SigmaTron International (SGMA) 10-Q 14 Mar 18 2018 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Jan. 31, 2018	Mar. 12, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jan. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	sgma
Entity Registrant Name	SIGMATRON INTERNATIONAL INC
Entity Central Index Key	915,358
Current Fiscal Year End Date	--04-30
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		4,215,258

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($)	Jan. 31, 2018	Apr. 30, 2017
Current assets:
Cash and cash equivalents	$ 2,543,294	$ 3,493,324
Accounts receivable, less allowance for doubtful accounts of $100,000 at January 31, 2018 and April 30, 2017, respectively	26,685,952	26,656,871
Inventories, net	86,257,520	73,571,238
Prepaid expenses and other assets	2,427,051	2,971,087
Refundable and prepaid income taxes	1,785,672	339,791
Notes receivable	1,517,531	887,531
Other receivables	713,259	1,112,071
Total current assets	121,930,279	109,031,913
Property, machinery and equipment, net	35,734,560	33,008,714
Intangible assets, net of amortization of $5,026,324 and $4,698,765 at January 31, 2018 and April 30, 2017, respectively	3,885,676	4,213,235
Goodwill	3,222,899	3,222,899
Deferred income taxes	282,979	236,087
Other assets	1,075,961	1,472,816
Total other long-term assets	8,467,515	9,145,037
Total assets	166,132,354	151,185,664
Current liabilities:
Trade accounts payable	46,264,080	44,859,344
Accrued wages	4,670,869	4,489,602
Accrued expenses	2,259,194	3,623,106
Income taxes payable		69,868
Current portion of long-term debt	655,190	351,562
Current portion of capital lease obligations	2,257,069	1,711,204
Current portion of contingent consideration	273,907	286,240
Current portion of deferred rent	233,867	220,288
Total current liabilities	56,614,176	55,611,214
Long-term debt, less current portion	39,115,981	27,192,246
Income taxes payable	473,000
Capital lease obligations, less current portion	4,221,697	3,364,825
Contingent consideration, less current portion	59,395	237,578
Deferred rent, less current portion	362,839	555,348
Other long-term liabilities	1,105,810	991,017
Deferred income taxes	977,300	1,361,291
Total long-term liabilities	46,316,022	33,702,305
Total liabilities	102,930,198	89,313,519
Commitments and contingencies
Stockholders' equity:
Preferred stock, $.01 par value; 500,000 shares authorized, none issued or outstanding
Common stock, $.01 par value; 12,000,000 shares authorized, 4,215,258 and 4,195,813 shares issued and outstanding at January 31, 2018 and April 30, 2017, respectively	41,896	41,702
Capital in excess of par value	23,132,017	22,952,535
Retained earnings	40,028,243	38,877,908
Total stockholders' equity	63,202,156	61,872,145
Total liabilities and stockholders' equity	$ 166,132,354	$ 151,185,664

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Jan. 31, 2018	Apr. 30, 2017
Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 100,000	$ 100,000
Intangible assets, amortization	$ 5,026,324	$ 4,698,765
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	12,000,000	12,000,000
Common stock, shares issued	4,215,258	4,195,813
Common stock, shares outstanding	4,215,258	4,195,813

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Operations - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Condensed Consolidated Statements Of Operations [Abstract]
Net sales	$ 65,733,723	$ 62,164,167	$ 209,917,090	$ 187,509,084
Cost of products sold	59,836,383	56,477,208	190,159,128	170,232,866
Gross profit	5,897,340	5,686,959	19,757,962	17,276,218
Selling and administrative expenses	5,637,680	5,353,020	17,192,099	16,268,296
Operating income	259,660	333,939	2,565,863	1,007,922
Other income	(48,052)	(28,536)	(128,218)	(127,808)
Interest expense	423,584	273,439	1,077,654	793,220
(Loss) income from operations before income tax expense	(115,872)	89,036	1,616,427	342,510
Income tax (benefit) expense	(147,210)	136,888	466,092	210,470
Net income (loss)	$ 31,338	$ (47,852)	$ 1,150,335	$ 132,040
Earnings (loss) per share - basic	$ 0.01	$ (0.01)	$ 0.27	$ 0.03
Earnings (loss) per share - diluted	$ 0.01	$ (0.01)	$ 0.27	$ 0.03
Weighted average shares of common stock outstanding Basic	4,209,566	4,186,813	4,202,331	4,185,507
Weighted average shares of common stock outstanding Diluted	4,356,509	4,186,813	4,325,197	4,223,395

Condensed Consolidated Stateme5

Condensed Consolidated Statements Of Cash Flows - USD ($)	9 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Cash flows from operating activities
Net income	$ 1,150,335	$ 132,040
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	3,844,692	3,764,227
Stock-based compensation	83,659	252,722
Restricted stock expense		40,762
Deferred income tax (benefit)	(430,883)	(391,533)
Amortization of intangible assets	327,559	367,145
Amortization of financing fees	42,347	33,713
Fair value adjustment of contingent consideration	(15,247)	(106,519)
Loss from disposal or sale of machinery and equipment	20,011	40,811
Changes in assets and liabilities
Accounts receivable	(29,081)	(2,871,723)
Inventories	(12,686,282)	(722,244)
Prepaid expenses and other assets	1,626,212	443,331
Refundable and prepaid income taxes	(1,445,881)	75,478
Income taxes payable	403,132	258,451
Trade accounts payable	1,404,736	845,457
Deferred rent	(178,930)	(152,575)
Accrued expenses and wages	(1,354,361)	(1,139,155)
Net cash (used in) provided by operating activities	(7,237,982)	870,388
Cash flows from investing activities
Purchases of machinery and equipment	(3,651,304)	(3,213,323)
Net cash used in investing activities	(3,651,304)	(3,213,323)
Cash flows from financing activities
Advances on notes receivable	(630,000)
Proceeds from the exercise of common stock options	96,017	4,320
Proceeds from Employee stock purchases		8,347
Proceeds under equipment notes	943,136	596,987
Payments of contingent consideration	(175,269)	(217,242)
Payments under capital lease and sale leaseback agreements	(1,536,508)	(1,187,249)
Payments under equipment notes	(203,531)
Proceeds under building notes payable	7,000,000
Payments under building notes payable	(3,671,000)	(123,750)
Borrowings under lines of credit	15,613,799	59,681,666
Payments under lines of credit	(7,345,462)	(57,648,175)
Payments of financing fees	(151,926)
Net cash provided by financing activities	9,939,256	1,114,904
Change in cash and cash equivalents	(950,030)	(1,228,031)
Cash and cash equivalents at beginning of period	3,493,324	4,325,268
Cash and cash equivalents at end of period	2,543,294	3,097,237
Supplementary disclosures of cash flow information
Cash paid for interest	983,168	789,572
Cash paid for income taxes	1,878,850	402,526
Purchase of machinery and equipment financed under capital leases	2,939,245	1,159,851
Financing of insurance policy	$ 286,509	$ 266,656

Basis Of Presentation

Basis Of Presentation	9 Months Ended
	Jan. 31, 2018
Basis Of Presentation [Abstract]
Basis Of Presentation	Note A - Basis of Presentation  The accompanying unaudited condensed consolidated financial statements of SigmaTron International, Inc. (“SigmaTron”), SigmaTron’s wholly-owned subsidiaries Standard Components de Mexico S.A., AbleMex, S.A. de C.V., Digital Appliance Controls de Mexico, S.A. de C.V., Spitfire Controls (Vietnam) Co. Ltd., Spitfire Controls (Cayman) Co. Ltd. and wholly-owned foreign enterprises Wujiang SigmaTron Electronics Co., Ltd. and SigmaTron Electronic Technology Co., Ltd. (“SigmaTron China”) and international procurement office SigmaTron Taiwan branch (collectively, the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X.  Accordingly, the condensed consolidated financial statements do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three and nine month periods ended January 31, 2018 are not necessarily indicative of the results that may be expected for the year ending April 30, 2018. For further information, refer to the condensed consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended April 30, 2017.

Inventories, Net

Inventories, Net	9 Months Ended
	Jan. 31, 2018
Inventories, Net [Abstract]
Inventories, Net	Note B - Inventories, net  The components of inventory consist of the following:       January 31, April 30,  2018 2017   Finished products $ 21,428,423 $ 20,291,768  Work-in-process 1,829,670 1,795,852  Raw materials 64,221,145 52,748,542  87,479,238 74,836,162  Less excess and obsolescence reserve (1,221,718) (1,264,924)  $ 86,257,520 $ 73,571,238

