,018	$ 41,379
Issuance of stock benefit plan (in shares)	1,328,190		0				1,328,190
Issuance of stock benefit plan	$ 13	794	$ 0	0	807	0	$ 807
Stock repurchase (in shares)	0		186,793
Stock repurchase	$ 0	0	$ (168)	0	(168)	0	(168)
Deferred compensation, restricted stock	0	585	0	0	585	0	585
Net Income	0	0	0	10,368	10,368	1,872	12,240
Purchase of non-controlling interest in BHCMC, LLC	$ 0	(6,119)	$ 0	0	(6,119)	(7,890)	(14,009)
Deferred compensation, restricted stock (in shares)	(50,000)		0
Balance (in shares) at Apr. 30, 2022	80,348,572		3,890,426
Balance at Apr. 30, 2022	$ 803	$ 12,160	$ (2,077)	$ 29,948	$ 40,834	$ 0	$ 40,834

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 12,240	$ 2,458
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	5,281	5,856
Forgiveness of debt	(2,001)	0
Stock issued for benefit plan	807	721
Deferred income tax (benefit)	174	(225)
Gain on sale of airplanes	(75)	0
Deferred compensation, restricted stock	585	592
Changes in operating assets and liabilities
Accounts receivable	(1,675)	823
Inventories	(304)	47
Contract asset	(1,049)	(226)
Prepaid expenses and other assets	141	123
Accounts payable	880	931
Contract liability	(4,978)	3,609
Lease liability	0	(659)
Accrued liabilities	49	(709)
Gaming facility mandated payment	172	120
Income tax payable	837	6
Other liabilities	(54)	(9)
Net cash provided by operating activities	11,030	13,458
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,579)	(6,992)
Proceeds from sale of airplanes	75	0
Net cash used in investing activities	(9,504)	(6,992)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowings of long-term debt	1,262	2,479
Repayments of long-term debt	(4,388)	(3,380)
Payments on lease liability	(108)	(140)
Repurchase of common stock	(168)	(196)
Net cash used in financing activities	(11,061)	(1,237)
NET INCREASE (DECREASE) IN CASH	(9,535)	5,229
CASH, beginning of year	22,022	16,793
CASH, end of year	12,487	22,022
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Interest paid	2,684	3,034
Income taxes paid	2,265	535
NON CASH INVESTING AND FINANCING ACTIVITY
Notes receivable forgiven as part of purchase of noncontrolling interest in BHCMC, LLC	780	0
Deferred tax asset relating to the purchase of noncontrolling interest in BHCMC, LCC	2,344	0
Purchase of noncontrolling interest - note receivable and other liabilities	6,350	0
Lease right-of-use assets purchased	247	38,622
Lease liability for purchase of assets under lease	0	39,709
Notes Payable to Bank [Member]
NON CASH INVESTING AND FINANCING ACTIVITY
Secured notes payable for purchase of noncontrolling interest in BHCMC, LLC, net	7,914	0
Notes Payable [Member]
NON CASH INVESTING AND FINANCING ACTIVITY
Secured notes payable for purchase of noncontrolling interest in BHCMC, LLC, net	0	41,205
BHCMC, LLC [Member]
CASH FLOWS FROM FINANCING ACTIVITIES
Purchase of noncontrolling interest in BHCMC, LLC	$ (7,659)	$ 0

Note 1 - Nature of Operations,

Note 1 - Nature of Operations, Organization and Significant Accounting Policies	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. NATURE OF OPERATIONS, ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES: The accompanying consolidated financial statements include the accounts of Butler National Corporation (BNC) and its wholly-owned active subsidiaries, Avcon Industries, Inc., BCS Design, Inc., Butler National Service Corporation, Butler National Corporation-Tempe, Butler Avionics, Inc., Butler National, Inc., Butler Temporary Services, Inc., Kansas International Corporation, Kansas International DDC, LLC, and BHCMC, LLC (collectively, The Company). These consolidated financial statements and related notes are presented in accordance with generally accepted accounting principles in the United States (“GAAP”), expressed in U.S. dollars. All amounts are in thousands, except share and par values, unless otherwise noted. All significant intercompany balances and transactions have been eliminated in consolidation. The fiscal year end of the Company is April 30. Avcon Industries, Inc. modifies business category aircraft at its Newton, Kansas facility. Modifications can include passenger-to-freighter configuration, addition of aerial photography capability, ISR modifications, and stability enhancing modifications. Butler Avionics, Inc. sells, installs and repairs avionics equipment (airplane radio equipment and flight control systems). Butler National, Inc. acquires airplanes, principally Learjets, to refurbish and sell. Butler Temporary Services, Inc. processes company payroll. Kansas International Corporation and Kansas International DDC, LLC own property. Butler National Corporation-Tempe is primarily engaged in the manufacture electronic upgrades for classic weapon control systems used by the military. Butler National Service Corporation is a management consulting and administrative services firm providing business planning and financial coordination to Indian tribes interested in owning and operating casinos under the terms of the Indian Gaming Regulatory Act of 1988. SIGNIFICANT ACCOUNTING POLICIES: a) Accounts receivable: Accounts receivable are carried on a gross basis, with no not no b) Use of Estimates: The preparation of financial statements in conformity with generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Future events and their effects cannot be determined with certainty. Therefore, the determination of estimates requires the exercise of judgment. Actual results could differ from those estimates, and any such differences may c) Inventories: Inventories are priced at the lower of cost, determined on a first first Inventory obsolescence is examined on a regular basis. When determining our estimate of obsolescence, we consider inventory that has been inactive for five April 30, 2022 2021 d) Property and Related Depreciation: Machinery and equipment are recorded at cost and depreciated over their estimated useful lives. Depreciation is provided on a straight-line basis. The lives used for the significant items within each property classification range from 3 to 39 years. Maintenance and repairs are charged to expense as incurred. The cost and accumulated depreciation of assets retired are removed from the accounts and any resulting gains or losses are reflected as income or expense. e) Long-Lived Assets: The Company accounts for its long-lived assets in accordance with ASC Topic 360 10, 360 10 may no f) Other Assets: Our other asset account includes assets of $5,500 related to the Kansas Expanded Lottery Act Management Contract privilege fee, $6,151 of gaming equipment we were required to pay for ownership by the State of Kansas Lottery, and JET autopilot intellectual property of $1,417, and miscellaneous other assets of $128. BHCMC expects the $5,500 December 2024. December 15, 2024, 2039, 15 three fifteen April 30, 2022 2021 Other assets net values are as follows: (dollars in thousands) 2022 2021 Privilege fee $ 5,500 $ 5,500 Less amortized costs 4,372 3,949 Privilege fee balance $ 1,128 $ 1,551 Intangible gaming equipment $ 6,151 $ 5,927 Less amortized costs 5,868 5,696 Intangible gaming equipment balance $ 283 $ 231 JET autopilot intellectual property $ 1,417 $ 1,417 Less amortized costs 1,335 1,241 JET autopilot intellectual property balance $ 82 $ 176 g) Supplemental Type Certificates: Supplemental Type Certificates (STCs) are authorizations granted by the Federal Aviation Administration (FAA) for specific modification of a certain aircraft. The STC authorizes us to perform modifications, installations, and assemblies on applicable customer-owned aircraft. Costs incurred to obtain STCs are capitalized and subsequently amortized over seven April 30, 2022 2021 (dollars in thousands) 2022 2021 Direct labor $ 3,342 $ 3,387 Direct materials 5,227 4,108 Consultant costs 3,083 2,983 Overhead 5,702 5,774 17,354 16,252 Less-amortized costs 9,336 8,041 STC balance $ 8,018 $ 8,211 h) Revenue Recognition: ASC Topic 606, Under ASC 606, five 1 A contract with a customer exists when (i) the Company enters into an enforceable contract with a customer that defines each party’s rights regarding the services to be transferred and identifies the payment terms related to these services, (ii) the contract has commercial substance and (iii) the Company determines that collection of substantially all consideration for services that are transferred is probable based on the customer’s intent and ability to pay the promised consideration. 2 At contract inception, an entity shall assess the goods or services promised in a contract with a customer and shall identify as a performance obligation each promise to transfer to the customer. Performance obligations promised in a contract are identified based on the services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the service either on its own or together with other resources that are readily available from third not 3 The transaction price is the amount that an entity allocates to the performance obligations identified in the contract and, therefore, represents the amount of revenue recognized as those performance obligations are satisfied. The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer. 4 Once a contract and associated performance obligations have been identified and the transaction price has been determined, ASC 606 5 Revenue is recognized when or as performance obligations are satisfied by transferring control of a promised good or service to a customer. Control transfers either over time or at a point in time. Revenue is recognized when control of the promised services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those services. Aircraft modifications are performed under fixed-price contracts. Revenue from fixed-priced contracts are recognized on the percentage-of-completion method, measured by the direct labor incurred compared to total estimated direct labor. Using direct labor best represents the progress on a contract. Revenue from Avionics products are recognized when shipped. Payment for these Avionics products is due within 30 days of the invoice date after shipment. Revenue from Gaming Management and other Corporate/Professional Services is recognized as the service is rendered. Regarding warranties and returns, our products are special order and are not may not Gaming revenue is the gross gaming win as reported by the Kansas Lottery casino reporting systems, less the mandated payments by and for the State of Kansas. Electronic games-slots and table games revenue is the aggregate of gaming wins and losses. Liabilities are recognized for chips and "ticket-in, ticket-out" coupons in the customers' possession, and for accruals related to anticipated payout of progressive jackpots. Progressive gaming machines, which contain base jackpots that increase at a progressive rate based on the number of coins played, are deducted from revenue as the value of jackpots increase. Food, beverage, and other revenue is recorded when the service is received and paid. i) Fair Value Measurements: Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability. Assets and liabilities recorded at fair value are measured and classified in accordance with a three Level 1 Level 2 not Level 3 no The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. For certain financial instruments, including cash and cash equivalents, short-term investments, accounts receivable, marketable securities, notes payable, and accounts payable, the carrying amounts approximate fair value. We do not We measure certain other instruments, including stock-based compensation awards settled in the stock also at fair value. The determination of fair value involves the use of appropriate valuation methods and relevant inputs into valuation models. j) Slot Machine Jackpots: If the casino is not No k) Gaming Facility Mandated Payment: Boothill Casino is contractually obligated to pay its proportionate share of certain expenses incurred by the Kansas Lottery Commission and the Kansas Racing and Gaming Commission, which amounted to $1,968 and $1,868 in the fiscal year ended April 30, 2022 2021 l) Advanced Payments and Billings in Excess of Costs Incurred: We receive advances, performance-based payments and progress payment from customers which may m) Earnings Per Share: Earnings per common share is based on the weighted average number of common shares outstanding during the year. The computation of the Company basic and diluted earnings per common share is as follows: (in thousands, except share and per share data) 2022 2021 Net income attributable to Butler National Corporation $ 10,368 $ 1,433 Weighted average common shares outstanding 75,340,131 74,144,957 Dilutive effect of non-qualified stock option plans - - Weighted average common shares outstanding, assuming dilution 75,340,131 74,144,957 Potential common shares if all options were exercised and shares issued 75,340,131 74,144,957 Basic earnings per common share $ 0.14 $ 0.02 Diluted earnings per common share $ 0.14 $ 0.02 n) Stock-based Compensation: The Company accounts for stock-based compensation under ASC 718, Accounting for Stock-Based Compensation o) Income Taxes: The Company utilizes ASC 740, not p) Cash and Cash Equivalents: Cash and cash equivalents consist primarily of cash and investments in a money market fund. We consider all highly liquid investments with an original maturity of three may April 30, 2022 2021 q) Concentration of Credit Risk: We extend credit to customers based on an evaluation of their financial condition and collateral is not r) Research and Development: We invested in research and development activities. The amount invested in the year ended April 30, 2022 2021 s) Reclassifications: Certain reclassifications within the financial statement captions have been made to maintain consistency in presentation between years. These reclassifications have no

