Elecsys 10-Q 15 Dec 14 2015 Q2 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	6 Months Ended
	Oct. 31, 2014	Dec. 01, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	ELECSYS CORP
Document Type	10-Q
Current Fiscal Year End Date	-26
Entity Common Stock, Shares Outstanding		3,827,658
Amendment Flag	FALSE
Entity Central Index Key	914398
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Well-known Seasoned Issuer	No
Document Period End Date	31-Oct-14
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Revenues	$6,478	$7,330	$13,149	$14,104
Cost of revenues	4,149	4,301	8,371	8,868
Gross margin	2,329	3,029	4,778	5,236
Selling, general and administrative expenses:
Research and development expense	550	498	1,079	924
Selling and marketing expense	696	659	1,316	1,166
General and administrative expense	896	756	1,735	1,577
Total selling, general and administrative expenses	2,142	1,913	4,130	3,667
Operating income	187	1,116	648	1,569
Interest expense	-13	-14	-27	-28
Other income, net		-3		-4
	-13	-17	-27	-32
Net income before income tax expense	174	1,099	621	1,537
Income tax expense	94	446	268	620
Net income	$80	$653	$353	$917
Basic (in Dollars per share)	$0.02	$0.17	$0.09	$0.24
Diluted (in Dollars per share)	$0.02	$0.17	$0.09	$0.23
Basic (in Shares)	3,827	3,860	3,826	3,877
Diluted (in Shares)	3,964	3,937	3,969	3,942

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) (USD $)	Oct. 31, 2014	Apr. 30, 2014
Current assets:
Cash and cash equivalents	$1,993,000	$1,398,000
Accounts receivable, less allowances of $63 and $78, respectively	2,956,000	3,782,000
Inventories, net	7,884,000	7,544,000
Prepaid expenses	166,000	171,000
Income tax receivable		50,000
Deferred taxes	664,000	644,000
Total current assets	13,663,000	13,589,000
Property and equipment:
Land	1,737,000	1,737,000
Building and improvements	3,395,000	3,395,000
Equipment	4,123,000	4,050,000
Total property and equipment, gross	9,255,000	9,182,000
Accumulated depreciation	-3,918,000	-3,735,000
Total property and equipment, net	5,337,000	5,447,000
Goodwill	1,942,000	1,942,000
Intangible assets, net	1,382,000	1,483,000
Other assets, net	42,000	43,000
Total assets	22,366,000	22,504,000
Current liabilities:
Accounts payable	1,068,000	1,044,000
Accrued expenses	1,487,000	2,114,000
Income taxes payable	94,000	11,000
Current maturities of long-term debt	190,000	189,000
Total current liabilities	2,839,000	3,358,000
Deferred taxes	729,000	755,000
Long-term debt, less current maturities	2,334,000	2,430,000
Stockholders' equity:
Preferred stock, $.01 par value, 5,000,000 shares authorized; issued and outstanding – none
Common stock, $.01 par value, 10,000,000 shares authorized; outstanding – 3,826,558 at October 31, 2014 and 3,820,041 at April 30, 2014	40,000	40,000
Additional paid-in capital	11,847,000	11,697,000
Treasury stock, at cost; 158,181 shares at October 31, 2014 and April 30, 2014	-985,000	-985,000
Retained earnings	5,562,000	5,209,000
Total stockholders' equity	16,464,000	15,961,000
Total liabilities and stockholders' equity	$22,366,000	$22,504,000

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $)	Oct. 31, 2014	Apr. 30, 2014
In Thousands, except Share data, unless otherwise specified
Accounts receivable, allowances (in Dollars)	$63	$78
Preferred stock, par value (in Dollars per share)	$0.01	$0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share)	$0.01	$0.01
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares outstanding	3,826,558	3,820,041
Treasury stock, shares	158,181	158,181

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Stockholders' Equity (Current Period Unaudited) (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Total
Balance at Apr. 30, 2013	$40,000	$11,429,000	($282,000)	$2,742,000	$13,929,000
Balance (in Shares) at Apr. 30, 2013	3,898,000
Net income (loss)				2,467,000	2,467,000
Exercise of stock options		76,000			76,000
Exercise of stock options (in Shares)	17,000
Issue of restricted stock (in Shares)	4,000
Stock repurchases			-703,000		-703,000
Stock repurchases (in Shares)	-99,000
Share-based compensation expense		192,000			192,000
Balance at Apr. 30, 2014	40,000	11,697,000	-985,000	5,209,000	15,961,000
Balance (in Shares) at Apr. 30, 2014	3,820,000
Net income (loss)				353,000	353,000
Exercise of stock options		8,000			8,000
Exercise of stock options (in Shares)	2,000				1,763
Issue of restricted stock (in Shares)	5,000
Share-based compensation expense		142,000			142,000
Balance at Oct. 31, 2014	$40,000	$11,847,000	($985,000)	$5,562,000	$16,464,000
Balance (in Shares) at Oct. 31, 2014	3,827,000