Earnings Per Share And Stockhol

Earnings Per Share And Stockholders' Equity	9 Months Ended
	Jan. 31, 2018
Earnings Per Share And Stockholders' Equity [Abstract]
Earnings Per Share And Stockholders' Equity	Note C - Earnings Per Share and Stockholders’ Equity  The following table sets forth the computation of basic and diluted earnings per share:     Three Months Ended Six Months Ended  January 31, January 31,  2018 2017 2018 2017   Net income (loss) $ 31,338 $ (47,852) $ 1,150,335 $ 132,040  Weighted-average shares  Basic 4,209,566 4,186,813 4,202,331 4,185,507  Effect of dilutive stock options 146,943 - 122,866 37,888   Diluted 4,356,509 4,186,813 4,325,197 4,223,395   Basic earnings per share $ 0.01 $ (0.01) $ 0.27 $ 0.03   Diluted earnings per share $ 0.01 $ (0.01) $ 0.27 $ 0.03  Options to purchase 347,318 and 366, 763 shares of common stock were outstanding at January 31, 2018 and 2017, respectively. There were no options granted during the nine month periods ended January 31, 2018 and 2017, respectively. The Company recognized $ 0 and $82, 759 in stock option expense for the three month periods ended January 31, 2018 and 2017, respectively. The Company recognized $83,659 and $249,163 in stock option expense for the nine month periods ended January 31, 2018 and 2017, respectively. The balance of unrecognized compensation expense related to the Company’s stock option plans was $0 and $163,720 at January 31, 2018 and 2017, respectively. There were no anti-dilutive common stock equivalents outstanding during the three and nine month periods ended January 31, 2018. There were 29,149 and 0 anti-dilutive common stock equivalents outstanding during the three and nine month periods ended January 31, 2017 which were excluded from the calculation of diluted earnings per share. On October 1, 2016, the Company issued 11,250 shares of restricted stock pursuant to the 2013 Non-Employee Director Restricted Stock Plan, which fully vested on April 1, 2017. The Company recognized no compensation expense with respect to such shares for the three and nine month periods ended January 31, 2018. The Company recognized $30,488 and $40,762 in compensation expense for the three and nine month periods ended January 31, 2017.  The Company implemented an employee stock purchase plan (“ESPP”) for all eligible employees on February 1, 2014. The ESPP reserved 500,000 shares of common stock for issuance to employees. In addition, the number of shares of common stock reserved for issuance under the plan automatically increases on the first day of the Company’s fiscal years by 25,000 shares. The ESPP was terminated effective August 15, 2016 . Final purchases under the ESPP were completed on August 31, 2016 . The Company recorded no compensation expense for the three months ended January 31, 2018 and 2017. The Company recorded $0 and $3,559 in compensation expense for the  Note C - Earnings Per Share and Stockholders’ Equity - Continued  nine months ended January 31, 2018 and 2017 respectively. During the three months ended January 31, 2018 and 2017, there were no purchases under the ESPP. During the nine months ended January 31, 2018 and 2017, the Company recorded $0 and $8,347 , respectively, to stockholders’ equity relating to purchases under the ESPP.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Jan. 31, 2018
Long-Term Debt [Abstract]
Long-Term Debt	Note D - Long-term Debt  Notes Payable – Banks  On March 31, 2017, the Company entered into a $35,000,000 senior secured credit facility with U.S. Bank, N.A., which expires on March 31, 2022 . The credit facility is collateralized by substantially all of the Company’s domestically located assets. The facility allows the Company to choose among interest rates at which it may borrow funds: the fixed rate of four percent or LIBOR plus one and one half percent (effectively 3.204% at January 31, 2018). Interest is due monthly. Under the senior secured credit facility, the Company may borrow up to the lesser of (i) $35,000,000 or (ii) an amount equal to a percentage of the eligible receivable borrowing base plus a percentage of the inventory borrowing base. Deferred financing costs of $34,971 and $207,647 were capitalized in the nine month period ending January 31, 2018 and the fourth quarter of fiscal 2017, respectively, which are amortized over the term of the agreement. As of January 31, 2018 and April 30, 2017 the unamortized amount included in other assets was $204,789 and $204,186 , respectively. As of January 31, 2018, there was $31,446,765 outstanding and $3,553,235 of unused availability under the credit facility agreement compared to an outstanding balance of $23,178,429 and $11,821,571 of unused availability at April 30, 2017. At January 31, 2018, the Company was in compliance with its financial covenant and other restricted covenants under the credit facility.  On August 4, 2015, the Company’s wholly-owned subsidiary, Wujiang SigmaTron Electronics Co., Ltd., entered into a credit facility with China Construction Bank. Under the agreement Wujiang SigmaTron Electronics Co., Ltd. could borrow up to 5,000,000 Renminbi and the facility was collateralized by Wujiang SigmaTron Electronics Co., Ltd.’s manufacturing building. Interest was payable monthly and the facility had a fixed interest rate of 6.67% . The facility was due to expire on August 3, 2017 . The credit facility was closed as of March 1, 2017 .  On March 24, 2017, the Company’s wholly-owned subsidiary, SigmaTron Electronic Technology Co., Ltd., entered into a credit facility with China Construction Bank. Under the agreement SigmaTron Electronic Technology Co., Ltd. can borrow up to 9,000,000 Renminbi and the facility is collateralized by Wujiang SigmaTron Electronics Co., Ltd.’s manufacturing building. Interest is payable monthly and the facility bears a fixed interest rate of 6.09% . The term of the facility extends to February 7, 2018 . There was no outstanding balance under the facility at January 31, 2018 or April 30, 2017. The credit facility was closed as of February 11, 2018 .  On February 12, 2018, the Company’s wholly-owned subsidiary, SigmaTron Electronic Technology Co., Ltd., entered into a credit facility with China Construction Bank. Under the agreement SigmaTron Electronic Technology Co., Ltd. can borrow up to 5,000,000 Renminbi and the facility is collateralized by Wujiang SigmaTron Electronics Co., Ltd.’s manufacturing building. Interest is payable monthly and the facility bears a fixed interest rate of 6.09% . The term of the facility extends to February 7, 2019 . Note D - Long-term Debt - Continued  Notes Payable – Buildings  The Company entered into a mortgage agreement on January 8, 2010, in the amount of $2,500,000 , with Wells Fargo, N.A. to refinance the property that serves as the Company’s corporate headquarters and its Illinois manufacturing facility. On November 24, 2014, the Company refinanced the mortgage agreement with Wells Fargo, N.A. The note required the Company to pay monthly principal payments in the amount of $9,500 , bore an interest rate of LIBOR plus two and one-quarter percent and was payable over a sixty month period. A final payment of approximately $2,289,500 was due on or before November 8, 2019 . On December 21, 2017, the Company repaid its Wells Fargo, N.A. mortgage agreement for the remaining amount outstanding of $2,498,500 , using proceeds from the U.S. Bank, N.A. mortgage agreement.  The Company entered into a mortgage agreement on December 21, 2017, in the amount of $5,200,000 , with U.S. Bank, N.A. to refinance the property that serves as the Company’s corporate headquarters and its Illinois manufacturing facility. The note requires the Company to pay monthly principal payments in the amount of $17,333 , bears interest at a fixed rate of 4.0% per year and is payable over a fifty-one month period. Deferred financing costs of $62,650 were capitalized in the third quarter of fiscal 2018 which are amortized over the term of the agreement. As of January 31, 2018 the unamortized amount included in other assets was $60,240 . A final payment of approximately $4,347,778 is due on or before March 31, 2022 . The outstanding balance was $5,200,000 at January 31, 2018.  The Company entered into a mortgage agreement on October 24, 2013, in the amount of $1,275,000 , with Wells Fargo, N.A. to finance the property that serves as the Company’s engineering and design center in Elgin, Illinois. The Wells Fargo, N.A. note required the Company to pay monthly principal payments in the amount of $4,250 , bore interest at a fixed rate of 4.5% per year and was payable over a sixty month period. A final payment of approximately $1,030,000 was due on or before October 2018 . On December 21, 2017, the Company repaid its Wells Fargo, N.A. mortgage agreement for the remaining amount outstanding of $1,062,500 , using proceeds from the U.S. Bank, N.A. mortgage agreement.  The Company entered into a mortgage agreement on December 21, 2017, in the amount of $1,800,000 , with U.S. Bank, N.A. to refinance the property that serves as the Company’s engineering and design center in Elgin, Illinois. The note requires the Company to pay monthly principal payments in the amount of $6,000 , bears interest at a fixed rate of 4.0% per year and is payable over a fifty-one month period. Deferred financing costs of $54,303 were capitalized in the third quarter of fiscal 2018 which are amortized over the term of the agreement. As of January 31, 2018 the unamortized amount included in other assets was $52,215 . A final payment of approximately $1,505,000 is due on or before March 31, 2022 . The outstanding balance was $1,800,000 at January 31, 2018.  Notes Payable – Equipment  On November 1, 2016, the Company entered into a secured note agreement with Engencap Fin S.A. DE C.V. to finance the purchase of equipment in the amount of $596,987 . The term of the agreement extends to November 1, 2021 with average quarterly payments of $35,060 beginning on February 1 , Note D - Long-term Debt - Continued  2017 and a fixed interest rate of 6.65% . The balance outstanding under this note agreement was $477,590 and $567,138 at January 31, 2018 and April 30, 2017, respectively.  On February 1, 2017, the Company entered into a secured note agreement with Engencap Fin S.A. DE C.V. to finance the purchase of equipment in the amount of $335,825 . The term of the agreement extends to February 1, 2022 with average quarterly payments of $20,031 beginning on May 1, 2017 and a fixed interest rate of 7.35% . The balance outstanding under this note agreement was $285,451 and $335,825 at January 31, 2018 and April 30, 2017, respectively.  On June 1, 2017, the Company entered into a secured note agreement with Engencap Fin S.A. DE C.V. to finance the purchase of equipment in the amount of $636,100 . The term of the agreement extends to June 1, 2022 with average quarterly payments of $37,941 beginning on September 1, 2017 and a fixed interest rate of 7.35% . The balance outstanding under this note agreement was $572,490 at January 31, 2018.  On October 1, 2017, the Company entered into a secured note agreement with Engencap Fin S.A. DE C.V. to finance the purchase of equipment in the amount of $307,036 . The term of the agreement extends to November 1, 2022 with average quarterly payments of $18,314 beginning on February 1, 2018 and a fixed interest rate of 7.35% . The balance outstanding under this note agreement was $307,036 at January 31, 2018.  Capital Lease and Sales Leaseback Obligations  From October 2013 through June 2017, the Company entered into various capital lease and sales leaseback agreements with Associated Bank, National Association to purchase equipment totaling $6,893,596 . The terms of the lease agreements extend to September 2018 through May 2022 with monthly installment payments ranging from $1,455 to $40,173 and a fixed interest rate ranging from 3.75% to 4.90% . The balance outstanding under these capital lease agreements was $3,269,797 and $3,627,760 at January 31, 2018 and April 30, 2017, respectively. The net book value of the equipment under these leases was $4,941,712 and $4,713,044 at January 31, 2018 and April 30, 2017, respectively.  From April 2014 through July 2015, the Company entered into various capital lease agreements with CIT Finance LLC to purchase equipment totaling $2,512,051 . The terms of the lease agreements extend to March 2019 through July 2020 with monthly installment payments ranging from $1,931 to $12,764 and a fixed interest rate ranging from 5.65% through 6.50% . The balance outstanding under these capital lease agreements was $1,102,655 and $1,448,269 at January 31, 2018 and April 30, 2017, respectively. The net book value of the equipment under these leases was $1,789,022 and $1,946,026 at January 31, 2018 and April 30, 2017, respectively.  From September 2017 through January 2018, the Company entered into various capital sales leaseback agreements with First American Equipment Finance to purchase equipment totaling $2,263,412 . The terms of the lease agreements extend to August 2021 through January 2022 with monthly installment payments ranging from $8,198 to $20,093 and a fixed interest rate ranging from 5.82% through 7.00% .   Note D - Long-term Debt – Continued  The balance outstanding under these capital lease agreements was $2,083,514 at January 31, 2018. The net book value of the equipment under these leases was $2,137,388 at January 31, 2018. 