Note 2 - Disaggregation of Reve

Note 2 - Disaggregation of Revenue	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Disaggregation of Revenue [Text Block]	2. DISAGGREGATION OF REVENUE: In the following table, revenue is disaggregated by primary geographical market, major product line, and timing of revenue recognition. Year Ended April 30, 2022 Professional Services Aerospace Products Total Geographical Markets North America $ 39,147 $ 29,258 $ 68,405 Europe - 2,803 2,803 Asia - 1,228 1,228 Australia and Other - 1,037 1,037 $ 39,147 $ 34,326 $ 73,473 Major Product Lines Casino Gaming Revenues $ 34,411 $ - $ 34,411 Casino Non-Gaming Revenues 4,358 - 4,358 Professional Services 378 - 378 Aircraft Modification - 21,399 21,399 Aircraft Avionics - 2,373 2,373 Special Mission Electronics - 10,554 10,554 $ 39,147 $ 34,326 $ 73,473 Contract Types / Revenue Recognition Timing Percentage of completion contracts $ - $ 19,507 $ 19,507 Goods or services transferred at a point of sale 39,147 14,819 53,966 $ 39,147 $ 34,326 $ 73,473 Year Ended April 30, 2021 Professional Services Aerospace Products Total Geographical Markets North America $ 30,205 $ 25,537 $ 55,742 Europe - 3,427 3,427 Asia - 1,332 1,332 Australia and Other - 979 979 $ 30,205 $ 31,275 $ 61,480 Major Product Lines Casino Gaming Revenues $ 26,811 $ - $ 26,811 Casino Non-Gaming Revenues 3,140 - 3,140 Professional Services 254 - 254 Aircraft Modification - 21,750 21,750 Aircraft Avionics - 2,583 2,583 Special Mission Electronics - 6,942 6,942 $ 30,205 $ 31,275 $ 61,480 Contract Types / Revenue Recognition Timing Percentage of completion contracts $ - $ 19,280 $ 19,280 Goods or services transferred at a point of sale 30,205 11,995 42,200 $ 30,205 $ 31,275 $ 61,480

Note 3 - Accounts Receivable, N

Note 3 - Accounts Receivable, Net, Contract Asset and Contract Liability	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Text Block]	3. ACCOUNTS RECEIVABLE, NET, CONTRACT ASSET AND CONTRACT LIABILITY: Accounts Receivables, net, contract asset and contract liability were as follows (in thousands): 2022 2021 Accounts Receivable, net $ 3,636 $ 1,961 Contract Asset 1,470 421 Contract Liability 820 5,798 Accounts Receivables, net consist of $3,636 and $1,961 from customers as of April 30, 2022 April 30, 2021, April 30, 2022 2021 April 30, 2022 2021. 2022, 2022 not no 2022 2021. April 30, 2022 2023. 2022, 2022, April 30, 2021 2021, April 30, 2020

Note 4 - Debt

Note 4 - Debt	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Debt Disclosure [Text Block]	4. DEBT: Principal amounts of debt at April 30, 2022 2021 Promissory Notes 2022 2021 Bank line of credit, available LOC $2.0 million interest at 3.65% due on demand, collateralized by a first and second position on all assets of the Company. - - $ - $ - Long-Term Debt Note payable, interest at 6.25% due January 2023, collateralized by an Aircraft Security Agreement. 534 1,138 Note payable, interest at 6.25%, due June 2024, collateralized by real estate. 181 202 Note payable, interest at 4.5%, paid off in 2022. - 21 Note payable, interest at SOFR plus 1.75% due March 2029, collateralized by real estate. 1,106 1,267 Note payable, interest at SOFR plus 1.75% due March 2029 collateralized by real estate. 507 581 Note payable, interest at 5.32%, this note matures in December 2027, with a balloon payment of $19,250, collateralized by all of BHCMC's assets and compensation due under the State Management Contract. 32,667 34,417 Note payable, interest at 5.75%, this note matures October 2026, collateralized by all of BHCMC's assets and compensation due under the State Management Contract. 12,721 6,533 Note payable, interest at 4.35%, due March 2029, collateralized by Aircraft Security Agreements 1,197 - Note payable, interest at 8.13%, due October 2025, collateralized by equipment 52 - Paycheck Protection Program loan, interest at 1%, this loan was received for the professional services segment. In June 2021, the Company received notice of forgiveness from the Small Business Administration. - 2,001 48,965 46,160 Less: Origination fees 389 372 48,576 45,788 Less: Current maturities 5,165 5,972 $ 43,411 $ 39,816 Maturities of long-term debt are as follows: Year Ending April 30 Amount 2023 $ 5,242 2024 4,874 2025 5,047 2026 5,228 2027 3,790 Thereafter 24,784 $ 48,965 Financial and Other Covenants We are in compliance with our covenants at April 30, 2022

Note 5 - Lease Right-to-use

Note 5 - Lease Right-to-use	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Lessee, Finance Leases [Text Block]	5. LEASE RIGHT-TO-USE: On May 1, 2019, 2016 02 842. 2016 02 We lease the casino as well as hangar and office space with initial lease terms of two five fifty April 30, 2022 April 30, 2021 Finance lease right-of-use assets $ 3,240 $ 3,099 Less accumulated depreciation 512 436 Total $ 2,728 $ 2,663 Future minimum lease payments for assets under capital leases at April 30, 2022 2023 $ 259 2024 263 2025 139 2026 116 2027 118 Thereafter 7,721 Total minimum lease payments 8,616 Less amount representing interest 5,611 Present value of net minimum lease payments 3,005 Less current maturities of finance lease liability 106 Finance lease liability, net of current maturities $ 2,899 April 30, 2022 April 30, 2021 Finance lease cost: Amortization of right-of-use assets $ 181 $ 225 Interest on lease liabilities 148 158 Total finance lease cost $ 329 $ 383 April 30, 2022 April 30, 2021 Weighted average remaining lease term - Financing leases 45 years 44 years Weighted average discount rate - Financing leases 5 % 5 %