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Cash Flows from Operating Activities:
Net income	$353,000	$917,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Share-based compensation expense	142,000	93,000
Depreciation	201,000	190,000
Amortization	103,000	103,000
Provision for doubtful accounts	-15,000	38,000
Deferred income taxes	-46,000	2,000
Gain on sales of equipment	-1,000
Changes in operating assets and liabilities:
Accounts receivable	841,000	-262,000
Inventories	-340,000	-2,209,000
Income tax payable/receivable	133,000	387,000
Accounts payable	24,000	610,000
Accrued expenses	-627,000	6,000
Other	6,000	-46,000
Net cash provided by (used in) operating activities	774,000	-171,000
Cash Flows from Investing Activities:
Purchases of property and equipment	-94,000	-230,000
Proceeds from sales of equipment	2,000
Net cash used in investing activities	-92,000	-230,000
Cash Flows from Financing Activities:
Purchases of common stock for repurchase program		-484,000
Proceeds from the exercise of stock options	8,000	14,000
Principal payments on long-term debt	-95,000	-92,000
Net cash used in financing activities	-87,000	-562,000
Net increase (decrease) in cash and cash equivalents	595,000	-963,000
Cash and cash equivalents at beginning of period	1,398,000	1,464,000
Cash and cash equivalents at end of period	1,993,000	501,000
Supplemental Disclosure of Cash Flow Information:
Cash paid during the period for interest	27,000	29,000
Cash paid during the period for income taxes	$181,000	$290,000