Goodwill And Intangible Assets

Goodwill And Intangible Assets	9 Months Ended
	Jan. 31, 2018
Goodwill And Intangible Assets [Abstract]
Goodwill And Intangible Assets	Note E - Goodwill and Intangible Assets  Goodwill  There were no changes in the carrying amount of tax-deductible goodwill in the amount of $3,222,899 for the three and nine months ended January 31, 2018 and 2017, respectively.  Intangible Assets  Intangible assets subject to amortization are summarized as of January 31, 2018 as follows:    Weighted Average  Remaining Gross  Amortization Carrying Accumulated  Period (Years) Amount Amortization   Other intangible assets – Able - $ 375,000 $ 375,000  Customer relationships – Able - 2,395,000 2,395,000  Spitfire:  Non-contractual customer relationships 9.33 4,690,000 1,516,220  Backlog - 22,000 22,000  Trade names 14.33 980,000 277,644  Non-compete agreements 1.33 50,000 40,460  Patents - 400,000 400,000  Total $ 8,912,000 $ 5,026,324   Note E - Goodwill and Other Intangible Assets - Continued  Intangible assets subject to amortization are summarized as of April 30, 2017, as follows:      Weighted Average  Remaining Gross  Amortization Carrying Accumulated  Period (Years) Amount Amortization   Other intangible assets – Able - $ 375,000 $ 375,000  Customer relationships – Able - 2,395,000 2,395,000  Spitfire:  Non-contractual customer relationships 10.08 4,690,000 1,237,410  Backlog - 22,000 22,000  Trade names 15.08 980,000 240,897  Non-compete agreements 2.08 50,000 35,105  Patents 0.08 400,000 393,353  Total $ 8,912,000 $ 4,698,765   Estimated aggregate amortization expense for intangible assets, which becomes fully amortized in 2032 , for the remaining periods is as follows:     For the remaining 3 months of the fiscal year ending April 30: 2018 $ 107,484  For the fiscal years ending April 30: 2019 423,721  2020 411,406  2021 403,199  2022 395,578  Thereafter 2,144,288  $ 3,885,676  Amortization expense was $107,484 and $122,865 for the three months ended January 31, 2018 and 2017, respectively. Amortization expense was $327, 559 and $367, 145 for the nine months ended January 31, 2018 and 2017, respectively.   Note E - Goodwill and Other Intangible Assets - Continued  In conjunction with the May 2012 acquisition of Spitfire, an estimate of the fair value of the contingent consideration, $2,320,000 , was recorded based on expected operating results through fiscal 2019 and the specific terms of when such consideration would be earned. Those terms provide for additional consideration to be paid based on a percentage of sales and pre-tax profits over those years in excess of certain minimums. Payments are made quarterly each year and adjusted after each year-end audit. During fiscal year 2017 the Company decreased the estimated remaining payments expected to be paid under the agreement, which resulted in a decrease of $353,591 to the contingent consideration liability. Any change in the Company’s estimate is reflected as a change in the contingent consideration liability and as additional charges or credits to selling and administrative expenses. The Company made payments totaling $175,270 and $217,242 , respectively, as of January 31, 2018 and 2017. As of January 31, 2018, the contingent consideration liability was $333,302 compared to $523,818 at April 30, 2017.

Income Tax

Income Tax	9 Months Ended
	Jan. 31, 2018
Income Tax [Abstract]
Income Tax	Note F – Income Tax  The income tax benefit was $147,210 for the three month period ended January 31, 2018 compared to an income tax expense of $136,888 for the same period in the prior fiscal year. The decrease in income tax expense for the three month period ended January 31, 2018 compared to the same period in the previous year is the result of lower pretax income recognized in the U.S. The Company’s effective tax rate was 127.0% and 153.74% for the quarters ended January 31, 2018 and 2017, respectively. The effective tax rate for the quarter ended January 31, 2018 is lower than the quarter ended January 31, 2017 due to less income recognized in high tax rate jurisdictions for the period ended January 31, 2018. Income tax expense was $466,092 for the nine month period ended January 31, 2018 compared to income tax expense of $210,470 for the same period in the prior year. The Company’s effective tax rate was 28.8% and 61.45% for the nine months ended January 31, 2018 and 2017, respectively. The effective tax rate is lower for the nine month period ended January 31, 2018 compared to the same period in the previous year due to discrete expense recognized in the period ended January 31, 2017 related to the increase in valuation allowance associated with a foreign tax credit. Due to the Tax Cuts and Jobs Act, the Company’s federal statutory income tax rate for the current fiscal year is approximately 30.4% .  On December 22, 2017, the U.S. enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act makes broad and complex changes to the U.S. tax code, including, but not limited to reducing the U.S. federal corporate tax rate from 34% to 21% and imposing a mandatory one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred.  Due to the Tax Act, the SEC staff issued Staff Accounting Bulletin 118 (“SAB 118”), which provides guidance on accounting for the tax effects of the Tax Act. SAB 118 provides a measurement period that should not extend beyond one year from the Tax Act enactment date for companies to complete the accounting under ASC 740. In accordance with SAB 118, a company must reflect the income tax effects of those aspects of the Tax Act for which the accounting under ASC 740 is complete. To the extent that a company’s accounting for certain income tax effects of the Tax Act is incomplete but it is able to determine a reasonable estimate, it must record a provisional estimate in the financial statements. If a company cannot determine a provisional estimate to be included in the financial  Note F – Income Tax - Continued  statements, it should continue to apply ASC 740 on the basis of the provisions of the tax laws that were in effect immediately before the enactment of the Tax Act.  Due to the timing of the enactment and the complexity involved in applying the provisions of the Tax Act, the Company has made reasonable estimates for certain effects of the Tax Act and recorded provisional amounts in its financial statements as of January 31, 2018. As the Company collects and prepares necessary calculations of cumulative earnings and profits, tax pools and amounts held in cash or other specified assets, as well as interprets the Tax Act and any additional guidance issued by the U.S. Treasury Department, the IRS, and other standard-setting bodies, the Company may make adjustments to the provisional amounts. Those adjustments may materially impact its provision for income taxes and effective tax rate in the period in which the adjustments are made. The Company expects to complete its accounting for the tax effects of the Tax Act in fiscal year 2019.  In connection with the Company’s initial analysis of the impact of the Tax Act, a discrete tax expense of approximately $58,000 has been recorded as a provisional estimate in the period ending January 31, 2018.  Provisional Amounts The Company remeasured certain deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future, which is generally 21%. However, the Company is still analyzing certain aspects of the Tax Act and refining its calculations, which could potentially affect the measurement of these balances or potentially give rise to new deferred tax amounts. The provisional amount recorded related to the remeasurement of the Company’s deferred tax balance resulted in a decrease in income tax expense of $510,000 . Prior to the enactment of Tax Act, the Company had not recorded U.S. income taxes on the undistributed earnings of the Company’s foreign subsidiaries. The earnings of the foreign subsidiaries have been indefinitely reinvested, and as a result, no deferred tax liability was previously recorded. In light of the Tax Act and the one-time transition tax, for the period ended January 31, 2018, the Company recorded a provisional amount for its one-time transition tax liability for the cumulative undistributed earnings of its foreign subsidiaries, resulting in an increase in income tax expense of $568,000 at January 31, 2018.  The one-time transition tax is based on total post-1986 earnings and profits (E&P) that the Company previously deferred from U.S. income taxes. The entire amount of the transition tax liability, except for $95,000 , is recorded as a long-term liability. The Company has not yet completed its calculation of the total post-1986 E&P for these foreign subsidiaries. Further, the transition tax is based in part on the amount of those earnings held in cash and other specified assets. This amount may change when the Company finalizes the calculation of post-1986 foreign E&P previously deferred from U.S. federal taxation and finalize the amounts held in cash or other specified assets. 

Commitments And Contingencies

Commitments And Contingencies	9 Months Ended
	Jan. 31, 2018
Commitments And Contingencies [Abstract]
Commitments And Contingencies	Note G - Commitments and Contingencies  From time to time the Company is involved in legal proceedings, claims or investigations that are incidental to the conduct of the Company’s business. In future periods, the Company could be subjected to cash cost or non-cash charges to earnings if any of these matters are resolved on unfavorable terms. However, although the ultimate outcome of any legal matter cannot be predicted with certainty, based on present information, including management’s assessment of the merits of any particular claim, the Company does not expect that these legal proceedings or claims will have any material adverse impact on its future consolidated financial position, results of operations or cash flows.