Note 6 - Purchase of Noncontrol

Note 6 - Purchase of Noncontrolling Interest	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Business Combination Disclosure [Text Block]	6. PURCHASE OF NONCONTROLLING INTEREST: On October 18, 2021, 100% The closing was effected pursuant to a Sale and Purchase Agreement for Preferred Member Interest Units between Seller and BNSC (“Purchase Agreement”). BNSC and Seller agreed to utilize an effective date for the Transaction of August 1, 2021. The Transaction purchase price was paid by a combination of available cash and an $8.0 million borrowing on a commercial loan with Academy Bank, N.A. (“Academy Bank”). BHCMC executed a Loan Modification Agreement with Academy, dated October 18, 2021 ( December 22, 2020 2020 April 30, 2022, five October 18, 2026. The following table summarizes the purchase price and accounting of the transaction: Purchase Price Summary: Secured notes payable, net of financing costs $ 7,914 Forgiven note receivable from seller 780 Cash paid 7,659 Total $ 16,353 Accounting Summary: Capital contributed in excess of par $ 6,119 Book basis of the noncontrolling interest in BHCMC, LLC 7,890 Deferred tax asset related to step up in basis 2,344 Total $ 16,353

Note 7 - Boot Hill Casino Build

Note 7 - Boot Hill Casino Building and Land Purchase	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Casino Building and Land Purchase [Text Block]	7. Boot Hill Casino Building and Land Purchase : On December 19, 2020, 842, May 1, 2019. 805 50, 842 20 40 2, Purchase price of casino building and related land $ 41,250 Note payable, collaterialized by all of BHCMC's assets and compensation due under the State Management Contract. The interest rate is 5.32%. This note matures in December 2027, with a balloon payment of $19,250. $ 35,000 Note payable, collaterialized by all of BHCMC's assets and compensation due under the State Management Contract. This loan has subsequently been amended as part of the purchase of noncotrolling interest (See Footnote 6). $ 7,000 Total $ 42,000 Lease right-to-use asset $ 41,250 Accumulated depreciation $ (4,169 ) Net $ 37,081 Lease liability $ 39,709

Note 8 - Income Taxes

Note 8 - Income Taxes	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Income Tax Disclosure [Text Block]	8. INCOME TAXES: Deferred taxes are determined based on the estimated future tax effects of differences between the financial statements and tax basis of assets and liabilities given the provision of the enacted tax laws. Significant components of the Company's deferred tax liabilities and assets as of April 30, 2022 2021 April 30, 2022 April 30, 2021 Deferred tax liabilities: Depreciation and amortization $ - $ (643 ) Deferred compensation, restricted stock (358 ) (521 ) Total deferred tax liabilities (358 ) (1,164 ) Deferred tax assets: Depreciation and amortization $ 1,365 $ - Accounts receivable allowance 55 39 Inventory and other allowances 65 187 Lease right-to-use 472 451 Vacation accruals 60 37 Jackpot reserves 111 50 Total deferred tax assets 2,128 764 Less valuation allowance - - Net deferred tax asset (liability) $ 1,770 $ (400 ) The reconciliation of the federal statutory income tax rate to the effective tax rate is as follows: April 30, 2022 April 30, 2021 Statutory federal income tax rate expense, net of noncontrolling interest 21.00 % 21.00 % State income tax, net of federal benefits 5.38 % 5.59 % Permanent tax -1.12 % 5.36 % Other -1.25 % -15.00 % 24.01 % 16.95 % Income tax expense: Deferred income tax (benefit) $ 174 $ (225 ) Current income tax 3,102 536 Total income tax expense $ 3,276 $ 311 Current income tax expense of $3,102 and $536 are comprised of $2,279 and $328 in federal income tax and $823 and $208 in state income tax for the years ended April 30, 2022 2021 The Company believes that its income tax filing positions and deductions will be sustained on audit and does not The Company files income tax returns in the U.S. Federal jurisdiction and various state jurisdictions. The Company is no May 1, 2018 no

Note 9 - Stockholders' Equity

Note 9 - Stockholders' Equity	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	9. STOCKHOLDERS' EQUITY: Common Stock Transactions During the year ended April 30, 2022 401 During the year ended April 30, 2021 401

Note 10 - Stock Options and Inc

Note 10 - Stock Options and Incentive Plans	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Share-Based Payment Arrangement [Text Block]	10. STOCK OPTIONS AND INCENTIVE PLANS In November 2016, 2016 may On April 12, 2019, April 11, 2024. March 17, 2020, March 16, 2025. five No April 30, 2022, April 30, 2021, April 30, 2022, not For the year ended April 30, 2022 2021 Number of Shares Weighted Average Grant Date Fair Value Outstanding at April 30, 2020 7,500,000 $ 0.40 Forfeited during the year ended April 30, 2021 (50,000 ) $ 0.40 Forfeited during the year ended April 30, 2022 (50,000 ) $ 0.40 Total 7,400,000 $ 0.40

Note 11 - Stock Repurchase Prog

Note 11 - Stock Repurchase Program	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Treasury Stock [Text Block]	11. STOCK REPURCHASE PROGRAM: The Board of Directors approved a stock purchase program authorizing the repurchase of up to $4,000 of its common stock. The timing and amount of any share repurchases will be determined by Butler National’s management based on market conditions and other factors. The program is currently authorized through May 1, 2023. The table below provides information with respect to common stock purchases by the Company during the year ended April 30, 2022 Period Total Number of Shares Purchased Average Price Paid per Share Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs Approximate Dollar Value of Shares That May Yet Be Purchased Under the Plans or Programs Program authorization $ 4,000 Shares purchased in prior periods 2,721,415 $ 0.36 2,721,415 $ 3,019 Quarter ended July 31, 2020 (a) 212,000 $ 0.51 212,000 $ 2,911 Quarter ended October 31, 2020 (a) 152,915 $ 0.50 152,915 $ 2,835 Quarter ended January 31, 2021 (a) - $ - - $ 2,835 Quarter ended April 30, 2021 (a) 17,303 $ 0.65 17,303 $ 2,823 Quarter ended July 31, 2021 (a) - $ - - $ 2,823 Quarter ended October 31, 2021 (a) 6,290 $ 0.62 6,290 $ 2,819 Quarter ended January 31, 2022 (a) - $ - - $ 2,819 Quarter ended April 30, 2022 (a) 180,503 $ 0.91 180,503 $ 2,655 Total 3,290,426 $ 0.41 3,290,426 (a) These shares of common stock purchased were purchased through private transactions

Note 12 - Commitments and Conti

Note 12 - Commitments and Contingencies	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	12. COMMITMENTS AND CONTINGENCIES Litigation: From time to time we may not not July 15, 2022, not

Note 13 - Related-party Transac

Note 13 - Related-party Transactions	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	13. RELATED-PARTY TRANSACTIONS: The Company paid consulting fees of $135 and $135 to David Hayden, a director of Butler National Corporation in fiscal year ended April 30, 2022 2021 The Company paid Edgar Law Firm, LLC, owned by John M. Edgar, a director of Butler National Corporation $214 and $129 in fiscal year ended April 30, 2022 2021 Included in accrued liabilities are $482 and $659 as of April 30, 2022 2021 In fiscal 2022 three $292, $484 and $247 2022 $353, $503 and $255 2021 The policies and procedures for payment of goods and services for related transactions follow our normal course of business standards and require the necessary review and approval process as outlined in our Policies and Procedures manual and as set forth by our Compensation Committee.

Note 14 - 401(k) Profit Sharing

Note 14 - 401(k) Profit Sharing Plan	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Retirement Benefits [Text Block]	14. 401 PROFIT SHARING PLAN: We have a defined contribution plan authorized under Section 401 thirty two may 2022 2021