Note_1_Nature_of_Operations_an

Note 1 - Nature of Operations and Summary of Significant Accounting Policies	6 Months Ended
	Oct. 31, 2014
Accounting Policies [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]	1.	NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANTACCOUNTING POLICIES
	Nature of Operations
	Elecsys Corporation (“the Company”) provides innovative machine to machine (“M2M”) communication technology solutions, data acquisition and management systems, and custom electronic equipment for critical industrial applications worldwide. The Company’s primary markets include energy production and distribution, agriculture, water management, transportation, and safety systems.  The Company’s products and services encompass remote monitoring, industrial data communication, mobile data acquisition, and wireless communication technologies that are deployed wherever high quality and reliability are essential. The Company develops, manufactures, and supports proprietary M2M technology and products for multiple markets and applications under several premium brand names.  In addition to its proprietary products, the Company designs and manufactures rugged and reliable custom solutions for original equipment manufacturers (“OEMs”) in a variety of industries.
	The Company’s sales are made to customers within the United States and several international markets.
	Principles of Consolidation
	The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, Elecsys International Corporation.  All significant intercompany balances and transactions have been eliminated in consolidation.
	Comprehensive Income
	The Company has no components of other comprehensive income, therefore comprehensive income equals net income.
	Fair Value of Financial Instruments
	The carrying amount of financial instruments, including cash, accounts receivable, accounts payable, and the current portion of long-term debt approximates fair value because of the short-term nature of these items.
	The carrying value of the Company’s long-term debt approximates fair value as the Industrial Revenue Bonds include a variable interest rate component.
	Recent Accounting Pronouncements
	In April 2014, the Financial Accounting Standards Board (“FASB”) revised the authoritative guidance on reporting discontinued operations.  The revised guidance specifies that a disposal of a component of an entity or a group of components of an entity is required to be reported in a discontinued operation if the disposal represents a strategic shift that has, or will have a major effect on an entity's operations and financial results.  The guidance also changes the requirements for reporting discontinued operations which requires additional disclosures for discontinued operations and new disclosures for individually material disposal transactions that do not meet the definition of a discontinued operation.  The guidance is effective for us beginning in the first quarter of fiscal 2016.  We are currently evaluating the impact this guidance may have on our financial position, results of operations and cash flows.
	In May 2014, the FASB issued Accounting Standards Update (“ASU”) No. 2014-09, "Revenue from Contracts with Customers."  This ASU is a comprehensive new revenue recognition model that requires a company to recognize revenue to depict the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. This ASU is effective for annual reporting periods beginning after December 15, 2016 and early adoption is not permitted. Accordingly, we will adopt this ASU on May 1, 2017.  Companies may use either a full retrospective or modified retrospective approach to adopt this ASU and we are currently evaluating which transition approach to use and the full impact this ASU will have on our future financial statements.
	Revenue Recognition
	The Company derives revenue from the manufacture of production units of electronic assemblies, liquid crystal displays, and its proprietary products including its remote monitoring equipment, industrial data communications equipment, and its mobile computing products.  The Company also derives revenue from repairs and non-warranty services, engineering design services, remote monitoring services and maintenance contracts.  Production and repaired units are billed to the customer when they are shipped.  Remote monitoring services and maintenance contracts are billed and the revenue recognized at the end of the month the services are provided or maintenance periods are completed.  Customers that utilize the Company’s engineering design services are billed and revenue is recognized when the design services or tooling have been completed.  The Company requires its customers to provide a binding purchase order to verify the manufacturing services to be provided.  Typically, the Company does not have any post-shipment obligations, including customer acceptance requirements.  The Company does provide training and installation services to its customers and those services are billed and the revenue recognized at the end of the month the services are completed, which is typically in the same period that the equipment is delivered.  The Company also provides an extended warranty for additional purchase price to the customer.  The Company recognizes the revenue from the extended warranties over the specific period of the warranty.  Revenue recognized is net of any sales taxes, tariffs, or duties remitted to any governmental authority.
	Accounts Receivable
	Accounts receivable are carried at original invoice amount less an estimate made for doubtful receivables based on a review of all outstanding amounts on a monthly basis. Management determines the allowance for doubtful accounts by regularly evaluating individual customer receivables, considering a customer’s financial condition and credit history, as well as current economic conditions. Receivables are written off when deemed uncollectible. Recoveries of receivables previously written off are recorded when received.  The majority of the customer accounts are considered past due after the invoice becomes older than the customer’s credit terms (30 days for the majority of customers).  Interest is not charged on past due accounts for the majority of the Company’s customers.
	Inventories
	Inventories are stated at the lower of cost, using the first-in, first-out (FIFO) method, or market value.  The Company’s industry is characterized by rapid technological change, short-term customer commitments and rapid changes in demand, as well as other market considerations.  Provisions for estimated excess and obsolete inventory are based on quarterly reviews of inventory quantities on hand and the latest forecasts of product demand and production requirements from customers.  Inventories are reviewed in detail on a quarterly basis utilizing multiple annual time horizons ranging from 24-months to 60-months.  Individual part numbers that have not been used in each of the time horizons are examined by manufacturing personnel for obsolescence, excess and market value.  Parts that are not identified for common use or are unique to a former customer or application are categorized as obsolete and are included in the provision for estimated excess and obsolete inventory.  If actual market conditions or customers’ product demands are less favorable than those projected, additional inventory write-downs may be required.
	Property and Equipment
	Property and equipment are recorded at cost.  Depreciation is computed using the straight-line method over the following estimated useful lives:
	Description		Years
	Building and improvements		39
	Equipment	3	-	8
	Goodwill
	Goodwill is initially measured as the excess of the cost of an acquired business over the fair value of the identifiable net assets acquired.  The Company does not amortize goodwill, but rather reviews its carrying value for impairment annually (January 31) and whenever an impairment indicator is identified.  The goodwill impairment test involves a two-step approach.  The first step is to identify whether potential impairment of goodwill exists. If impairment of goodwill is determined to exist, the second step of the goodwill impairment test measures the amount of the impairment using a fair value-based approach.  No impairment indicators were identified as of October 31, 2014.
	Intangible Assets
	Intangible assets consist of patents, trademarks, copyrights, customer relationships and capitalized software.  Intangible assets are amortized over their estimated useful lives using the straight-line method.  The useful lives of the Company’s intangible assets range from 5 – 15 years.
	Impairment of Long-Lived Intangible Assets
	Long-lived assets, including amortizable intangible assets, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or group of assets may not be fully recoverable. These events or changes in circumstances may include a significant deterioration of operating results, changes in business plans, or changes in anticipated future cash flows. If an impairment indicator is present, the Company evaluates recoverability by a comparison of the carrying amount of the assets to future undiscounted cash flows expected to be generated by the asset group.  If the sum of the expected future undiscounted cash flows is less than the carrying amount, the Company would recognize an impairment loss. An impairment loss would be measured by comparing the amount by which the carrying value exceeds the fair value of the long-lived assets and intangibles.
	Income Taxes
	The Company accounts for income taxes in accordance with ASC Topic 740, Income Taxes.  Deferred tax assets and liabilities are recognized for the future tax consequences attributable to the differences between the tax bases of assets and liabilities and their carrying amount for financial reporting purposes, as measured by the enacted tax rates which will be in effect when these differences are expected to reverse.  The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.  In assessing the realizability of deferred income tax assets, the Company considers whether it is “more likely than not,” according to the criteria of ASC Topic 740, that some portion or all of the deferred income tax assets will be realized.  The ultimate realization of deferred income tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible.  ASC Topic 740 requires that the Company recognize the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more likely than not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with the relevant tax authority.
	Warranty Reserve
	The Company has established a warranty reserve for rework, product warranties and customer refunds.  The Company provides a limited warranty for a period of one year from the date of receipt of products by customers and the Company offers extended warranties for additional purchase by its customers.  The standard warranties require the Company to repair or replace defective products at no cost to the customer or refund the customer’s purchase price.  The warranty reserve is based on historical experience and analysis of specific known and potential warranty issues.  The product warranty liability reflects management’s best estimate of probable liability under the product warranties.
	Shipping and Handling Costs
	Shipping and handling costs that are billed to our customers are recognized as revenues in the period that the product is shipped.  Shipping and handling costs that are incurred by the Company are recognized as cost of revenues in the period that the product is shipped.

Note_2_Basis_of_Presentation

Note 2 - Basis of Presentation	6 Months Ended
	Oct. 31, 2014
Disclosure Text Block [Abstract]
Basis of Accounting [Text Block]	2.	BASIS OF PRESENTATION
	The accompanying unaudited condensed consolidated financial statements of the Company include the accounts of the Company and its wholly owned subsidiary, Elecsys International Corporation.  All significant intercompany balances and transactions have been eliminated.  The condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles in the United States for complete financial statements.  In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.  Operating results for the three-month and six-month periods ended October 31, 2014 are not necessarily indicative of the results that may be expected for the year ending April 30, 2015.
	The balance sheet at April 30, 2014 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles in the United States for complete financial statements.
	For further information, refer to the consolidated financial statements and footnotes included in the Company’ annual report on Form 10-K for the year ended April 30, 2014.