Critical Accounting Policies

Critical Accounting Policies	9 Months Ended
	Jan. 31, 2018
Critical Accounting Policies [Abstract]
Critical Accounting Policies	Note H - Critical Accounting Policies  Management Estimates and Uncertainties - The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates made in preparing the consolidated financial statements include depreciation and amortization periods, the allowance for doubtful accounts, reserves for inventory, valuation of long-lived assets and goodwill, deferred taxes, contingent consideration and other commitments and litigation. Actual results could materially differ from these estimates.  Revenue Recognition - Revenues from sales of the Company's electronic manufacturing services business are recognized when the finished good product is shipped to the customer. In general, and except for consignment inventory, it is the Company's policy to recognize revenue and related costs when the finished goods have been shipped from its facilities, which is also the same point in time that title passes under the terms of the purchase order and control passes to the customer. Finished goods inventory for certain customers is shipped from the Company to an independent warehouse for storage or shipped directly to the customer and stored in a segregated part of the customer’s own facility. Upon the customer’s request for finished goods inventory, the inventory is shipped to the customer if the inventory was stored off-site, or transferred from the segregated part of the customer’s facility for consumption or use by the customer. The Company recognizes revenue upon such shipment or transfer. The Company does not earn a fee for such arrangements. The Company from time to time may ship finished goods from its facilities, which is also the same point in time that title passes under the terms of the purchase order, and invoice the customer at the end of the calendar month. This is done only in special circumstances to accommodate a specific customer. Further, from time to time customers request the Company hold finished goods after they have been invoiced to consolidate finished goods for shipping purposes. The Company generally provides a warranty for workmanship, unless the assembly was designed by the Company, in which case it warrants assembly/design. The Company does not have any installation, acceptance or sales incentives (although the Company has negotiated longer warranty terms in certain instances). The Company assembles and tests assemblies based on customers’ specifications. Historically, the amount of returns for workmanship issues has been de minimis under the Company’s standard or extended warranties.  Inventories - Inventories are valued at cost. Cost is determined by an average cost method and the Company allocates labor and overhead to work-in-process and finished goods. In the event of an Note H - Critical Accounting Policies - Continued  inventory write-down, the Company records expense to state the inventory at lower of cost or net realizable value. The Company establishes inventory reserves for valuation, shrinkage, and excess and obsolete inventory. The Company records provisions for inventory shrinkage based on historical experience to account for unmeasured usage or loss. The Company records provisions for excess and obsolete inventories for the difference between the cost of inventory and its estimated realizable value based on assumptions about future product demand and market conditions. For convenience, the Company records these inventory reserves against the inventory cost through a contra asset rather than through a new cost basis. Upon a subsequent sale or disposal of the impaired inventory, the corresponding reserve is relieved to ensure the cost basis of the inventory reflects any reductions. Actual results differing from these estimates could significantly affect the Company’s inventories and cost of products sold as the inventory is sold or otherwise relieved.  Goodwill - Goodwill represents the purchase price in excess of the fair value of assets acquired in business combinations. Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 350, “Intangibles – Goodwill and Other,” requires the Company to assess goodwill and other indefinite-lived intangible assets for impairment at least annually in the absence of an indicator of possible impairment and immediately upon an indicator of possible impairment. The Company is permitted the option to first assess qualitative factors to determine whether the existence of events and circumstances indicates that it is more likely than not that the fair value of any reporting unit is less than its corresponding carrying value. If, after assessing the totality of events and circumstances, the Company concludes that it is not more likely than not that the fair value of any reporting unit is less than its corresponding carrying value, then the Company is not required to take further action. However, if the Company concludes otherwise, then it is required to perform a quantitative impairment test, including computing the fair value of the reporting unit and comparing that value to its carrying value. If the fair value is less than its carrying value, a second step of the test is required to determine if recorded goodwill is impaired. The Company also has the option to bypass the qualitative assessment for goodwill in any period and proceed directly to performing the quantitative impairment test. The Company will be able to resume performing the qualitative assessment in any subsequent period. The Company performed its annual goodwill impairment test as of February 1, 2017 and determined no impairment existed as of that date. The step one analysis was performed using a combination of a market approach and an income approach based on a discounted cash flow approach. The Company did no t note any triggering events that might indicate an impairment during the three and nine month periods ended January 31, 2018.  Intangible Assets - Intangible assets are comprised of finite life intangible assets including patents, trade names, backlog, non-compete agreements, and customer relationships. Finite life intangible assets are amortized on a straight line basis over their estimated useful lives of 5 years for patents, 20 years for trade names, 1 year for backlog and 7 years for non-compete agreements except for customer relationships which are amortized on an accelerated basis over their estimated useful life of 15 years.  Impairment of Long-Lived Assets - The Company reviews long-lived assets, including amortizable intangible assets, for impairment. Property, machinery and equipment and finite life intangible assets are reviewed whenever events or changes in circumstances occur that indicate possible impairment. If events or changes in circumstances occur that indicate possible impairment, the Company first performs an impairment review based on an undiscounted cash flow analysis at the lowest level at which cash flows of the long-lived assets are largely independent of other groups of its assets and Note H - Critical Accounting Policies - Continued  liabilities. This analysis requires management judgment with respect to changes in technology, the continued success of product lines, and future volume, revenue and expense growth rates. If the carrying value exceeds the undiscounted cash flows, the Company records an impairment, if any, for the difference between the estimated fair value of the asset group and its carrying value. The Company further conducts annual reviews for idle and underutilized equipment, and reviews business plans for possible impairment. As of January 31, 2018, there were no indicators of possible impairment of long-lived assets.  Income Tax - The Company’s income tax expense, deferred tax assets and liabilities and reserves for unrecognized tax benefits reflect management’s best assessment of estimated future taxes to be paid. The Company is subject to income taxes in both the U.S. and several foreign jurisdictions. Significant judgments and estimates by management are required in determining the consolidated income tax expense assessment.  Deferred income tax assets and liabilities are determined based on differences between financial reporting and tax basis of assets and liabilities, and are measured using the enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. In evaluating the Company’s ability to recover its deferred tax assets within the jurisdiction from which they arise, the Company considers all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax planning strategies and recent financial operations. In projecting future taxable income, the Company begins with historical results and changes in accounting policies, and incorporates assumptions including the amount of future state, federal and foreign pre-tax operating income, the reversal of temporary differences, and the implementation of feasible and prudent tax planning strategies. These assumptions require significant judgment and estimates by management about the forecasts of future taxable income and are consistent with the plans and estimates the Company uses to manage the underlying businesses. In evaluating the objective evidence that historical results provide, the Company considers three years of cumulative operating income and/or loss. Valuation allowances are established when necessary to reduce deferred income tax assets to an amount more likely than not to be realized. The Company established a valuation allowance of $78,100 related to its foreign tax credit carry-forward at April 30, 2017. The Company did no t change the previous valuation allowance or establish any new valuation allowances at January 31, 2018.  Reclassifications - Certain reclassifications have been made to the previously reported 2017 financial statements to conform to the 2018 presentation. There was no change to net income.  Note H - Critical Accounting Policies – Continued  New Accounting Standards:  In May 2014, the FASB issued Accounting Standards Update (“ASU”) No. 2014-09, "Revenue from Contracts with Customers" (Topic 606) which supersedes the revenue recognition requirements in ASC 605, “ Revenue Recognition” . In summary, the core principle of this standard, along with various subsequent amendments, is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Additionally, the new standard requires enhanced disclosures about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts, including revenue recognition policies to identify performance obligations, assets recognized from costs incurred to obtain and fulfill a contract, and significant judgments in measurements and recognition. The standard, as amended, will be effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. Companies have the option of using either a full or modified retrospective approach in applying this standard. The Company, along with its third-party advisor, is currently in the process of finalizing its analysis to determine the impact the new standard will have on its consolidated financial statements. This analysis includes reviewing 1) contract terms and existing accounting policies to determine the financial impact of the standard, 2) data availability and system reports to meet the additional disclosure requirements of the standard, 3) any practical expedients the Company will elect upon adoption and 4) the control environment and internal processes to ensure the appropriate controls are in place. The Company is specifically evaluating the impact that adoption of the new revenue recognition standard may have on its accounting for manufactured finished goods for which the Company’s performance obligation has been fulfilled but that have not yet been shipped to the customer. The Company’s adoption of ASC 606 may result in accelerated recognition of revenue as compared to our current policy. The Company is continuing its evaluation of this issue and anticipates reaching a conclusion during the fourth quarter of fiscal year ending April 30, 2018. The Company will adopt the ASU effective the first quarter of fiscal year ending April 30, 2019 and expects using the modified retrospective transition method , which may result in a significant transition adjustment to retained earnings for the cumulative effect of applying the new standard as of the effective date. The Company expects that the disclosures in the notes to its consolidated financial statements related to revenue recognition will be expanded under the new standards. As the Company continues to assess all potential impacts of the standard, any preliminary conclusions are subject to change.  Note H - Critical Accounting Policies - Continued  In February 2016, the FASB issued ASU No. 2016-02, “ Leases” . The new standard establishes a right-of-use (ROU) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach is required for capital leases and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. While the Company is still evaluating the impact of its pending adoption of the new standard on its consolidated financial statements, the Company expects that upon adoption in the fiscal year ending April 30, 2020, it will recognize ROU assets and lease liabilities and that the amounts could be material.  In March 2016, the FASB issued ASU No. 2016-09, “ Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting”, a new accounting standard update intended to simplify several aspects of the accounting for share-based payment transactions including: income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. Specifically, the update requires that excess tax benefits and tax deficiencies (the difference between the deduction for tax purposes and the compensation cost recognized for financial reporting purposes) be recognized as income tax expense or benefit in the Consolidated Statements of Income, introducing a new element of volatility to the provision for income taxes. This update is effective for fiscal years beginning after December 15, 2016. Early adoption is permitted. The Company adopted the ASU on May 1, 2017. Effective with the adoption of the ASU all share-based awards continue to be accounted for as equity awards, excess tax benefits recognized on stock-based compensation expense are reflected in the consolidated statements of income as a component of the provision for income taxes on a prospective basis, excess tax benefits recognized on stock-based compensation expense are classified as an operating activity in the consolidated statements of cash flows on a prospective basis and the Company has elected to continue to estimate expected forfeitures over the course of a vesting period. The adoption of the ASU had no impact on the retained earnings, other components of equity or net assets as of the beginning of the period of adoption.  In June 2016, the FASB issued ASU No. 2016-13, “ Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments .” ASU 2016-13 introduces a new forward-looking approach, based on expected losses, to estimate credit losses on certain types of financial instruments, including trade receivables. The estimate of expected credit losses will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. This ASU also expands the disclosure requirements to enable users of financial statements to understand the entity’s assumptions, models and methods for estimating expected credit losses. For public business entities, ASU 2016-13 is effective for annual and interim reporting periods beginning after December 15, 2019, and the guidance is to be applied using the modified-retrospective approach. Earlier adoption is permitted for annual and interim reporting periods beginning after December 15, 2018. The Company is currently evaluating the new guidance and has not determined the impact this ASU may have on its consolidated financial statements.  Note H - Critical Accounting Policies – Continued  In August 2016, the FASB issued ASU Update No. 2016-15, “Statement of Cash Flows- Classification of Certain Cash Receipts and Cash Payments, ” which is intended to reduce diversity in practice in how certain transactions are classified in the statements of cash flows. This update will be effective for fiscal years beginning after December 15, 2017 (the Company’s fiscal year ending April 30, 2019), and interim periods within those fiscal years. Early adoption is permitted, provided that all of the amendments are adopted in the same period. The guidance requires application using a retrospective transition method. The Company plans to adopt the ASU in its fiscal year ending April 30, 2019. The Company does not expect the impact of the adoption of this ASU to have a material impact on the Company’s Consolidated Statements of Cash Flows.  In January 2017, the FASB issued ASU No. 2017-04, “ Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment ,” which removes the step 2 requirement to perform a hypothetical purchase price allocation to measure goodwill impairment. Goodwill impairment will now be the amount by which a reporting unit's carrying value exceeds its fair value, not to exceed the recorded amount of goodwill. This guidance is effective for public companies for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019, and early adoption is permitted. The Company decided to early adopt this guidance in the third quarter of its fiscal year ending April 30, 2018 and will apply this guidance to all future tests, including its February 1, 2018 annual impairment test.  In January 2017, the FASB issued ASU No. 2017-01, “ Business Combinations (Topic 805): Clarifying the Definition of a Business ,” which clarifies the definition of a business when evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. For public companies, this ASU is effective for annual periods beginning after December 15, 2017, including interim periods within those periods. The Company plans to adopt this ASU in the first quarter of its fiscal year ending April 30, 2019. The Company will apply the clarified definition of a business, as applicable, from the period of adoption.  In February 2018, the FASB issued ASU No. 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” The guidance permits entities to reclassify tax effects stranded in AOCI as a result of tax reform to retained earnings. This new guidance is effective for annual and interim periods in fiscal years beginning after December 15, 2018. Early adoption is permitted in annual and interim periods and can be applied retrospectively or in the period of adoption. The Company plans to adopt this ASU in the first quarter of its fiscal year ending April 30, 2019 and is currently evaluating the impact that its adoption may have on its consolidated financial statements.  