Note 15 - Segment Reporting and

Note 15 - Segment Reporting and Sales by Major Customer	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	15. SEGMENT REPORTING AND SALES BY MAJOR CUSTOMER: Industry Segmentation Current Activities - Aerospace Products: Aircraft Modifications principally includes the modification of customer and company owned business-size aircraft from passenger to freighter configuration, radar systems, addition of aerial photography capabilities, ISR modifications, and stability enhancing modifications for Learjet, Beechcraft, Cessna, and Dassault Falcon aircraft along with other specialized modifications. We provide these services through our subsidiary, Avcon Industries, Inc. ("Aircraft Modifications" or "Avcon"). Special mission electronics principally includes the manufacture, sale, and service of electronics upgrades for classic weapon control systems used on military aircraft and vehicles. We provide the products through our subsidiary, Butler National Corporation - Tempe, Arizona. Butler Avionics sells, installs and repairs aircraft avionics equipment (airplane radio equipment and flight control systems). These systems are flight display systems which include intuitive touchscreen controls with large display to give users unprecedented access to high-resolution terrain mapping, graphical flight planning, geo-referenced charting, traffic display, satellite weather and much more. Butler Avionics is also recognized nationwide for its troubleshooting and repair work particularly on autopilot systems. Professional Services: Butler National Service Corporation ("BNSC") provides management services to the Boot Hill Casino, a "state-owned casino". BCS Design, Inc. provides licensed architectural services. These services include commercial and industrial building design. Year Ended April 30, 2022 Gaming Aircraft Modification Aircraft Avionics Special Mission Electronics Other Total Revenues from customers $ 38,769 $ 21,399 $ 2,373 $ 10,554 $ 378 $ 73,473 Interest expense 2,440 215 - 23 11 2,689 Depreciation and amortization 2,283 181 5 161 185 2,815 Year Ended April 30, 2021 Gaming Aircraft Modification Aircraft Avionics Special Mission Electronics Other Total Revenues from customers $ 29,951 $ 21,750 $ 2,583 $ 6,942 $ 254 $ 61,480 Interest expense 2,847 251 - 27 13 3,138 Depreciation and amortization 3,060 191 7 135 149 3,542 Our Chief Operating Decision Maker (CODM) does not Major Customers: 10 2022 2021 Aerospace Products – two customers in 2022, one customer in 2021 25.0 % 10.6 % Professional Services - - In fiscal 2022 four April 30, 2022 one

Note 16 - Subsequent Events

Note 16 - Subsequent Events	12 Months Ended
	Apr. 30, 2022
Notes to Financial Statements
Subsequent Events [Text Block]	16 . SUBSEQUENT EVENTS In June 2022, 2016 three 10 The Company evaluated its April 30, 2022 July 15, 2022, not

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Apr. 30, 2022
Accounting Policies [Abstract]
Accounts Receivable [Policy Text Block]	a) Accounts receivable: Accounts receivable are carried on a gross basis, with no not no
Use of Estimates, Policy [Policy Text Block]	b) Use of Estimates: The preparation of financial statements in conformity with generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Future events and their effects cannot be determined with certainty. Therefore, the determination of estimates requires the exercise of judgment. Actual results could differ from those estimates, and any such differences may
Inventory, Policy [Policy Text Block]	c) Inventories: Inventories are priced at the lower of cost, determined on a first first Inventory obsolescence is examined on a regular basis. When determining our estimate of obsolescence, we consider inventory that has been inactive for five April 30, 2022 2021
Property, Plant and Equipment, Policy [Policy Text Block]	d) Property and Related Depreciation: Machinery and equipment are recorded at cost and depreciated over their estimated useful lives. Depreciation is provided on a straight-line basis. The lives used for the significant items within each property classification range from 3 to 39 years. Maintenance and repairs are charged to expense as incurred. The cost and accumulated depreciation of assets retired are removed from the accounts and any resulting gains or losses are reflected as income or expense.
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	e) Long-Lived Assets: The Company accounts for its long-lived assets in accordance with ASC Topic 360 10, 360 10 may no
Other Assets Policy [Policy Text Block]	f) Other Assets: Our other asset account includes assets of $5,500 related to the Kansas Expanded Lottery Act Management Contract privilege fee, $6,151 of gaming equipment we were required to pay for ownership by the State of Kansas Lottery, and JET autopilot intellectual property of $1,417, and miscellaneous other assets of $128. BHCMC expects the $5,500 December 2024. December 15, 2024, 2039, 15 three fifteen April 30, 2022 2021 Other assets net values are as follows: (dollars in thousands) 2022 2021 Privilege fee $ 5,500 $ 5,500 Less amortized costs 4,372 3,949 Privilege fee balance $ 1,128 $ 1,551 Intangible gaming equipment $ 6,151 $ 5,927 Less amortized costs 5,868 5,696 Intangible gaming equipment balance $ 283 $ 231 JET autopilot intellectual property $ 1,417 $ 1,417 Less amortized costs 1,335 1,241 JET autopilot intellectual property balance $ 82 $ 176
Supplemental Type Certificates [Policy Text Block]	g) Supplemental Type Certificates: Supplemental Type Certificates (STCs) are authorizations granted by the Federal Aviation Administration (FAA) for specific modification of a certain aircraft. The STC authorizes us to perform modifications, installations, and assemblies on applicable customer-owned aircraft. Costs incurred to obtain STCs are capitalized and subsequently amortized over seven April 30, 2022 2021 (dollars in thousands) 2022 2021 Direct labor $ 3,342 $ 3,387 Direct materials 5,227 4,108 Consultant costs 3,083 2,983 Overhead 5,702 5,774 17,354 16,252 Less-amortized costs 9,336 8,041 STC balance $ 8,018 $ 8,211
Revenue from Contract with Customer [Policy Text Block]	h) Revenue Recognition: ASC Topic 606, Under ASC 606, five 1 A contract with a customer exists when (i) the Company enters into an enforceable contract with a customer that defines each party’s rights regarding the services to be transferred and identifies the payment terms related to these services, (ii) the contract has commercial substance and (iii) the Company determines that collection of substantially all consideration for services that are transferred is probable based on the customer’s intent and ability to pay the promised consideration. 2 At contract inception, an entity shall assess the goods or services promised in a contract with a customer and shall identify as a performance obligation each promise to transfer to the customer. Performance obligations promised in a contract are identified based on the services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the service either on its own or together with other resources that are readily available from third not 3 The transaction price is the amount that an entity allocates to the performance obligations identified in the contract and, therefore, represents the amount of revenue recognized as those performance obligations are satisfied. The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer. 4 Once a contract and associated performance obligations have been identified and the transaction price has been determined, ASC 606 5 Revenue is recognized when or as performance obligations are satisfied by transferring control of a promised good or service to a customer. Control transfers either over time or at a point in time. Revenue is recognized when control of the promised services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those services. Aircraft modifications are performed under fixed-price contracts. Revenue from fixed-priced contracts are recognized on the percentage-of-completion method, measured by the direct labor incurred compared to total estimated direct labor. Using direct labor best represents the progress on a contract. Revenue from Avionics products are recognized when shipped. Payment for these Avionics products is due within 30 days of the invoice date after shipment. Revenue from Gaming Management and other Corporate/Professional Services is recognized as the service is rendered. Regarding warranties and returns, our products are special order and are not may not Gaming revenue is the gross gaming win as reported by the Kansas Lottery casino reporting systems, less the mandated payments by and for the State of Kansas. Electronic games-slots and table games revenue is the aggregate of gaming wins and losses. Liabilities are recognized for chips and "ticket-in, ticket-out" coupons in the customers' possession, and for accruals related to anticipated payout of progressive jackpots. Progressive gaming machines, which contain base jackpots that increase at a progressive rate based on the number of coins played, are deducted from revenue as the value of jackpots increase. Food, beverage, and other revenue is recorded when the service is received and paid.
Fair Value Measurement, Policy [Policy Text Block]	i) Fair Value Measurements: Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability. Assets and liabilities recorded at fair value are measured and classified in accordance with a three Level 1 Level 2 not Level 3 no The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. For certain financial instruments, including cash and cash equivalents, short-term investments, accounts receivable, marketable securities, notes payable, and accounts payable, the carrying amounts approximate fair value. We do not We measure certain other instruments, including stock-based compensation awards settled in the stock also at fair value. The determination of fair value involves the use of appropriate valuation methods and relevant inputs into valuation models.
Slot Machine Jackpots [Policy Text Block]	j) Slot Machine Jackpots: If the casino is not No
Gaming Facility Mandated Payment [Policy Text Block]	k) Gaming Facility Mandated Payment: Boothill Casino is contractually obligated to pay its proportionate share of certain expenses incurred by the Kansas Lottery Commission and the Kansas Racing and Gaming Commission, which amounted to $1,968 and $1,868 in the fiscal year ended April 30, 2022 2021
Advanced Payments and Billings in Excess of Costs Incurred [Policy Text Block]	l) Advanced Payments and Billings in Excess of Costs Incurred: We receive advances, performance-based payments and progress payment from customers which may
Earnings Per Share, Policy [Policy Text Block]	m) Earnings Per Share: Earnings per common share is based on the weighted average number of common shares outstanding during the year. The computation of the Company basic and diluted earnings per common share is as follows: (in thousands, except share and per share data) 2022 2021 Net income attributable to Butler National Corporation $ 10,368 $ 1,433 Weighted average common shares outstanding 75,340,131 74,144,957 Dilutive effect of non-qualified stock option plans - - Weighted average common shares outstanding, assuming dilution 75,340,131 74,144,957 Potential common shares if all options were exercised and shares issued 75,340,131 74,144,957 Basic earnings per common share $ 0.14 $ 0.02 Diluted earnings per common share $ 0.14 $ 0.02
Share-Based Payment Arrangement [Policy Text Block]	n) Stock-based Compensation: The Company accounts for stock-based compensation under ASC 718, Accounting for Stock-Based Compensation
Income Tax, Policy [Policy Text Block]	o) Income Taxes: The Company utilizes ASC 740, not
Cash and Cash Equivalents, Policy [Policy Text Block]	p) Cash and Cash Equivalents: Cash and cash equivalents consist primarily of cash and investments in a money market fund. We consider all highly liquid investments with an original maturity of three may April 30, 2022 2021
Concentration Risk, Credit Risk, Policy [Policy Text Block]	q) Concentration of Credit Risk: We extend credit to customers based on an evaluation of their financial condition and collateral is not
Research and Development Expense, Policy [Policy Text Block]	r) Research and Development: We invested in research and development activities. The amount invested in the year ended April 30, 2022 2021
Reclassification, Comparability Adjustment [Policy Text Block]	s) Reclassifications: Certain reclassifications within the financial statement captions have been made to maintain consistency in presentation between years. These reclassifications have no