Note_3_Intangible_Assets_and_G

Note 3 - Intangible Assets and Goodwill	6 Months Ended
	Oct. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	3.	INTANGIBLE ASSETS AND GOODWILL
	The Company’s total intangible assets consist of the following (in thousands):
						31-Oct-14					30-Apr-14
	Intangible Asset Description		Estimated			Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
			Useful
			Lives
	Patents, trademarks and copyrights		10	–	15	$	852	$	(508	)	$	852	$	(473	)
	Customer relationships		5	–	15		1,040		(544	)		1,040		(512	)
	Trade name			15			530		(253	)		530		(236	)
	Technologies			15			475		(210	)		475		(193	)
						$	2,897	$	(1,515	)	$	2,897	$	(1,414	)
	Amortization expense for the six-month periods ended October 31, 2014 and 2013 was approximately $103,000 in each respective period.
	Estimated amortization expense for the Company’s remaining intangible assets for the next five fiscal years ending April 30 is as follows (in thousands):
	Year		Amounts
	2015 (remaining)		$	76
	2016			147
	2017			147
	2018			147
	2019			147
	2020			147
	The carrying amount of the Company’s goodwill at October 31, 2014 and April 30, 2014 was approximately $1,942,000.  There were no changes in the carrying amount of goodwill for the six-month period ended October 31, 2014.

Note_4_Inventory

Note 4 - Inventory	6 Months Ended
	Oct. 31, 2014
Inventory Disclosure [Abstract]
Inventory Disclosure [Text Block]	4.	INVENTORY
	Inventories are stated at the lower of cost or market value, using the first-in, first-out (FIFO) method.  Inventories are summarized by major classification as follows (in thousands):
			31-Oct-14			30-Apr-14
	Raw material		$	3,655		$	4,057
	Work-in-process			1,086			801
	Finished goods			3,669			3,301
				8,410			8,159
	Reserves			(526	)		(615	)
			$	7,884		$	7,544