Related Parties

Related Parties	9 Months Ended
	Jan. 31, 2018
Related Parties [Abstract]
Related Parties	Note I - Related Parties  In March, 2015, two of the Company’s executive officers invested in a start-up customer. The executive officers’ investments constitute less than 2% (individually and in aggregate) of the outstanding beneficial ownership of the customer, according to information provided by the customer to the executive officers. As of January 31, 2018, the Company had an outstanding note receivable and account receivable from that customer of approximately $1,500,000 and $1,370,000 , respectively, compared to an outstanding note receivable and account receivable of approximately $888,000 and $1,271,000 , respectively, at April 30, 2017. As of January 31, 2018, inventory on hand related to this customer approximated $209,000 compared to $310,000 at April 30, 2017. Sales to this customer have not been material for the three and nine months ended January 31, 2018 or during fiscal year 2017.  On January 29, 2016, the Company entered into a memorandum of understanding with this customer. Under the subsequent agreement, effective January 29, 2016, the then outstanding account receivable of approximately $888,000 was converted into a short-term promissory note. The promissory note bears interest at the rate of 8% per annum, payable at the maturity of the promissory note. The promissory note was scheduled to mature at the earlier of October 31, 2016 , or within 10 days after the customer obtains certain equity financing, or at the closing of a sale of substantially all of the customer’s stock or assets. As additional consideration, the Company received warrants under the agreement. The warrants are ten years in duration and may be exercised at an exercise price of $0.01 per share and for a number of shares determined pursuant to the warrant, expected to be, at a minimum, approximately 1% of the customer’s then – outstanding equity securities. The Company believes the warrants have nil value. Further, the Company was granted a security interest in the customer’s accounts receivable and authority to access and be a signatory on the customer’s deposit accounts.  On December 6, 2016, the Company extended the maturity of the promissory note to July 31, 2017 . The promissory note continues to bear interest at the rate of 8% per annum, payable monthly. As consideration, the Company received additional warrants under the agreement, which the Company currently believes have nil value.  On August 25, 2017, effective as of July 31, 2017, the Company and the customer entered into a new forbearance agreement. The Company agreed to extend the maturity of the promissory note and forbear exercising its remedies until the earliest of a capital raise, the sale of the customer, or October 31, 2017, and to fund the customer’s operations while the customer explores its options by advancing a maximum of $315,000 through October 31, 2017, pursuant to a new promissory note that bears interest at 8% per annum. Additionally, should the customer’s business be sold at a price exceeding $5,000,000 and the amount necessary to pay its creditors, the Company would receive a fee in addition to the debt owed to the Company. The forbearance period and maturity date of the notes was set to expire on the earliest of a capital raise, the sale of the customer or October 31, 2017 , but the Company has a unilateral right to extend the forbearance period and maturity of the notes and to make additional advances and did so as discussed further below. Note I - Related Parties - Continued  The Company’s right to receive the sale fee is an embedded derivative to the note receivable, which is required to be separated for accounting purposes. On July 31, 2017, the fair values of the new instruments received were as follows: note receivable $887,531 , warrants $0 and embedded derivative $0 . After their initial recording at fair value, the note receivable and warrants were recorded at amortized cost. The embedded derivative will be recorded at fair value at each reporting period, with changes in value recognized as a gain or loss in the consolidated income statement. There was no gain or loss on the extinguishment, as the pre and post extinguishment fair values were consistent and there were no capitalized costs related to the extinguished instruments to expense.  During the time from November 1, 2017 through February 28, 2018, the customer prepared and distributed a confidential information memorandum to potential buyers of its business, negotiated with interested buyers, and participated in due diligence. During that time, the Company continued to provide working capital of $105,000 each month and extended on a monthly basis the forbearance period and maturity of the notes. The customer continues with its efforts to negotiate a sale of its business to a third party.  Management continues to assess whether the recorded accounts receivable, notes receivable and inventory are recoverable and whether reserves are necessary. Recently the customer and a third party have entered into negotiations for the sale of the customer’s assets. In the context of those negotiations, the Company has engaged in discussions for the full or partial release of its security interest in those assets in exchange for consideration to be paid to the Company if such a sale were to occur. The Company continues to retain its priority position as a secured creditor in a potential sale, liquidation or bankruptcy filing by or against the customer until released by the Company. Based on these factors, the Company believes the accounts receivable, notes receivable and inventory are recoverable. However, in the event that the customer fails to sell its business or raise additional capital in the short term, the Company may not receive payment in full of the obligations owed by the customer or payments by the customer to the Company may be further delayed. The Company will continue to monitor and assess any need to record a reserve against this obligation.