Note 1 - Nature of Operations_2

Note 1 - Nature of Operations, Organization and Significant Accounting Policies (Tables)	12 Months Ended
	Apr. 30, 2022
Notes Tables
Schedule of Other Assets [Table Text Block]	(dollars in thousands) 2022 2021 Privilege fee $ 5,500 $ 5,500 Less amortized costs 4,372 3,949 Privilege fee balance $ 1,128 $ 1,551 Intangible gaming equipment $ 6,151 $ 5,927 Less amortized costs 5,868 5,696 Intangible gaming equipment balance $ 283 $ 231 JET autopilot intellectual property $ 1,417 $ 1,417 Less amortized costs 1,335 1,241 JET autopilot intellectual property balance $ 82 $ 176
Supplemental Type Certificates Capitalized Costs [Table Text Block]	(dollars in thousands) 2022 2021 Direct labor $ 3,342 $ 3,387 Direct materials 5,227 4,108 Consultant costs 3,083 2,983 Overhead 5,702 5,774 17,354 16,252 Less-amortized costs 9,336 8,041 STC balance $ 8,018 $ 8,211
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	(in thousands, except share and per share data) 2022 2021 Net income attributable to Butler National Corporation $ 10,368 $ 1,433 Weighted average common shares outstanding 75,340,131 74,144,957 Dilutive effect of non-qualified stock option plans - - Weighted average common shares outstanding, assuming dilution 75,340,131 74,144,957 Potential common shares if all options were exercised and shares issued 75,340,131 74,144,957 Basic earnings per common share $ 0.14 $ 0.02 Diluted earnings per common share $ 0.14 $ 0.02

Note 2 - Disaggregation of Re_2

Note 2 - Disaggregation of Revenue (Tables)	12 Months Ended
	Apr. 30, 2022
Notes Tables
Disaggregation of Revenue [Table Text Block]	Year Ended April 30, 2022 Professional Services Aerospace Products Total Geographical Markets North America $ 39,147 $ 29,258 $ 68,405 Europe - 2,803 2,803 Asia - 1,228 1,228 Australia and Other - 1,037 1,037 $ 39,147 $ 34,326 $ 73,473 Major Product Lines Casino Gaming Revenues $ 34,411 $ - $ 34,411 Casino Non-Gaming Revenues 4,358 - 4,358 Professional Services 378 - 378 Aircraft Modification - 21,399 21,399 Aircraft Avionics - 2,373 2,373 Special Mission Electronics - 10,554 10,554 $ 39,147 $ 34,326 $ 73,473 Contract Types / Revenue Recognition Timing Percentage of completion contracts $ - $ 19,507 $ 19,507 Goods or services transferred at a point of sale 39,147 14,819 53,966 $ 39,147 $ 34,326 $ 73,473 Year Ended April 30, 2021 Professional Services Aerospace Products Total Geographical Markets North America $ 30,205 $ 25,537 $ 55,742 Europe - 3,427 3,427 Asia - 1,332 1,332 Australia and Other - 979 979 $ 30,205 $ 31,275 $ 61,480 Major Product Lines Casino Gaming Revenues $ 26,811 $ - $ 26,811 Casino Non-Gaming Revenues 3,140 - 3,140 Professional Services 254 - 254 Aircraft Modification - 21,750 21,750 Aircraft Avionics - 2,583 2,583 Special Mission Electronics - 6,942 6,942 $ 30,205 $ 31,275 $ 61,480 Contract Types / Revenue Recognition Timing Percentage of completion contracts $ - $ 19,280 $ 19,280 Goods or services transferred at a point of sale 30,205 11,995 42,200 $ 30,205 $ 31,275 $ 61,480

Note 3 - Accounts Receivable,_2

Note 3 - Accounts Receivable, Net, Contract Asset and Contract Liability (Tables)	12 Months Ended
	Apr. 30, 2022
Notes Tables
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]	2022 2021 Accounts Receivable, net $ 3,636 $ 1,961 Contract Asset 1,470 421 Contract Liability 820 5,798

Note 4 - Debt (Tables)

Note 4 - Debt (Tables)	12 Months Ended
	Apr. 30, 2022
Notes Tables
Schedule of Debt [Table Text Block]	Promissory Notes 2022 2021 Bank line of credit, available LOC $2.0 million interest at 3.65% due on demand, collateralized by a first and second position on all assets of the Company. - - $ - $ - Long-Term Debt Note payable, interest at 6.25% due January 2023, collateralized by an Aircraft Security Agreement. 534 1,138 Note payable, interest at 6.25%, due June 2024, collateralized by real estate. 181 202 Note payable, interest at 4.5%, paid off in 2022. - 21 Note payable, interest at SOFR plus 1.75% due March 2029, collateralized by real estate. 1,106 1,267 Note payable, interest at SOFR plus 1.75% due March 2029 collateralized by real estate. 507 581 Note payable, interest at 5.32%, this note matures in December 2027, with a balloon payment of $19,250, collateralized by all of BHCMC's assets and compensation due under the State Management Contract. 32,667 34,417 Note payable, interest at 5.75%, this note matures October 2026, collateralized by all of BHCMC's assets and compensation due under the State Management Contract. 12,721 6,533 Note payable, interest at 4.35%, due March 2029, collateralized by Aircraft Security Agreements 1,197 - Note payable, interest at 8.13%, due October 2025, collateralized by equipment 52 - Paycheck Protection Program loan, interest at 1%, this loan was received for the professional services segment. In June 2021, the Company received notice of forgiveness from the Small Business Administration. - 2,001 48,965 46,160 Less: Origination fees 389 372 48,576 45,788 Less: Current maturities 5,165 5,972 $ 43,411 $ 39,816
Schedule of Maturities of Long-Term Debt [Table Text Block]	Year Ending April 30 Amount 2023 $ 5,242 2024 4,874 2025 5,047 2026 5,228 2027 3,790 Thereafter 24,784 $ 48,965

Note 5 - Lease Right-to-use (Ta

Note 5 - Lease Right-to-use (Tables)	12 Months Ended
	Apr. 30, 2022
Notes Tables
Lessee, Finance Lease, Right of Use Assets [Table Text Block]	April 30, 2022 April 30, 2021 Finance lease right-of-use assets $ 3,240 $ 3,099 Less accumulated depreciation 512 436 Total $ 2,728 $ 2,663
Finance Lease, Liability, Fiscal Year Maturity [Table Text Block]	2023 $ 259 2024 263 2025 139 2026 116 2027 118 Thereafter 7,721 Total minimum lease payments 8,616 Less amount representing interest 5,611 Present value of net minimum lease payments 3,005 Less current maturities of finance lease liability 106 Finance lease liability, net of current maturities $ 2,899
Lease, Cost [Table Text Block]	April 30, 2022 April 30, 2021 Finance lease cost: Amortization of right-of-use assets $ 181 $ 225 Interest on lease liabilities 148 158 Total finance lease cost $ 329 $ 383 April 30, 2022 April 30, 2021 Weighted average remaining lease term - Financing leases 45 years 44 years Weighted average discount rate - Financing leases 5 % 5 %

Note 6 - Purchase of Noncontr_2

Note 6 - Purchase of Noncontrolling Interest (Tables)	12 Months Ended
	Apr. 30, 2022
Notes Tables
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	Purchase Price Summary: Secured notes payable, net of financing costs $ 7,914 Forgiven note receivable from seller 780 Cash paid 7,659 Total $ 16,353 Accounting Summary: Capital contributed in excess of par $ 6,119 Book basis of the noncontrolling interest in BHCMC, LLC 7,890 Deferred tax asset related to step up in basis 2,344 Total $ 16,353

Note 7 - Boot Hill Casino Bui_2

Note 7 - Boot Hill Casino Building and Land Purchase (Tables)	12 Months Ended
	Apr. 30, 2022
Notes Tables
Casino Building and Land Purchase Price and Lease Allocation [Table Text Block]	Purchase price of casino building and related land $ 41,250 Note payable, collaterialized by all of BHCMC's assets and compensation due under the State Management Contract. The interest rate is 5.32%. This note matures in December 2027, with a balloon payment of $19,250. $ 35,000 Note payable, collaterialized by all of BHCMC's assets and compensation due under the State Management Contract. This loan has subsequently been amended as part of the purchase of noncotrolling interest (See Footnote 6). $ 7,000 Total $ 42,000 Lease right-to-use asset $ 41,250 Accumulated depreciation $ (4,169 ) Net $ 37,081 Lease liability $ 39,709