Note_5_Stockholders_Equity

Note 5 - Stockholders' Equity	6 Months Ended
	Oct. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	5.	STOCKHOLDERS’ EQUITY
	Stock Repurchase Plan
	On December 17, 2012, the Company announced a share repurchase program by which the Company planned to repurchase up to 10% of the Company’s outstanding common shares, or approximately 400,000 shares, from time to time at prevailing market prices through the open market or privately negotiated transactions.  The program has no expiration date and purchases are funded from available cash resources.
	For accounting purposes, the common stock repurchased under the Repurchase Plan is recorded based upon the settlement date of the applicable trade.  Such repurchased shares are held in treasury and are presented using the cost method.
	For the six-month period ended October 31, 2014, the Company did not repurchase any of its shares.  For the Stock Repurchase Plan to date, the Company has repurchased a total of 158,181 shares at a cost of approximately $985,000 (average cost of $6.23 per share).
	Stock-Based Compensation
	At October 31, 2014, the Company had two equity-based compensation plans from which stock-based compensation awards are granted to eligible employees and consultants of the Company.  These stock-based compensation plans include the: (i) 1991 Stock Option Plan (the “1991 Plan”) and (ii) 2010 Equity Incentive Plan (the “2010 Plan”).
	According to the terms of the Company’s original 1991 stock option plan for which the Company originally reserved 675,000 shares of common stock, both incentive stock options and non-qualified stock options to purchase common stock of the Company may be granted to key employees, directors and consultants to the Company, at the discretion of the Board of Directors. Incentive stock options were not granted at prices that were less than the fair market value on the date of grant.  Non-qualified options may be granted at prices determined appropriate by the Board of Directors of the Company, but have not been granted at less than the fair market value on the date of grant.  Generally, these options become exercisable and vest over one to five years and expire within 10 years of the date of grant.  The 1991 Plan also provides for accelerated vesting if there is a change in control of the Company.  As of October 31, 2014, there were options remaining outstanding to acquire 90,000 shares of common stock under the 1991 Plan.
	The 2010 Plan is an omnibus plan that allows for equity awards including stock options (including incentive stock options and non-qualified options), stock appreciation rights, restricted shares, restricted share units, performance shares, performance units, and other equity-based awards payable in stock to officers, directors, key employees and other service providers.  Under the 2010 Plan, the Company has the ability to grant up to 380,000 shares of common stock.  The number of shares granted to eligible participants will be determined by the Board of Directors on an annual basis based on Company and individual performance and a Compensation Committee analysis.  The awards under the 2010 Plan will include vesting provisions that will require participants (other than non-employee directors) to remain at the Company for a defined period of time.  Options and stock appreciation rights will expire 10 years after the grant date.  The 2010 Plan also includes a change of control provision which allows for accelerated vesting if there is a change of control of the Company.  As of October 31, 2014, there were options outstanding to acquire 197,537 shares of common stock and 7,286 shares of restricted common stock awards granted under the 2010 Plan.
	The Company accounts for its stock-based compensation plan in accordance with ASC Topic 718, Compensation-Stock Compensation.  ASC Topic 718 requires the measurement and recognition of compensation expense for all stock-based payment awards based on estimated fair value.  It further requires companies to estimate the fair value of stock-based payment awards on the date of the grant using an option pricing model.  The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods.
	The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model, which uses the following weighted-average assumptions for the six-month periods ended October 31, 2014 and 2013:
			Six Months				Six Months
			Ended				Ended
			31-Oct-14				31-Oct-13
	Risk-free interest rate			2.97%				2.97%
	Expected life, in years			6				6
	Expected volatility		84.47	–	84.52%		82.59	–	82.61%
	Dividend yield			0.00%				0.00%
	Forfeiture rate			11.60%				11.40%
	The Company uses historical data to estimate option exercises and employee terminations used in the model.  Expected volatility is based on monthly historical fluctuations of the Company’s common stock using the closing market value for the number of months of the expected term immediately preceding the grant.  The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of the grant for a bond with a similar term.
	The Company receives a tax deduction for certain stock option exercises and disqualifying stock dispositions generally for the excess of the price at which the options are sold over the exercise prices of the options.  In accordance with ASC Topic 718, the Company reports any tax benefit from the exercise of stock options as financing cash flows.  For the six-month period ended October 31, 2014, exercises of stock options triggered tax benefits totaling approximately $4,000.  There were no exercises of stock options which triggered tax benefits for the six-month period ended October 31, 2013.
	At October 31, 2014, there was approximately $465,000 of unrecognized compensation cost related to share-based payments that is expected to be recognized over a weighted-average period of 1.58 years.
	The following tables represent equity award activity for the six-month period ended October 31, 2014:
			Number				Weighted-				Weighted-
			of				Average				Average
	Stock Options		Shares				Exercise Price				Remaining
											Contract Life
											(Years)
	Outstanding options at April 30, 2014			255,967			$	4.93
	Granted			35,000			$	12.44
	Exercised			1,763			$	5.32
	Forfeited			1,667			$	5.86
	Outstanding options at October 31, 2014			287,537			$	5.84				6.37
	Outstanding exercisable at October 31, 2014			180,704			$	4.54				4.92
	Restricted Stock		Number
			of
			Shares
	Outstanding awards at April 30, 2014			11,146
	Granted			3,860
	Issued			5,493
	Forfeited			2,226
	Outstanding awards at October 31, 2014			7,287
	Outstanding vested at October 31, 2014			-
	Shares available for future equity awards to employees, officers, directors and consultants of the Company under the existing 1991 Plan and 2010 Plan were 27,000 and 156,350, respectively, at October 31, 2014.  At October 31, 2014 the aggregate intrinsic value of options and restricted stock outstanding was approximately $1,199,000, and the aggregate intrinsic value of exercisable options was approximately $985,000.  The Company recognized share-based compensation expense of $142,000 for the six-month period ended October 31, 2014 and $93,000 for the six-month period ended October 31, 2013.  The weighted-average fair value of the options and restricted stock granted in the six-month period ended October 31, 2014 was $9.02 per stock option and restricted stock award.
	The following table summarizes information about equity awards outstanding at October 31, 2014:
					Options Outstanding										Options Exercisable
	Range of Exercise Prices				Number				Weighted-Average Remaining Contractual Life (years)				Weighted-Average Exercise Price		Number		Weighted-Average Exercise Price
					Outstanding at										Exercisable at
					31-Oct-14										October 31, 2014
	$3.01	-	$4.00			101,250				3.78			$	3.53		85,250	$	3.62
	$4.01	-	$5.00			20,537				7.56			$	4.35		13,037	$	4.35
	$5.01	-	$6.00			113,000				7.39			$	5.53		74,667	$	5.36
	$7.01	-	$8.00			7,750				3.86			$	7.05		7,750	$	7.05
	$11.01	-	$12.00			10,000				9.08			$	11.83		-		-
	$12.01	-	$13.00			35,000				9.58			$	12.44		-		-
		Total				287,537				6.37			$	5.84		180,704	$	4.54

Note_6_Net_Income_Per_Share

Note 6 - Net Income Per Share	6 Months Ended
	Oct. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	6.	NET INCOME PER SHARE
	The following table presents the calculation of basic and diluted income per share (in thousands):
			Three Months Ended				Six Months Ended
			October 31,				October 31,
			2014		2013		2014		2013
	Numerator:
	Net income		$	80	$	653	$	353	$	917
	Denominator:
	Weighted average common shares Outstanding – basic			3,827		3,860		3,826		3,877
	Effect of dilutive options outstanding			137		77		143		65
	Weighted average common shares outstanding – diluted			3,964		3,937		3,969		3,942
	Options to purchase 45,000 and 60,000 shares of common stock for both the three-month and six-month periods ended October 31, 2014 and 2013, respectively, were anti-dilutive and therefore were not included in the computation of diluted net income per share.