Critical Accounting Policies (P

Critical Accounting Policies (Policy)	9 Months Ended
	Jan. 31, 2018
Critical Accounting Policies [Abstract]
Management Estimates And Uncertainties	Management Estimates and Uncertainties - The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates made in preparing the consolidated financial statements include depreciation and amortization periods, the allowance for doubtful accounts, reserves for inventory, valuation of long-lived assets and goodwill, deferred taxes, contingent consideration and other commitments and litigation. Actual results could materially differ from these estimates.
Revenue Recognition	Revenue Recognition - Revenues from sales of the Company's electronic manufacturing services business are recognized when the finished good product is shipped to the customer. In general, and except for consignment inventory, it is the Company's policy to recognize revenue and related costs when the finished goods have been shipped from its facilities, which is also the same point in time that title passes under the terms of the purchase order and control passes to the customer. Finished goods inventory for certain customers is shipped from the Company to an independent warehouse for storage or shipped directly to the customer and stored in a segregated part of the customer’s own facility. Upon the customer’s request for finished goods inventory, the inventory is shipped to the customer if the inventory was stored off-site, or transferred from the segregated part of the customer’s facility for consumption or use by the customer. The Company recognizes revenue upon such shipment or transfer. The Company does not earn a fee for such arrangements. The Company from time to time may ship finished goods from its facilities, which is also the same point in time that title passes under the terms of the purchase order, and invoice the customer at the end of the calendar month. This is done only in special circumstances to accommodate a specific customer. Further, from time to time customers request the Company hold finished goods after they have been invoiced to consolidate finished goods for shipping purposes. The Company generally provides a warranty for workmanship, unless the assembly was designed by the Company, in which case it warrants assembly/design. The Company does not have any installation, acceptance or sales incentives (although the Company has negotiated longer warranty terms in certain instances). The Company assembles and tests assemblies based on customers’ specifications. Historically, the amount of returns for workmanship issues has been de minimis under the Company’s standard or extended warranties.
Inventories	Inventories - Inventories are valued at cost. Cost is determined by an average cost method and the Company allocates labor and overhead to work-in-process and finished goods. In the event of an Note H - Critical Accounting Policies - Continued  inventory write-down, the Company records expense to state the inventory at lower of cost or net realizable value. The Company establishes inventory reserves for valuation, shrinkage, and excess and obsolete inventory. The Company records provisions for inventory shrinkage based on historical experience to account for unmeasured usage or loss. The Company records provisions for excess and obsolete inventories for the difference between the cost of inventory and its estimated realizable value based on assumptions about future product demand and market conditions. For convenience, the Company records these inventory reserves against the inventory cost through a contra asset rather than through a new cost basis. Upon a subsequent sale or disposal of the impaired inventory, the corresponding reserve is relieved to ensure the cost basis of the inventory reflects any reductions. Actual results differing from these estimates could significantly affect the Company’s inventories and cost of products sold as the inventory is sold or otherwise relieved.
Goodwill	Goodwill - Goodwill represents the purchase price in excess of the fair value of assets acquired in business combinations. Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 350, “Intangibles – Goodwill and Other,” requires the Company to assess goodwill and other indefinite-lived intangible assets for impairment at least annually in the absence of an indicator of possible impairment and immediately upon an indicator of possible impairment. The Company is permitted the option to first assess qualitative factors to determine whether the existence of events and circumstances indicates that it is more likely than not that the fair value of any reporting unit is less than its corresponding carrying value. If, after assessing the totality of events and circumstances, the Company concludes that it is not more likely than not that the fair value of any reporting unit is less than its corresponding carrying value, then the Company is not required to take further action. However, if the Company concludes otherwise, then it is required to perform a quantitative impairment test, including computing the fair value of the reporting unit and comparing that value to its carrying value. If the fair value is less than its carrying value, a second step of the test is required to determine if recorded goodwill is impaired. The Company also has the option to bypass the qualitative assessment for goodwill in any period and proceed directly to performing the quantitative impairment test. The Company will be able to resume performing the qualitative assessment in any subsequent period. The Company performed its annual goodwill impairment test as of February 1, 2017 and determined no impairment existed as of that date. The step one analysis was performed using a combination of a market approach and an income approach based on a discounted cash flow approach. The Company did no t note any triggering events that might indicate an impairment during the three and nine month periods ended January 31, 2018.
Intangible Assets	Intangible Assets - Intangible assets are comprised of finite life intangible assets including patents, trade names, backlog, non-compete agreements, and customer relationships. Finite life intangible assets are amortized on a straight line basis over their estimated useful lives of 5 years for patents, 20 years for trade names, 1 year for backlog and 7 years for non-compete agreements except for customer relationships which are amortized on an accelerated basis over their estimated useful life of 15 years.
Impairment Of Long-Lived Assets	Impairment of Long-Lived Assets - The Company reviews long-lived assets, including amortizable intangible assets, for impairment. Property, machinery and equipment and finite life intangible assets are reviewed whenever events or changes in circumstances occur that indicate possible impairment. If events or changes in circumstances occur that indicate possible impairment, the Company first performs an impairment review based on an undiscounted cash flow analysis at the lowest level at which cash flows of the long-lived assets are largely independent of other groups of its assets and Note H - Critical Accounting Policies - Continued  liabilities. This analysis requires management judgment with respect to changes in technology, the continued success of product lines, and future volume, revenue and expense growth rates. If the carrying value exceeds the undiscounted cash flows, the Company records an impairment, if any, for the difference between the estimated fair value of the asset group and its carrying value. The Company further conducts annual reviews for idle and underutilized equipment, and reviews business plans for possible impairment. As of January 31, 2018, there were no indicators of possible impairment of long-lived assets.
Income Tax	Income Tax - The Company’s income tax expense, deferred tax assets and liabilities and reserves for unrecognized tax benefits reflect management’s best assessment of estimated future taxes to be paid. The Company is subject to income taxes in both the U.S. and several foreign jurisdictions. Significant judgments and estimates by management are required in determining the consolidated income tax expense assessment.  Deferred income tax assets and liabilities are determined based on differences between financial reporting and tax basis of assets and liabilities, and are measured using the enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. In evaluating the Company’s ability to recover its deferred tax assets within the jurisdiction from which they arise, the Company considers all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax planning strategies and recent financial operations. In projecting future taxable income, the Company begins with historical results and changes in accounting policies, and incorporates assumptions including the amount of future state, federal and foreign pre-tax operating income, the reversal of temporary differences, and the implementation of feasible and prudent tax planning strategies. These assumptions require significant judgment and estimates by management about the forecasts of future taxable income and are consistent with the plans and estimates the Company uses to manage the underlying businesses. In evaluating the objective evidence that historical results provide, the Company considers three years of cumulative operating income and/or loss. Valuation allowances are established when necessary to reduce deferred income tax assets to an amount more likely than not to be realized. The Company established a valuation allowance of $78,100 related to its foreign tax credit carry-forward at April 30, 2017. The Company did no t change the previous valuation allowance or establish any new valuation allowances at January 31, 2018.
Reclassifications	Reclassifications - Certain reclassifications have been made to the previously reported 2017 financial statements to conform to the 2018 presentation. There was no change to net income.
New Accounting Standards	New Accounting Standards:  In May 2014, the FASB issued Accounting Standards Update (“ASU”) No. 2014-09, "Revenue from Contracts with Customers" (Topic 606) which supersedes the revenue recognition requirements in ASC 605, “ Revenue Recognition” . In summary, the core principle of this standard, along with various subsequent amendments, is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Additionally, the new standard requires enhanced disclosures about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts, including revenue recognition policies to identify performance obligations, assets recognized from costs incurred to obtain and fulfill a contract, and significant judgments in measurements and recognition. The standard, as amended, will be effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. Companies have the option of using either a full or modified retrospective approach in applying this standard. The Company, along with its third-party advisor, is currently in the process of finalizing its analysis to determine the impact the new standard will have on its consolidated financial statements. This analysis includes reviewing 1) contract terms and existing accounting policies to determine the financial impact of the standard, 2) data availability and system reports to meet the additional disclosure requirements of the standard, 3) any practical expedients the Company will elect upon adoption and 4) the control environment and internal processes to ensure the appropriate controls are in place. The Company is specifically evaluating the impact that adoption of the new revenue recognition standard may have on its accounting for manufactured finished goods for which the Company’s performance obligation has been fulfilled but that have not yet been shipped to the customer. The Company’s adoption of ASC 606 may result in accelerated recognition of revenue as compared to our current policy. The Company is continuing its evaluation of this issue and anticipates reaching a conclusion during the fourth quarter of fiscal year ending April 30, 2018. The Company will adopt the ASU effective the first quarter of fiscal year ending April 30, 2019 and expects using the modified retrospective transition method , which may result in a significant transition adjustment to retained earnings for the cumulative effect of applying the new standard as of the effective date. The Company expects that the disclosures in the notes to its consolidated financial statements related to revenue recognition will be expanded under the new standards. As the Company continues to assess all potential impacts of the standard, any preliminary conclusions are subject to change.  Note H - Critical Accounting Policies - Continued  In February 2016, the FASB issued ASU No. 2016-02, “ Leases” . The new standard establishes a right-of-use (ROU) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach is required for capital leases and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. While the Company is still evaluating the impact of its pending adoption of the new standard on its consolidated financial statements, the Company expects that upon adoption in the fiscal year ending April 30, 2020, it will recognize ROU assets and lease liabilities and that the amounts could be material.  In March 2016, the FASB issued ASU No. 2016-09, “ Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting”, a new accounting standard update intended to simplify several aspects of the accounting for share-based payment transactions including: income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. Specifically, the update requires that excess tax benefits and tax deficiencies (the difference between the deduction for tax purposes and the compensation cost recognized for financial reporting purposes) be recognized as income tax expense or benefit in the Consolidated Statements of Income, introducing a new element of volatility to the provision for income taxes. This update is effective for fiscal years beginning after December 15, 2016. Early adoption is permitted. The Company adopted the ASU on May 1, 2017. Effective with the adoption of the ASU all share-based awards continue to be accounted for as equity awards, excess tax benefits recognized on stock-based compensation expense are reflected in the consolidated statements of income as a component of the provision for income taxes on a prospective basis, excess tax benefits recognized on stock-based compensation expense are classified as an operating activity in the consolidated statements of cash flows on a prospective basis and the Company has elected to continue to estimate expected forfeitures over the course of a vesting period. The adoption of the ASU had no impact on the retained earnings, other components of equity or net assets as of the beginning of the period of adoption.  In June 2016, the FASB issued ASU No. 2016-13, “ Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments .” ASU 2016-13 introduces a new forward-looking approach, based on expected losses, to estimate credit losses on certain types of financial instruments, including trade receivables. The estimate of expected credit losses will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. This ASU also expands the disclosure requirements to enable users of financial statements to understand the entity’s assumptions, models and methods for estimating expected credit losses. For public business entities, ASU 2016-13 is effective for annual and interim reporting periods beginning after December 15, 2019, and the guidance is to be applied using the modified-retrospective approach. Earlier adoption is permitted for annual and interim reporting periods beginning after December 15, 2018. The Company is currently evaluating the new guidance and has not determined the impact this ASU may have on its consolidated financial statements.  Note H - Critical Accounting Policies – Continued  In August 2016, the FASB issued ASU Update No. 2016-15, “Statement of Cash Flows- Classification of Certain Cash Receipts and Cash Payments, ” which is intended to reduce diversity in practice in how certain transactions are classified in the statements of cash flows. This update will be effective for fiscal years beginning after December 15, 2017 (the Company’s fiscal year ending April 30, 2019), and interim periods within those fiscal years. Early adoption is permitted, provided that all of the amendments are adopted in the same period. The guidance requires application using a retrospective transition method. The Company plans to adopt the ASU in its fiscal year ending April 30, 2019. The Company does not expect the impact of the adoption of this ASU to have a material impact on the Company’s Consolidated Statements of Cash Flows.  In January 2017, the FASB issued ASU No. 2017-04, “ Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment ,” which removes the step 2 requirement to perform a hypothetical purchase price allocation to measure goodwill impairment. Goodwill impairment will now be the amount by which a reporting unit's carrying value exceeds its fair value, not to exceed the recorded amount of goodwill. This guidance is effective for public companies for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019, and early adoption is permitted. The Company decided to early adopt this guidance in the third quarter of its fiscal year ending April 30, 2018 and will apply this guidance to all future tests, including its February 1, 2018 annual impairment test.  In January 2017, the FASB issued ASU No. 2017-01, “ Business Combinations (Topic 805): Clarifying the Definition of a Business ,” which clarifies the definition of a business when evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. For public companies, this ASU is effective for annual periods beginning after December 15, 2017, including interim periods within those periods. The Company plans to adopt this ASU in the first quarter of its fiscal year ending April 30, 2019. The Company will apply the clarified definition of a business, as applicable, from the period of adoption.  In February 2018, the FASB issued ASU No. 2018-02, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” The guidance permits entities to reclassify tax effects stranded in AOCI as a result of tax reform to retained earnings. This new guidance is effective for annual and interim periods in fiscal years beginning after December 15, 2018. Early adoption is permitted in annual and interim periods and can be applied retrospectively or in the period of adoption. The Company plans to adopt this ASU in the first quarter of its fiscal year ending April 30, 2019 and is currently evaluating the impact that its adoption may have on its consolidated financial statements.

Inventories, Net (Tables)

Inventories, Net (Tables)	9 Months Ended
	Jan. 31, 2018
Inventories, Net [Abstract]
Components Of Inventory	   January 31, April 30,  2018 2017   Finished products $ 21,428,423 $ 20,291,768  Work-in-process 1,829,670 1,795,852  Raw materials 64,221,145 52,748,542  87,479,238 74,836,162  Less excess and obsolescence reserve (1,221,718) (1,264,924)  $ 86,257,520 $ 73,571,238 

Earnings Per Share And Stockh17

Earnings Per Share And Stockholders' Equity (Tables)	9 Months Ended
	Jan. 31, 2018
Earnings Per Share And Stockholders' Equity [Abstract]
Computation Of Basic And Diluted Earnings Per Share	  Three Months Ended Six Months Ended  January 31, January 31,  2018 2017 2018 2017   Net income (loss) $ 31,338 $ (47,852) $ 1,150,335 $ 132,040  Weighted-average shares  Basic 4,209,566 4,186,813 4,202,331 4,185,507  Effect of dilutive stock options 146,943 - 122,866 37,888   Diluted 4,356,509 4,186,813 4,325,197 4,223,395   Basic earnings per share $ 0.01 $ (0.01) $ 0.27 $ 0.03   Diluted earnings per share $ 0.01 $ (0.01) $ 0.27 $ 0.03 