Note 8 - Income Taxes (Tables)

Note 8 - Income Taxes (Tables)	12 Months Ended
	Apr. 30, 2022
Notes Tables
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	April 30, 2022 April 30, 2021 Deferred tax liabilities: Depreciation and amortization $ - $ (643 ) Deferred compensation, restricted stock (358 ) (521 ) Total deferred tax liabilities (358 ) (1,164 ) Deferred tax assets: Depreciation and amortization $ 1,365 $ - Accounts receivable allowance 55 39 Inventory and other allowances 65 187 Lease right-to-use 472 451 Vacation accruals 60 37 Jackpot reserves 111 50 Total deferred tax assets 2,128 764 Less valuation allowance - - Net deferred tax asset (liability) $ 1,770 $ (400 )
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	April 30, 2022 April 30, 2021 Statutory federal income tax rate expense, net of noncontrolling interest 21.00 % 21.00 % State income tax, net of federal benefits 5.38 % 5.59 % Permanent tax -1.12 % 5.36 % Other -1.25 % -15.00 % 24.01 % 16.95 % Income tax expense: Deferred income tax (benefit) $ 174 $ (225 ) Current income tax 3,102 536 Total income tax expense $ 3,276 $ 311

Note 10 - Stock Options and I_2

Note 10 - Stock Options and Incentive Plans (Tables)	12 Months Ended
	Apr. 30, 2022
Notes Tables
Share-Based Payment Arrangement, Option, Activity [Table Text Block]	Number of Shares Weighted Average Grant Date Fair Value Outstanding at April 30, 2020 7,500,000 $ 0.40 Forfeited during the year ended April 30, 2021 (50,000 ) $ 0.40 Forfeited during the year ended April 30, 2022 (50,000 ) $ 0.40 Total 7,400,000 $ 0.40

Note 11 - Stock Repurchase Pr_2

Note 11 - Stock Repurchase Program (Tables)	12 Months Ended
	Apr. 30, 2022
Notes Tables
Class of Treasury Stock [Table Text Block]	Period Total Number of Shares Purchased Average Price Paid per Share Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs Approximate Dollar Value of Shares That May Yet Be Purchased Under the Plans or Programs Program authorization $ 4,000 Shares purchased in prior periods 2,721,415 $ 0.36 2,721,415 $ 3,019 Quarter ended July 31, 2020 (a) 212,000 $ 0.51 212,000 $ 2,911 Quarter ended October 31, 2020 (a) 152,915 $ 0.50 152,915 $ 2,835 Quarter ended January 31, 2021 (a) - $ - - $ 2,835 Quarter ended April 30, 2021 (a) 17,303 $ 0.65 17,303 $ 2,823 Quarter ended July 31, 2021 (a) - $ - - $ 2,823 Quarter ended October 31, 2021 (a) 6,290 $ 0.62 6,290 $ 2,819 Quarter ended January 31, 2022 (a) - $ - - $ 2,819 Quarter ended April 30, 2022 (a) 180,503 $ 0.91 180,503 $ 2,655 Total 3,290,426 $ 0.41 3,290,426

Note 15 - Segment Reporting a_2

Note 15 - Segment Reporting and Sales by Major Customer (Tables)	12 Months Ended
	Apr. 30, 2022
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Year Ended April 30, 2022 Gaming Aircraft Modification Aircraft Avionics Special Mission Electronics Other Total Revenues from customers $ 38,769 $ 21,399 $ 2,373 $ 10,554 $ 378 $ 73,473 Interest expense 2,440 215 - 23 11 2,689 Depreciation and amortization 2,283 181 5 161 185 2,815 Year Ended April 30, 2021 Gaming Aircraft Modification Aircraft Avionics Special Mission Electronics Other Total Revenues from customers $ 29,951 $ 21,750 $ 2,583 $ 6,942 $ 254 $ 61,480 Interest expense 2,847 251 - 27 13 3,138 Depreciation and amortization 3,060 191 7 135 149 3,542
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]	2022 2021 Aerospace Products – two customers in 2022, one customer in 2021 25.0 % 10.6 % Professional Services - -

Note 1 - Nature of Operations_3

Note 1 - Nature of Operations, Organization and Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended		24 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022
Duration after Which Invoices Are Considered to Be Doubtful (Day)			90 days
Duration During Which Inventory If Inactive Taken as Obsolete (Year)			5 years
Inventory Valuation Reserves	$ 240	$ 691	$ 240
Period for Payment Due (Day)			30 days
Cash, Uninsured Amount	7,835	16,883	$ 7,835
Research and Development Expense, Total	2,352	3,493
Kansas Lottery Commission and the Kansas Racing and Gaming Commission [Member]
Accrued Liabilities, Total	1,968	1,868	1,968
Kansas Expanded Lottery Act Management Contract Privilege Fee [Member]
Finite-Lived Intangible Assets, Gross, Total	5,500	5,500	5,500
Gaming Equipment [Member]
Finite-Lived Intangible Assets, Gross, Total	6,151	5,927	$ 6,151
Finite-Lived Intangible Asset, Useful Life (Year)			3 years
JET Autopilot Intellectual Property [Member]
Finite-Lived Intangible Assets, Gross, Total	1,417	1,417	$ 1,417
Finite-Lived Intangible Asset, Useful Life (Year)			15 years
Other Miscellaneous Long-Term Assets [Member]
Finite-Lived Intangible Assets, Gross, Total	128		$ 128
Amortization of Intangible Assets	689	733
Supplemental Type Certificates [Member]
Finite-Lived Intangible Asset, Useful Life (Year)			7 years
Amortization of Intangible Assets	$ 1,295	$ 1,012
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)			3 years
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)			39 years

Note 1 - Nature of Operations_4

Note 1 - Nature of Operations, Organization and Significant Accounting Policies - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Kansas Expanded Lottery Act Management Contract Privilege Fee [Member]
Other assets intangible	$ 5,500	$ 5,500
Less amortized costs	4,372	3,949
Other assets net intangible, net	1,128	1,551
Gaming Equipment [Member]
Other assets intangible	6,151	5,927
Less amortized costs	5,868	5,696
Other assets net intangible, net	283	231
JET Autopilot Intellectual Property [Member]
Other assets intangible	1,417	1,417
Less amortized costs	1,335	1,241
Other assets net intangible, net	$ 82	$ 176

Note 1 - Nature of Operations_5

Note 1 - Nature of Operations, Organization and Significant Accounting Policies - Supplemental Type Certificates Capitalized Costs (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Direct labor	$ 3,342	$ 3,387
Direct materials	5,227	4,108
Consultant costs	3,083	2,983
Overhead	5,702	5,774
Supplemental Type Certificates, Capitalized Gross	17,354	16,252
Supplemental type certificates, accumulated amortization	9,336	8,041
STC balance	$ 8,018	$ 8,211

Note 1 - Nature of Operations_6

Note 1 - Nature of Operations, Organization and Significant Accounting Policies - Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Net income attributable to Butler National Corporation	$ 10,368	$ 1,433
Weighted average common shares outstanding (in shares)	75,340,131	74,144,957
Dilutive effect of non-qualified stock option plans (in shares)	0	0
Weighted average common shares outstanding, assuming dilution (in shares)	75,340,131	74,144,957
Potential common shares if all options were exercised and shares issued (in shares)	75,340,131	74,144,957
Basic earnings per common share (in dollars per share)	$ 0.14	$ 0.02
Diluted earnings per common share (in dollars per share)	$ 0.14	$ 0.02