Note_7_Pledged_Assets_Notes_Pa

Note 7 - Pledged Assets, Notes Payable and Long-Term Debt	6 Months Ended
	Oct. 31, 2014
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	7.	PLEDGED ASSETS, NOTES PAYABLE AND LONG-TERM DEBT
	As of October 31, 2014, the Company had two credit agreements including an operating line of credit and Industrial Revenue Bonds that are secured by its production and headquarters facility in Olathe, Kansas.
	The Company’s $6,000,000 operating line of credit provides the Company and its wholly-owned subsidiary with short-term financing for their working capital requirements. The line of credit’s borrowing capacity is calculated as a specified percentage of accounts receivable and inventory on a monthly basis and was amended on October 30, 2014 to extend the expiration date of the line of credit to October 30, 2016.  The total amount of borrowing base for the line of credit as of October 31, 2014 was approximately $5,003,000, all of which was available.  It is secured by accounts receivable and inventory and accrues interest at a performance-based rate that is based on the prime rate (3.25% at October 31, 2014) plus/minus 0.5%.  The interest rate actually assessed is determined by the Company’s debt-to-tangible net worth ratio and was 2.75% on October 31, 2014.  The loan agreement has various covenants, including a financial covenant pertaining to the maintenance of total tangible net worth and a required debt service coverage ratio.  When an amount is outstanding, the borrowings on the line of credit are presented on the balance sheet as long-term in accordance with the terms of the line of credit.
	The following table is a summary of the Company’s long-term debt and related current maturities (in thousands):
			31-Oct-14		30-Apr-14
	Industrial Revenue Bonds, Series 2006A, 5-year adjustable interest rate based on the yield on 5-year United States Treasury Notes, plus .45% (1.89% as of October 31, 2014), due in monthly principal and interest payments beginning October 1, 2006 through maturity  on September 1, 2026, secured by real estate.  Effective September 1, 2011, the 5-year adjustable interest rate was reset to 1.89% for the next five years.		$	2,524	$	2,619
	Operating line of credit, $6,000,000 limit on borrowing capacity, prime rate (3.25% at October 31, 2014) plus/minus 0.5% performance based interest, due in full on October 30, 2016, secured by accounts receivable and inventory.  The interest rate as of October 31, 2014 was 2.75%			-		-
				2,524		2,619
	Less current maturities			190		189
	Total long-term debt		$	2,334	$	2,430
	The approximate aggregate amount of principal to be paid on the long-term debt and line of credit during each of the next five fiscal years ending April 30 is as follows (in thousands):
	Year		Amount
	2015 (remaining)		$	94
	2016			192
	2017			196
	2018			200
	2019			204
	2020			208
	Thereafter			1,430
			$	2,524

Note_8_Segment_Reporting

Note 8 - Segment Reporting	6 Months Ended
	Oct. 31, 2014
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	8.	SEGMENT REPORTING
	The Company operates and measures the revenues and gross margins of two primary business segments, custom solutions for Original Equipment Manufacturers (“OEM”) and Proprietary M2M products (“Proprietary”).   The OEM solutions business segment consists primarily of custom electronic assemblies, engineering services, liquid crystal displays and data communication technologies. The Proprietary products business segment is made up of remote monitoring hardware and data services, industrial data communication solutions, and ultra-rugged handheld computers, peripherals and maintenance contract revenues.  The following table (in thousands) presents segment revenues and gross margins which the Company evaluates in determining overall operating performance and the allocation of resources.  Other segment information such as components of the Statement of Operations below the gross margin total and assets or other balance sheet information are not presented.  As the Company’s operations of the two segments are so intertwined, the Company’s chief operating decision maker (Elecsys International Corporation’s President) does not review that financial information at a segment reporting level and that information is also not readily available.
			Three Months Ended October 31, 2014
			OEM		Proprietary		Total
	Total revenues		$	3,540	$	2,938	$	6,478
	Gross margin		$	872	$	1,457	$	2,329
			Three Months Ended October 31, 2013
			OEM		Proprietary		Total
	Total revenues		$	3,588	$	3,742	$	7,330
	Gross margin		$	1,092	$	1,937	$	3,029
			Six Months Ended October 31, 2014
			OEM		Proprietary		Total
	Total revenues		$	7,845	$	5,304	$	13,149
	Gross margin		$	2,115	$	2,663	$	4,778
	Goodwill		$	-	$	1,942	$	1,942
			Six Months Ended October 31, 2013
			OEM		Proprietary		Total
	Total revenues		$	7,898	$	6,206	$	14,104
	Gross margin		$	2,076	$	3,160	$	5,236
	Goodwill		$	-	$	1,942	$	1,942
	The following table reconciles total revenues to the products and services offered by the Company (in thousands).
			Three Months Ended				Six Months Ended
			October 31,				October 31,
			2014		2013		2014		2013
	Products and services:
	OEM solutions		$	3,489	$	3,525	$	7,730	$	7,773
	Remote monitoring solutions			2,361		2,859		3,804		4,334
	Industrial data communications			249		253		546		496
	Mobile data acquisition			267		513		760		1,175
	Other services:
	OEM related services			51		63		115		125
	Proprietary product related services			61		117		194		201
	Total revenues		$	6,478	$	7,330	$	13,149	$	14,104