Goodwill And Intangible Assets

Goodwill And Intangible Assets (Tables)	9 Months Ended
	Jan. 31, 2018
Goodwill And Intangible Assets [Abstract]
Summary Of Intangible Assets Subject To Amortization	Intangible assets subject to amortization are summarized as of January 31, 2018 as follows:    Weighted Average  Remaining Gross  Amortization Carrying Accumulated  Period (Years) Amount Amortization   Other intangible assets – Able - $ 375,000 $ 375,000  Customer relationships – Able - 2,395,000 2,395,000  Spitfire:  Non-contractual customer relationships 9.33 4,690,000 1,516,220  Backlog - 22,000 22,000  Trade names 14.33 980,000 277,644  Non-compete agreements 1.33 50,000 40,460  Patents - 400,000 400,000  Total $ 8,912,000 $ 5,026,324   Note E - Goodwill and Other Intangible Assets - Continued  Intangible assets subject to amortization are summarized as of April 30, 2017, as follows:      Weighted Average  Remaining Gross  Amortization Carrying Accumulated  Period (Years) Amount Amortization   Other intangible assets – Able - $ 375,000 $ 375,000  Customer relationships – Able - 2,395,000 2,395,000  Spitfire:  Non-contractual customer relationships 10.08 4,690,000 1,237,410  Backlog - 22,000 22,000  Trade names 15.08 980,000 240,897  Non-compete agreements 2.08 50,000 35,105  Patents 0.08 400,000 393,353  Total $ 8,912,000 $ 4,698,765 
Estimated Aggregate Amortization Expense	   For the remaining 3 months of the fiscal year ending April 30: 2018 $ 107,484  For the fiscal years ending April 30: 2019 423,721  2020 411,406  2021 403,199  2022 395,578  Thereafter 2,144,288  $ 3,885,676 

Inventories, Net (Components Of

Inventories, Net (Components Of Inventory) (Details) - USD ($)	Jan. 31, 2018	Apr. 30, 2017
Inventories, Net [Abstract]
Finished products	$ 21,428,423	$ 20,291,768
Work-in-process	1,829,670	1,795,852
Raw materials	64,221,145	52,748,542
Total inventory, gross	87,479,238	74,836,162
Less excess and obsolescence reserve	(1,221,718)	(1,264,924)
Total inventory, net	$ 86,257,520	$ 73,571,238

Earnings Per Share And Stockh20

Earnings Per Share And Stockholders' Equity (Narrative) (Details) - USD ($)	Oct. 01, 2016	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Earnings Per Share And Stockholders' Equity [Line Items]
Common stock shares were outstanding		347,318	366,763	347,318	366,763
Options granted				0	0
Stock option expense		$ 0	$ 82,759	$ 83,659	$ 249,163
Balance of unrecognized compensation expense related to stock options plans		$ 0	$ 163,720	$ 0	163,720
Restricted stock expense					$ 40,762
Anti-dilutive common stock outstanding excluded from the calculation of diluted earnings per share		0	29,149	0	0
Employee Stock Purchase Plan [Member]
Earnings Per Share And Stockholders' Equity [Line Items]
Shares of common stock for issuance		500,000		500,000
Additional shares of common stock for issuance each fiscal year				25,000
ESPP termination date				Aug. 15, 2016
ESPP final purchase date				Aug. 31, 2016
ESPP compensation expense		$ 0	$ 0	$ 0	$ 3,559
Stockholders' equity relating to purchases under the ESPP		0	0	0	8,347
Restricted Stock [Member] | 2013 Non-Employee Director Restricted Stock Plan [Member]
Earnings Per Share And Stockholders' Equity [Line Items]
Shares of restricted stock granted	11,250
Restricted stock, fully vest date	Apr. 1, 2017
Restricted stock expense		$ 0	$ 30,488	$ 0	$ 40,762

Earnings Per Share And Stockh21

Earnings Per Share And Stockholders' Equity (Computation Of Basic And Diluted Earnings Per Share) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Earnings Per Share And Stockholders' Equity [Abstract]
Net income (loss)	$ 31,338	$ (47,852)	$ 1,150,335	$ 132,040
Weighted average shares, Basic	4,209,566	4,186,813	4,202,331	4,185,507
Weighted-average shares, Effect of dilutive stock options	146,943		122,866	37,888
Weighted-average shares, Diluted	4,356,509	4,186,813	4,325,197	4,223,395
Basic earnings per share	$ 0.01	$ (0.01)	$ 0.27	$ 0.03
Diluted earnings per share	$ 0.01	$ (0.01)	$ 0.27	$ 0.03

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Details)

Feb. 12, 2018CNY (¥)

Dec. 21, 2017USD ($)

Oct. 01, 2017USD ($)

Jun. 01, 2017USD ($)

Mar. 31, 2017USD ($)

Mar. 24, 2017CNY (¥)

Feb. 01, 2017USD ($)

Nov. 01, 2016USD ($)

Aug. 04, 2015CNY (¥)

Nov. 24, 2014USD ($)

Oct. 24, 2013USD ($)

Jan. 08, 2010USD ($)

Jan. 31, 2018USD ($)

Jan. 31, 2018USD ($)

Jul. 31, 2015USD ($)

Jun. 30, 2017USD ($)

Jul. 31, 2017USD ($)

Apr. 30, 2017USD ($)

Associated Bank, National Association [Member] | Capital Lease Obligations [Member]

Debt Instrument [Line Items]

Total equipment purchased under the capital lease

$ 6,893,596

Outstanding amount under capital lease

$ 3,269,797

$ 3,269,797

$ 3,627,760

Net book value of capital leased assets

4,941,712

4,941,712

4,713,044

CIT Finance LLC [Member] | Capital Lease Obligations [Member]

Debt Instrument [Line Items]

Total equipment purchased under the capital lease

$ 2,512,051

Outstanding amount under capital lease

1,102,655

1,102,655

1,448,269

Net book value of capital leased assets

1,789,022

1,789,022

1,946,026

First American Equipment Finance [Member] | Capital Sales Leaseback Agreement [Member]

Debt Instrument [Line Items]

Total equipment purchased under the capital lease

2,263,412

Outstanding amount under capital lease

2,083,514

2,083,514

Net book value of capital leased assets

2,137,388

2,137,388

Wells Fargo Bank [Member] | Notes Payable - Buildings [Member] | Corporate Headquarters And Manufacturing Facility [Member]

Debt Instrument [Line Items]

Mortgage agreement, amount

$ 2,500,000

Mortgage agreement, final payment

$ 2,289,500

Mortgage agreement, maturity date

Nov. 8, 2019

Mortgage agreement, monthly principal payment

$ 9,500

Mortgage agreement, payable period

60 months

Wells Fargo Bank [Member] | Notes Payable - Buildings [Member] | Corporate Headquarters And Manufacturing Facility [Member] | Proceeds From U.S. Bank Mortgage Agreement [Member]

Debt Instrument [Line Items]

Mortgage agreement, amount repaid

$ 2,498,500

Wells Fargo Bank [Member] | Notes Payable - Buildings [Member] | Engineering And Design Center [Member]

Debt Instrument [Line Items]

Mortgage agreement, amount

$ 1,275,000

Mortgage agreement, interest rate

4.50%

Mortgage agreement, final payment

$ 1,030,000

Mortgage agreement, maturity date

Oct. 1, 2018

Mortgage agreement, monthly principal payment

$ 4,250

Mortgage agreement, payable period

60 months

Wells Fargo Bank [Member] | Notes Payable - Buildings [Member] | Engineering And Design Center [Member] | Proceeds From U.S. Bank Mortgage Agreement [Member]

Debt Instrument [Line Items]

Mortgage agreement, amount repaid

1,062,500

Wells Fargo Bank [Member] | LIBOR [Member] | Notes Payable - Buildings [Member] | Corporate Headquarters And Manufacturing Facility [Member]

Debt Instrument [Line Items]

Mortgage agreement, interest rate

2.25%

U.S. Bank [Member] | Notes Payable - Buildings [Member] | Corporate Headquarters And Manufacturing Facility [Member]

Debt Instrument [Line Items]

Deferred financing costs

62,650

62,650

Unamortized amount included in other assets

60,240

$ 60,240

Mortgage agreement, amount

5,200,000

Mortgage agreement, final payment

$ 4,347,778

Mortgage agreement, maturity date

Mar. 31, 2022

Mortgage agreement, monthly principal payment

17,333

Mortgage agreement, payable period

51 months

Outstanding amount

5,200,000

$ 5,200,000

U.S. Bank [Member] | Notes Payable - Buildings [Member] | Engineering And Design Center [Member]

Debt Instrument [Line Items]

Deferred financing costs

54,303

54,303

Unamortized amount included in other assets

52,215

52,215

Mortgage agreement, amount

$ 1,800,000

Mortgage agreement, interest rate

4.00%

Mortgage agreement, final payment

$ 1,505,000

Mortgage agreement, maturity date

Mar. 31, 2022

Mortgage agreement, monthly principal payment

$ 6,000

Mortgage agreement, payable period

51 months

Outstanding amount

$ 1,800,000

$ 1,800,000

U.S. Bank [Member] | LIBOR [Member] | Notes Payable - Buildings [Member] | Corporate Headquarters And Manufacturing Facility [Member]

Debt Instrument [Line Items]

Mortgage agreement, interest rate

4.00%

U.S. Bank [Member] | Senior Secured Credit Facility [Member] | Notes Payable - Banks [Member]

Debt Instrument [Line Items]

Credit facility credit limit

$ 35,000,000

Expiration date

Mar. 31, 2022

Fixed interest rate

4.00%

Variable interest rate

1.50%

Effective interest rate

3.204%

3.204%

Deferred financing costs

$ 34,971

207,647

Unamortized amount included in other assets

$ 204,789

$ 204,789

204,186

Outstanding balance under the credit facility

31,446,765

31,446,765

23,178,429

Unused availability under the credit facility

3,553,235

3,553,235

11,821,571

Engencap Fin S.A. DE C.V. [Member] | Notes Payable - Equipment 1 [Member] | Equipment [Member]

Debt Instrument [Line Items]

Fixed interest rate

6.65%

Secured note agreement amount

$ 596,987

Term extended agreement date

Nov. 1, 2021

Average quarterly payment under secured note agreement

$ 35,060

Secured note agreement, first payment date

Feb. 1, 2017

Outstanding amount under note agreement

477,590

477,590

567,138

Engencap Fin S.A. DE C.V. [Member] | Notes Payable - Equipment 2 [Member] | Equipment [Member]

Debt Instrument [Line Items]

Fixed interest rate

7.35%

Secured note agreement amount

$ 335,825

Term extended agreement date

Feb. 1, 2022

Average quarterly payment under secured note agreement

$ 20,031

Secured note agreement, first payment date

May 1, 2017

Outstanding amount under note agreement

285,451

285,451

335,825

Engencap Fin S.A. DE C.V. [Member] | Notes Payable - Equipment 3 [Member] | Equipment [Member]

Debt Instrument [Line Items]