Note 2 - Disaggregation of Re_3

Note 2 - Disaggregation of Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Revenues	$ 73,473	$ 61,480
Percentage of Completion Contracts [Member]
Revenues	19,507	19,280
Transferred at Point in Time [Member]
Revenues	53,966	42,200
Casino [Member]
Revenues	34,411	26,811
Casino Non-gaming [Member]
Revenues	4,358	3,140
Professional Services [Member]
Revenues	378	254
Aircraft Modification [Member]
Revenues	21,399	21,750
Aircraft Avionics [Member]
Revenues	2,373	2,583
Special Mission Electronics [Member]
Revenues	10,554	6,942
Professional Services [Member]
Revenues	39,147	30,205
Professional Services [Member] | Percentage of Completion Contracts [Member]
Revenues	0	0
Professional Services [Member] | Transferred at Point in Time [Member]
Revenues	39,147	30,205
Professional Services [Member] | Casino [Member]
Revenues	34,411	26,811
Professional Services [Member] | Casino Non-gaming [Member]
Revenues	4,358	3,140
Professional Services [Member] | Professional Services [Member]
Revenues	378	254
Professional Services [Member] | Aircraft Modification [Member]
Revenues	0	0
Professional Services [Member] | Aircraft Avionics [Member]
Revenues	0	0
Professional Services [Member] | Special Mission Electronics [Member]
Revenues	0	0
Aerospace Products [Member]
Revenues	34,326	31,275
Aerospace Products [Member] | Percentage of Completion Contracts [Member]
Revenues	19,507	19,280
Aerospace Products [Member] | Transferred at Point in Time [Member]
Revenues	14,819	11,995
Aerospace Products [Member] | Casino [Member]
Revenues	0	0
Aerospace Products [Member] | Casino Non-gaming [Member]
Revenues	0	0
Aerospace Products [Member] | Professional Services [Member]
Revenues	0	0
Aerospace Products [Member] | Aircraft Modification [Member]
Revenues	21,399	21,750
Aerospace Products [Member] | Aircraft Avionics [Member]
Revenues	2,373	2,583
Aerospace Products [Member] | Special Mission Electronics [Member]
Revenues	10,554	6,942
North America [Member]
Revenues	68,405	55,742
North America [Member] | Professional Services [Member]
Revenues	39,147	30,205
North America [Member] | Aerospace Products [Member]
Revenues	29,258	25,537
Europe [Member]
Revenues	2,803	3,427
Europe [Member] | Professional Services [Member]
Revenues	0	0
Europe [Member] | Aerospace Products [Member]
Revenues	2,803	3,427
Asia [Member]
Revenues	1,228	1,332
Asia [Member] | Professional Services [Member]
Revenues	0	0
Asia [Member] | Aerospace Products [Member]
Revenues	1,228	1,332
Australia and Other [Member]
Revenues	1,037	979
Australia and Other [Member] | Professional Services [Member]
Revenues	0	0
Australia and Other [Member] | Aerospace Products [Member]
Revenues	$ 1,037	$ 979

Note 3 - Accounts Receivable,_3

Note 3 - Accounts Receivable, Net, Contract Asset and Contract Liability (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Accounts Receivable, after Allowance for Credit Loss, Total	$ 3,636	$ 1,961
Accounts Receivable, Allowance for Credit Loss, Ending Balance	205	143
Contract with Customer, Asset, after Allowance for Credit Loss, Total	1,470	421
Increase (Decrease) in Contract with Customer, Asset	1,049	226
Increase (Decrease) in Contract with Customer, Liability	(4,978)	3,609
Contract with Customer, Liability, Revenue Recognized	$ 5,798	$ 2,189,000

Note 3 - Accounts Receivable,_4

Note 3 - Accounts Receivable, Net, Contract Asset and Contract Liability - Accounts Receivable, Net, Contract Asset and Contract Liability (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Accounts Receivable, net	$ 3,636	$ 1,961
Contract Asset	1,470	421
Contract Liability	$ 820	$ 5,798

Note 4 - Debt - Schedule of Deb

Note 4 - Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Notes payable	$ 48,965	$ 46,160
Less: Origination fees	389	372
Long-Term Debt, Total	48,576	45,788
Less: Current maturities	5,165	5,972
Long-Term Debt, Excluding Current Maturities, Total	43,411	39,816
Note Collateralized by Real Estate [Member]
Line of Credit, Current	0	0
Long-Term Debt, Excluding Current Maturities, Total	43,411	39,816
Notes Collateralized by Aircraft Security Agreements, Due January 2023 [Member]
Notes payable	534	1,138
Note Collateralized by Real Estate Due June 2024 [Member]
Notes payable	181	202
Note Collateralized by Equipment Due April 2022 [Member] | Note Collateralized by Equipment Due April 2022 [Member]
Notes payable	0
Notes Repaid In 2022 [Member] | Note Collateralized by Equipment Due April 2022 [Member]
Notes payable		21
Note One Collateralized by Real Estate Due March 2029 [Member]
Notes payable	1,106	1,267
Note Two Collateralized by Real Estate Due March 2029 [Member]
Notes payable	507	581
Notes Collateralized by BHCMC's Assets and Compensation Due under State Management Contract Due December 2027 [Member]
Notes payable	32,667	34,417
Note Collateralized By All Of BHCMC's Assets and Compensation due under the State Management Contract Due October 2026 [Member]
Notes payable	12,721	6,533
Notes Collateralized by Aircraft Security Agreements, Due March 2029 [Member]
Notes payable	1,197	0
Note Collateralized by Equipment Due October 2025 [Member]
Notes payable	52	0
Paycheck Protection Program CARES Act [Member] | Professional Services [Member]
Notes payable	$ 0	$ 2,001

Note 4 - Debt - Maturities of L

Note 4 - Debt - Maturities of Long-term Debt (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
2023	$ 5,242
2024	4,874
2025	5,047
2026	5,228
2027	3,790
Thereafter	24,784
Long-Term Debt, Gross	$ 48,965	$ 46,160

Note 5 - Lease Right-to-use (De

Note 5 - Lease Right-to-use (Details Textual)	Apr. 30, 2022
Casino, Hangar, and Office Space, Three [Member]
Lessee, Finance Lease, Term of Contract (Year)	50 years
Casino, Hangar, and Office Space, One [Member]
Lessee, Finance Lease, Term of Contract (Year)	2 years
Casino, Hangar, and Office Space, Two [Member]
Lessee, Finance Lease, Term of Contract (Year)	5 years

Note 5 - Lease Right-to-use - F

Note 5 - Lease Right-to-use - Finance Lease Right-of-use Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021	Dec. 19, 2020
Lease right-to-use asset	$ 3,240	$ 3,099	$ 41,250
Less accumulated depreciation	512	436	4,169
Net	$ 2,728	$ 2,663	$ 37,081

Note 5 - Lease Right-to-use -_2

Note 5 - Lease Right-to-use - Future Minimum Lease Payments (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021	Dec. 19, 2020
2023	$ 259
2024	263
2025	139
2026	116
2027	118
Thereafter	7,721
Total minimum lease payments	8,616
Less amount representing interest	5,611
Present value of net minimum lease payments	3,005		$ 39,709
Less current maturities of finance lease liability	106	$ 107
Finance lease liability, net of current maturities	$ 2,899	$ 2,759

Note 5 - Lease Right-to-use - L

Note 5 - Lease Right-to-use - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Amortization of right-of-use assets	$ 181	$ 225
Interest on lease liabilities	148	158
Total finance lease cost	$ 329	$ 383
Weighted average remaining lease term - Financing leases (Year)	45 years	44 years
Weighted average discount rate - Financing leases	5%	5%

Note 6 - Purchase of Noncontr_3

Note 6 - Purchase of Noncontrolling Interest (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Oct. 18, 2021	Dec. 31, 2020	Apr. 30, 2022	Jan. 31, 2022	Apr. 30, 2021
Long-Term Debt, Total			$ 48,576		$ 45,788
BNSC [Member] | Academy Bank, N.A. [Member] | Manager Loan [Member]
Long-Term Debt, Total			$ 12,700
Debt Instrument, Interest Rate, Stated Percentage	5.75%
BHCMC, LLC [Member] | BNSC [Member]
Business Combination, Step Acquisition, Equity Interest in Acquiree, including Subsequent Acquisition, Percentage, Total				100%
Business Combination, Consideration Transferred, Total	$ 16,400
BHCMC, LLC [Member] | BNSC [Member] | Academy Bank, N.A. [Member] | Manager Loan [Member]
Business Combination, Consideration Transferred, Liabilities Incurred	7,000	$ 35,000
BHCMC, LLC [Member] | BNSC [Member] | Commercial Loan [Member] | Academy Bank, N.A. [Member]
Business Combination, Consideration Transferred, Liabilities Incurred	$ 8,000

Note 6 - Purchase of Noncontr_4

Note 6 - Purchase of Noncontrolling Interest - Purchase Price and Accounting of Transaction (Details) - BHCMC [Member] - BNSC [Member] $ in Thousands	Oct. 18, 2021 USD ($)
Secured notes payable, net of financing costs	$ 7,914
Forgiven note receivable from seller	780
Cash paid	7,659
Business Combination, Consideration Transferred, Total	16,353
Capital contributed in excess of par	6,119
Book basis of the noncontrolling interest in BHCMC, LLC	7,890
Deferred tax asset related to step up in basis	2,344
Total	$ 16,353

Note 7 - Boot Hill Casino Bui_3

Note 7 - Boot Hill Casino Building and Land Purchase (Details Textual) $ in Thousands	Dec. 19, 2020 USD ($)
Payments to Acquire Building and Related Land	$ 41,250
Number of Notes	2
Finance Lease, Adjustment, Carrying Amount of Assets	$ 2,628
Secured Debt [Member]
Notes Payable, Total	42,000
Debt Issuance Costs, Net, Total	$ 400