Note_9_Warranty

Note 9 - Warranty	6 Months Ended
	Oct. 31, 2014
Product Warranties Disclosures [Abstract]
Product Warranty Disclosure [Text Block]	9.	WARRANTY
	The Company provides a limited warranty for a period of one year from the date of a customer’s receipt of its products, or one year from the installation date for some of its products, and will also provide an extended warranty for additional purchase price to the customer.  The Company’s standard warranties require the Company to repair or replace defective products at no cost to the customer or refund the customer’s purchase price.  The Company’s product warranty liability reflects management’s best estimate of probable liability under product warranties.  Management determines the liability based on known product failures (if any), historical experience, and other currently available evidence.
	The following table presents changes in the Company’s warranty liability, which is included in accrued expenses on the balance sheets (in thousands):
			Six Months Ended October 31,
			2014			2013
	Warranty reserve balance at beginning of period		$	125		$	90
	Expense accrued, including adjustments			88			36
	Warranty costs incurred			(67	)		(36	)
	Warranty reserve balance at end of period		$	146		$	90

Note_10_Subsequent_Events

Note 10 - Subsequent Events	6 Months Ended
	Oct. 31, 2014
Subsequent Events [Abstract]
Subsequent Events [Text Block]	10.	SUBSEQUENT EVENTS
	Merger Agreement with Lindsay Corporation
	On November 4, 2014, Elecsys Corporation (the “Company”) entered into an Agreement and Plan of Merger (the “Merger Agreement” with Lindsay Corporation (“Lindsay”), a Delaware corporation and Matterhorn Merger Sub, Inc., a Kansas corporation and indirect wholly owned subsidiary of Lindsay (“Merger Sub” and, together with Lindsay, the “Parties”), pursuant to, and subject to the terms and conditions of, which Merger Sub will merge with and into the Company (the “Merger”), with the Company surviving the Merger as a wholly owned subsidiary of Lindsay.
	The Board of Directors of the Company unanimously determined that the Merger Agreement is advisable and in the best interests of the Company and its stockholders, adopted the Merger Agreement and approved its execution and the performance of the transactions contemplated thereby, and unanimously resolved to recommend that the Company’s stockholders vote to adopt and approve the Merger Agreement and the Merger.    In conjunction with the signing of the Merger Agreement, the Company has suspended the stock repurchase program it announced in December 2012.
	At the effective time of the Merger (“Effective Time”) and as a result of the Merger, each issued and outstanding share of common stock of the Company, par value $0.01 per share, including each share of restricted stock subject to restricted stock awards (each a “Share” and collectively, the “Shares”), other than (a) Shares directly owned by the Company as treasury stock, or owned by Lindsay or any of its subsidiaries, and (b) Shares subject to appraisal rights in accordance with Section 17-6712 of the Kansas General Corporation Code, will be converted into the right to receive cash in an amount equal $17.50 per Share (the “Cash Consideration”), and all issued and outstanding options to purchase Shares, whether vested or unvested (the “Options”) granted under any Company plan, arrangement or agreement will be cancelled by the Company and shall no longer be outstanding, and, in consideration for such cancellation, the holders of Options will receive a cash payment in an amount equal to the product of (x) the number of Shares subject to the Option and (y) the excess, if any, of the Cash Consideration, divided by the exercise price per Share of such Option, reduced by any income or employment tax required to be withheld with respect to such payment.
	The Merger Agreement contains certain termination rights for the Company and Lindsay, including the right of Lindsay or Company, subject to certain limitations, to terminate the Merger Agreement if the Merger is not consummated by February 28, 2015. Upon termination of the Merger Agreement under specified customary circumstances, the Company will be required to pay Lindsay a termination fee of $2,680,000 and pay Lindsay’s documented out-of-pocket expenses in an amount not to exceed $400,000.
	Sale of the RFID Product Line
	On November 4, 2014, Elecsys Corporation (the “Company”) entered into an Asset Purchase Agreement (the “Asset Purchase Agreement”) with Valid Soluções e Serviços de Segurança em Meios de Pagamento e Identificação S.A., a company organized in the state of Rio de Janeiro, in the Federative Republic of Brazil (“Valid”), and StoreID Tecnologia e Desenvolvimento, Ltda., (“StoreID”) a company organized in the state of São Paulo, in the Federative Republic of Brazil, and Flávio Oliveira Gonçalves (“Mr. Oliveira”) as consenting parties (the “Asset Purchase Agreement”).   Pursuant to the terms of the Asset Purchase Agreement (i) the Company has agreed to permanently transfer certain patents (the “Patents”) to Mr. Oliveira and Mr. Oliveira has agreed to license the use of such Patents to Valid and (ii) the Company has agreed to sell, and Valid has agreed to buy, certain assets related to the Company’s eXtremeTAG RFID products. Under the terms of the Asset Purchase Agreement, the Company will receive an initial payment of $1,000,000 which will be transferred at specific times during the transaction.  The Company is responsible for certain costs related to the physical transfer of the assets to Valid’s facility in Brazil, including packing, shipping, insurance, freight, customs fees, duties, and taxes, with these costs not to exceed $400,000.  The Company is expected to also provide on-site technical support and training to assist Valid with the start-up of production at its facility in Brazil with these costs limited to $200,000.  The Company and Valid expect to complete the transaction in approximately six (6) months.  In addition, for the five-year period commencing on the first day of the month following the closing of the transaction, Valid has agreed to pay the Company an amount equal to five percent (5%) of the net sales revenue of all sales of RFID products to  customers, including any related or subsequently developed technologies, received by Valid.  For the three-month and six-month periods ended October 31, 2014 there was no revenue or net income generated from the RFID product line.  For the three-month and six-month periods ended October 31, 2013, there was net income of $3,000 and $4,000, respectively, generated from the RFID product line.  It is currently estimated that the net financial impact of the sale of the RFID assets will be a gain of approximately $10,000.