Fixed interest rate

7.35%

Secured note agreement amount

$ 636,100

Term extended agreement date

Jun. 1, 2022

Average quarterly payment under secured note agreement

$ 37,941

Secured note agreement, first payment date

Sep. 1, 2017

Outstanding amount under note agreement

572,490

572,490

Engencap Fin S.A. DE C.V. [Member] | Notes Payable - Equipment 4 [Member] | Equipment [Member]

Debt Instrument [Line Items]

Fixed interest rate

7.35%

Secured note agreement amount

$ 307,036

Term extended agreement date

Nov. 1, 2022

Average quarterly payment under secured note agreement

$ 18,314

Secured note agreement, first payment date

Feb. 1, 2018

Outstanding amount under note agreement

$ 307,036

307,036

Minimum [Member] | Associated Bank, National Association [Member] | Capital Lease Obligations [Member]

Debt Instrument [Line Items]

Lease financing agreement date

Sep. 1, 2018

Payments under capital lease

$ 1,455

Fixed interest rate under capital lease

3.75%

Minimum [Member] | CIT Finance LLC [Member] | Capital Lease Obligations [Member]

Debt Instrument [Line Items]

Lease financing agreement date

Mar. 1, 2019

Payments under capital lease

$ 1,931

Fixed interest rate under capital lease

5.65%

Minimum [Member] | First American Equipment Finance [Member] | Capital Sales Leaseback Agreement [Member]

Debt Instrument [Line Items]

Lease financing agreement date

Aug. 1, 2021

Payments under capital lease

$ 8,198

8,198

Fixed interest rate under capital lease

5.82%

Maximum [Member] | Associated Bank, National Association [Member] | Capital Lease Obligations [Member]

Debt Instrument [Line Items]

Lease financing agreement date

May 1, 2022

Payments under capital lease

$ 40,173

Fixed interest rate under capital lease

4.90%

Maximum [Member] | CIT Finance LLC [Member] | Capital Lease Obligations [Member]

Debt Instrument [Line Items]

Lease financing agreement date

Jul. 1, 2020

Payments under capital lease

$ 12,764

Fixed interest rate under capital lease

6.50%

Maximum [Member] | First American Equipment Finance [Member] | Capital Sales Leaseback Agreement [Member]

Debt Instrument [Line Items]

Lease financing agreement date

Jan. 1, 2022

Payments under capital lease

$ 20,093

$ 20,093

Fixed interest rate under capital lease

7.00%

Wujiang SigmaTron Electronics Co [Member] | Foreign Subsidiaries [Member] | China Construction Bank [Member] | Credit Facility [Member] | Notes Payable - Banks [Member]

Debt Instrument [Line Items]

Credit facility credit limit | ¥

¥ 5,000,000

Expiration date

Aug. 3, 2017

Closed credit facility date

Mar. 1, 2017

Fixed interest rate

6.67%

SigmaTron Electronic Technology Co [Member] | Foreign Subsidiaries [Member] | China Construction Bank [Member] | Credit Facility [Member] | Notes Payable - Banks [Member]

Debt Instrument [Line Items]

Credit facility credit limit | ¥

¥ 9,000,000

Expiration date

Feb. 7, 2018

Closed credit facility date

Feb. 11, 2018

Fixed interest rate

6.09%

Outstanding balance under the credit facility

$ 0

$ 0

$ 0

SigmaTron Electronic Technology Co [Member] | Foreign Subsidiaries [Member] | China Construction Bank [Member] | Credit Facility [Member] | Notes Payable - Banks [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Credit facility credit limit | ¥

¥ 5,000,000

Expiration date

Feb. 7, 2019

Fixed interest rate

6.09%

Goodwill And Intangible Asset23

Goodwill And Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017	Apr. 30, 2017	May 31, 2012
Goodwill [Line Items]
Changes in goodwill carrying amount	$ 0	$ 0	$ 0	$ 0
Goodwill	3,222,899	3,222,899	3,222,899	3,222,899	$ 3,222,899
Amortization expense	107,484	122,865	$ 327,559	367,145
Fully amortized year			2,032
Adjustment on contingent consideration liability			$ (15,247)	(106,519)
Spitfire [Member]
Goodwill [Line Items]
Estimated fair value of contingent consideration						$ 2,320,000
Adjustment on contingent consideration liability					(353,591)
Quarterly payment for business acquisition	175,270	$ 217,242	175,270	$ 217,242
Contingent consideration liability	$ 333,302		$ 333,302		$ 523,818

Goodwill And Intangible Asset24

Goodwill And Intangible Assets (Summary Of Intangible Assets Subject To Amortization) (Details) - USD ($)	9 Months Ended	12 Months Ended
	Jan. 31, 2018	Apr. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 8,912,000	$ 8,912,000
Accumulated Amortization	5,026,324	4,698,765
Able [Member] | Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	375,000	375,000
Accumulated Amortization	375,000	375,000
Able [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,395,000	2,395,000
Accumulated Amortization	$ 2,395,000	$ 2,395,000
Spitfire [Member] | Non-Contractual Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	9 years 3 months 29 days	10 years 29 days
Gross Carrying Amount	$ 4,690,000	$ 4,690,000
Accumulated Amortization	1,516,220	1,237,410
Spitfire [Member] | Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	22,000	22,000
Accumulated Amortization	$ 22,000	$ 22,000
Spitfire [Member] | Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	14 years 3 months 29 days	15 years 29 days
Gross Carrying Amount	$ 980,000	$ 980,000
Accumulated Amortization	$ 277,644	$ 240,897
Spitfire [Member] | Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	1 year 3 months 29 days	2 years 29 days
Gross Carrying Amount	$ 50,000	$ 50,000
Accumulated Amortization	40,460	$ 35,105
Spitfire [Member] | Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period		29 days
Gross Carrying Amount	400,000	$ 400,000
Accumulated Amortization	$ 400,000	$ 393,353

Goodwill And Intangible Asset25

Goodwill And Intangible Assets (Estimated Aggregate Amortization Expense) (Details) - USD ($)	Jan. 31, 2018	Apr. 30, 2017
Goodwill And Intangible Assets [Abstract]
For the remaining 9 months of the fiscal year ending April 30, 2018	$ 107,484
For the fiscal year ending April 30, 2019	423,721
For the fiscal year ending April 30, 2020	411,406
For the fiscal year ending April 30, 2021	403,199
For the fiscal year ending April 30, 2022	395,578
Thereafter	2,144,288
Total	$ 3,885,676	$ 4,213,235

Income Tax (Narrative) (Details

Income Tax (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017	Dec. 31, 2018	Apr. 30, 2018	Dec. 31, 2017
Income Tax [Line Items]
Income tax (benefit) expense	$ (147,210)	$ 136,888	$ 466,092	$ 210,470
Effective income tax rate	127.00%	153.74%	28.80%	61.45%
Federal tax rate							34.00%
Discrete tax expense	$ 58,000
Provisional income tax expense	510,000
Deferred tax liability		$ 0		$ 0
Provisional income tax expense, foreign subsidiaries	568,000		$ 568,000
Long-term liability related to Tax Act	$ 95,000		$ 95,000
Subsequent Event [Member]
Income Tax [Line Items]
Federal tax rate						30.40%
Scenario, Plan [Member]
Income Tax [Line Items]
Federal tax rate					21.00%

Critical Accounting Policies (N

Critical Accounting Policies (Narrative) (Details) - USD ($)	Feb. 01, 2017	Jan. 31, 2018	Jan. 31, 2018	Apr. 30, 2017
Summary Of Critical Accounting Policies [Line Items]
Goodwill impairment	$ 0	$ 0	$ 0
Long-lived assets impairment			$ 0
Cumulative operating income/loss, in years			3 years
Valuation allowances		$ 0	$ 0	$ 78,100
Patents [Member]
Summary Of Critical Accounting Policies [Line Items]
Estimated useful life			5 years
Trade Names [Member]
Summary Of Critical Accounting Policies [Line Items]
Estimated useful life			20 years
Backlog [Member]
Summary Of Critical Accounting Policies [Line Items]
Estimated useful life			1 year
Non-Compete Agreements [Member]
Summary Of Critical Accounting Policies [Line Items]
Estimated useful life			7 years
Customer Relationships [Member]
Summary Of Critical Accounting Policies [Line Items]
Estimated useful life			15 years

Related Parties (Narrative) (De

Related Parties (Narrative) (Details)	Dec. 06, 2016	Jan. 29, 2016USD ($)$ / shares	Jan. 31, 2018USD ($)	Feb. 28, 2018USD ($)	Oct. 31, 2017USD ($)	Aug. 25, 2017USD ($)	Jul. 31, 2017USD ($)	Apr. 30, 2017USD ($)	Mar. 31, 2015employee
Related Party Transaction [Line Items]
Outstanding note receivable from related parties			$ 1,500,000					$ 888,000
Outstanding account receivable from related parties			1,370,000					1,271,000
Inventory on hand from related parties			209,000					$ 310,000
Note receivable from related parties							$ 887,531
Warrants from related parties							0
Embedded derivative from related parties							$ 0
Gain or loss on the extinguishment			$ 0
Extended Forbearance And Maturity [Member] | Subsequent Event [Member] | Monthly [Member]
Related Party Transaction [Line Items]
Fund to related parties				$ 105,000
Promissory Note [Member]
Related Party Transaction [Line Items]
Conversion of accounts receivable into a notes receivable		$ 888,000
Interest rate		8.00%
Maturity date		Oct. 31, 2016
Maturity within number of days after obtains equity financing by related parties		10 days
Warrants period		10 years
Warrants exercise price, per share | $ / shares		$ 0.01
Promissory Note [Member] | Extended Maturity [Member]
Related Party Transaction [Line Items]
Maturity date	Jul. 31, 2017
Promissory Note [Member] | Extended Interest Rate [Member]
Related Party Transaction [Line Items]
Interest rate	8.00%
Promissory Note [Member] | Forbearance Agreement [Member]
Related Party Transaction [Line Items]
Interest rate					8.00%
Maturity date			Oct. 31, 2017
Related parties business be sold at a price exceeding						$ 5,000,000
Fund to related parties					$ 315,000
Executive [Member]
Related Party Transaction [Line Items]
Number of executive officers invested in a start-up customer | employee									2
Minimum [Member] | Promissory Note [Member]
Related Party Transaction [Line Items]
Percentage of warrants exercised on equity securities with related parties		1.00%
Maximum [Member] | Executive [Member]
Related Party Transaction [Line Items]
Executive officers' investment holding, percentage									2.00%