Note 7 - Boot Hill Casino Bui_4

Note 7 - Boot Hill Casino Building and Land Purchase - Lease liability (Details) - USD ($) $ in Thousands	Dec. 19, 2020	Apr. 30, 2022	Apr. 30, 2021
Purchase price of casino building and related land	$ 41,250
Lease right-to-use asset	41,250	$ 3,240	$ 3,099
Accumulated depreciation	(4,169)	(512)	(436)
Net	37,081	2,728	$ 2,663
Lease liability	39,709	$ 3,005
Notes Collateralized by BHCMC's Assets and Compensation Due under State Management Contract Due December 2027 [Member]
Note, payable	35,000
Notes Collateralized by Bhcmc's Assets and Compensation Due Under State Management Contract Subsequently Amended As Part of Purchase of Noncontrolling Interest [Member]
Note, payable	7,000
Secured Debt [Member]
Note, payable	$ 42,000

Note 8 - Income Taxes (Details

Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Current Income Tax Expense (Benefit), Total	$ 3,102	$ 536
Current Federal Tax Expense (Benefit)	2,279	328
Current State and Local Tax Expense (Benefit)	$ 823	208
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total		$ 0

Note 8 - Income Taxes - Compone

Note 8 - Income Taxes - Components of Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Deferred tax liabilities:
Depreciation and amortization	$ 0	$ (643)
Deferred compensation, restricted stock	(358)	(521)
Total deferred tax liabilities	(358)	(1,164)
Deferred tax assets:
Depreciation and amortization	1,365	0
Accounts receivable allowance	55	39
Inventory and other allowances	65	187
Lease right-to-use	472	451
Vacation accruals	60	37
Jackpot reserves	111	50
Total deferred tax assets	2,128	764
Less valuation allowance	0	0
Net deferred tax asset	$ 1,770
Net deferred tax liability		$ (400)

Note 8 - Income Taxes - Reconci

Note 8 - Income Taxes - Reconciliation of the Federal Statutory Income Tax Rate to the Effective Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Statutory federal income tax rate expense, net of noncontrolling interest	21%	21%
State income tax, net of federal benefits	5.38%	5.59%
Permanent tax	(1.12%)	5.36%
Other	(1.25%)	(15.00%)
Effective Income Tax Rate Reconciliation, Percent, Total	24.01%	16.95%
PROVISION (BENEFIT) FOR INCOME TAXES
Deferred income tax (benefit)	$ 174	$ (225)
Current Income Tax Expense (Benefit), Total	3,102	536
Total income tax expense	$ 3,276	$ 311

Note 9 - Stockholders' Equity (

Note 9 - Stockholders' Equity (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Stock Issued During Period, Shares, Employee Benefit Plan (in shares)	1,328,190	1,400,705
Stock Issued During Period, Value, Employee Benefit Plan	$ 807	$ 721

Note 10 - Stock Options and I_3

Note 10 - Stock Options and Incentive Plans (Details Textual) - USD ($)			12 Months Ended
	Mar. 17, 2020	Apr. 12, 2019	Apr. 30, 2022	Apr. 30, 2021	Nov. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)			50,000	50,000
Share-Based Payment Arrangement, Expense			$ 585,000	$ 592,000
Butler National Corporation 2016 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)					12,500,000
Stock Issued During Period, Value, Restricted Stock Award, Gross	$ 2,000,000	$ 950,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		0
Butler National Corporation 2016 Equity Incentive Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	5,000,000	2,500,000
Share Price (in dollars per share)	$ 0.41	$ 0.38
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		5 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)			50,000	50,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 1,551
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			3 years 6 months

Note 10 - Stock Options and I_4

Note 10 - Stock Options and Incentive Plans - Restricted Stock Options Activity (Details) - $ / shares	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Outstanding, shares (in shares)		7,500,000
Outstanding, weighted average fair value (in dollars per share)		$ 0.40
Forfeited during the year ended April 30, 2021 (in shares)	(50,000)	(50,000)
Forfeited during the year ended April 30, 2021 (in dollars per share)	$ 0.40	$ 0.40
Outstanding, shares (in shares)	7,400,000
Outstanding, weighted average fair value (in dollars per share)	$ 0.40

Note 11 - Stock Repurchase Pr_3

Note 11 - Stock Repurchase Program (Details Textual) $ in Millions	Apr. 30, 2022 USD ($)
Stock Repurchase Program, Authorized Amount	$ 4

Note 11 - Stock Repurchase Pr_4

Note 11 - Stock Repurchase Program - Schedule of Stock Purchases (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												48 Months Ended	72 Months Ended
	Apr. 30, 2022	Oct. 31, 2021	Jul. 31, 2021	[1]	Apr. 30, 2021	[1]	Jan. 31, 2021	[1]	Oct. 31, 2020	[1]	Jul. 31, 2020	[1]	Apr. 30, 2020	Apr. 30, 2022	Jan. 31, 2022	Dec. 31, 2016
Approximate Dollar Value of Shares That May Yet Be Purchased Under the Plan or Programs	$ 2,655	$ 2,819	$ 2,823		$ 2,823		$ 2,835		$ 2,835		$ 2,911		$ 3,019	$ 2,655	$ 2,819	$ 4,000
Number of Shares Purchased (in shares)	180,503	6,290	0		17,303		0		152,915		212,000		2,721,415	3,290,426
Average Price Paid per Share (in dollars per share)	$ 0.91	$ 0.62			$ 0.65		$ 0		$ 0.50		$ 0.51		$ 0.36	$ 0.41
Number of Shares Purchased as Part of Publicly Announced Plans or Programs (in shares)	180,503	6,290	0		17,303		0		152,915		212,000		2,721,415	3,290,426
[1]These shares of common stock were purchased through a private transaction

Note 13 - Related-party Trans_2

Note 13 - Related-party Transactions (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Director David Hayden [Member] | Consulting Fees [Member]
Related Party Transaction, Amounts of Transaction	$ 135	$ 135
Edgar Law Firm LLC [Member]
Related Party Transaction, Amounts of Transaction	214	129
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	484
Chief Executive Officer [Member]
Accrued Liabilities, Current, Total	482	659
Wayne Stewart [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	292	353
Jeff Shinkle [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	$ 247	255
Craig Stewart [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party		$ 503

Note 14 - 401(k) Profit Shari_2

Note 14 - 401(k) Profit Sharing Plan (Details Textual) $ in Thousands	12 Months Ended
	Apr. 30, 2022 USD ($)	Apr. 30, 2021 USD ($)
Number of Days of Service Eligible to Participate in Plan (Day)	30 days
Number of Entry Dates per Calendar Year to Participate in Plan	2
Defined Contribution Plan Matching Contribution, as Percent of Every Pretax Dollar	100%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6%
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage	100%
Defined Contribution Plan, Cost	$ 807	$ 721

Note 15 - Segment Reporting a_3

Note 15 - Segment Reporting and Sales by Major Customer (Details Textual)	12 Months Ended
	Apr. 30, 2022
Number of Operating Segments	2
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | The Five Aerospace Customers [Member]
Concentration Risk, Percentage	34.10%
Number of Major Customers	5
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Top Customer [Member]
Concentration Risk, Percentage	14.30%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Next Top Four Customers [Member] | Minimum [Member]
Concentration Risk, Percentage	2.70%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Next Top Four Customers [Member] | Maximum [Member]
Concentration Risk, Percentage	10.70%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Customer One [Member]
Concentration Risk, Percentage	44.80%
Number of Major Customers	1

Note 15 - Segment Reporting a_4

Note 15 - Segment Reporting and Sales by Major Customer - Professional Services (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Revenues	$ 73,473	$ 61,480
Interest expense	2,689	3,138
Depreciation and amortization	2,815	3,542
Gaming [Member]
Revenues	38,769	29,951
Interest expense	2,440	2,847
Depreciation and amortization	2,283	3,060
Aircraft Modification [Member]
Revenues	21,399	21,750
Interest expense	215	251
Depreciation and amortization	181	191
Aircraft Avionics [Member]
Revenues	2,373	2,583
Interest expense	0	0
Depreciation and amortization	5	7
Special Mission Electronics [Member]
Revenues	10,554	6,942
Interest expense	23	27
Depreciation and amortization	161	135
Product and Service, Other [Member]
Revenues	378	254
Interest expense	11	13
Depreciation and amortization	$ 185	$ 149

Note 15 - Segment Reporting a_5

Note 15 - Segment Reporting and Sales by Major Customer - Schedule of Revenue by Major Customers by Reporting Segments (Details) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Aerospace Products [Member]
Concentration risk percentage	25%	10.60%
Professional Services [Member]
Concentration risk percentage	0%	0%

Note 16 - Subsequent Events (De

Note 16 - Subsequent Events (Details Textual) - Subsequent Event [Member] - Board Member [Member]	1 Months Ended
	Jun. 30, 2022 USD ($) shares
Compensation Expense, Excluding Cost of Good and Service Sold | $	$ 140,000
Butler National Corporation 2016 Equity Incentive Plan [Member] | Other Stock-based Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares	400,000