Accounting_Policies_by_Policy_

Accounting Policies, by Policy (Policies)	6 Months Ended
	Oct. 31, 2014
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of Consolidation
	The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, Elecsys International Corporation.  All significant intercompany balances and transactions have been eliminated in consolidation.
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income
	The Company has no components of other comprehensive income, therefore comprehensive income equals net income.
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Value of Financial Instruments
	The carrying amount of financial instruments, including cash, accounts receivable, accounts payable, and the current portion of long-term debt approximates fair value because of the short-term nature of these items.
	The carrying value of the Company’s long-term debt approximates fair value as the Industrial Revenue Bonds include a variable interest rate component.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements
	In April 2014, the Financial Accounting Standards Board (“FASB”) revised the authoritative guidance on reporting discontinued operations.  The revised guidance specifies that a disposal of a component of an entity or a group of components of an entity is required to be reported in a discontinued operation if the disposal represents a strategic shift that has, or will have a major effect on an entity's operations and financial results.  The guidance also changes the requirements for reporting discontinued operations which requires additional disclosures for discontinued operations and new disclosures for individually material disposal transactions that do not meet the definition of a discontinued operation.  The guidance is effective for us beginning in the first quarter of fiscal 2016.  We are currently evaluating the impact this guidance may have on our financial position, results of operations and cash flows.
	In May 2014, the FASB issued Accounting Standards Update (“ASU”) No. 2014-09, "Revenue from Contracts with Customers."  This ASU is a comprehensive new revenue recognition model that requires a company to recognize revenue to depict the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. This ASU is effective for annual reporting periods beginning after December 15, 2016 and early adoption is not permitted. Accordingly, we will adopt this ASU on May 1, 2017.  Companies may use either a full retrospective or modified retrospective approach to adopt this ASU and we are currently evaluating which transition approach to use and the full impact this ASU will have on our future financial statements.
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition
	The Company derives revenue from the manufacture of production units of electronic assemblies, liquid crystal displays, and its proprietary products including its remote monitoring equipment, industrial data communications equipment, and its mobile computing products.  The Company also derives revenue from repairs and non-warranty services, engineering design services, remote monitoring services and maintenance contracts.  Production and repaired units are billed to the customer when they are shipped.  Remote monitoring services and maintenance contracts are billed and the revenue recognized at the end of the month the services are provided or maintenance periods are completed.  Customers that utilize the Company’s engineering design services are billed and revenue is recognized when the design services or tooling have been completed.  The Company requires its customers to provide a binding purchase order to verify the manufacturing services to be provided.  Typically, the Company does not have any post-shipment obligations, including customer acceptance requirements.  The Company does provide training and installation services to its customers and those services are billed and the revenue recognized at the end of the month the services are completed, which is typically in the same period that the equipment is delivered.  The Company also provides an extended warranty for additional purchase price to the customer.  The Company recognizes the revenue from the extended warranties over the specific period of the warranty.  Revenue recognized is net of any sales taxes, tariffs, or duties remitted to any governmental authority.
Receivables, Policy [Policy Text Block]	Accounts Receivable
	Accounts receivable are carried at original invoice amount less an estimate made for doubtful receivables based on a review of all outstanding amounts on a monthly basis. Management determines the allowance for doubtful accounts by regularly evaluating individual customer receivables, considering a customer’s financial condition and credit history, as well as current economic conditions. Receivables are written off when deemed uncollectible. Recoveries of receivables previously written off are recorded when received.  The majority of the customer accounts are considered past due after the invoice becomes older than the customer’s credit terms (30 days for the majority of customers).  Interest is not charged on past due accounts for the majority of the Company’s customers.
Inventory, Policy [Policy Text Block]	Inventories
	Inventories are stated at the lower of cost, using the first-in, first-out (FIFO) method, or market value.  The Company’s industry is characterized by rapid technological change, short-term customer commitments and rapid changes in demand, as well as other market considerations.  Provisions for estimated excess and obsolete inventory are based on quarterly reviews of inventory quantities on hand and the latest forecasts of product demand and production requirements from customers.  Inventories are reviewed in detail on a quarterly basis utilizing multiple annual time horizons ranging from 24-months to 60-months.  Individual part numbers that have not been used in each of the time horizons are examined by manufacturing personnel for obsolescence, excess and market value.  Parts that are not identified for common use or are unique to a former customer or application are categorized as obsolete and are included in the provision for estimated excess and obsolete inventory.  If actual market conditions or customers’ product demands are less favorable than those projected, additional inventory write-downs may be required.
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment
	Property and equipment are recorded at cost.  Depreciation is computed using the straight-line method over the following estimated useful lives:
	Description		Years
	Building and improvements		39
	Equipment	3	-	8
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]	Goodwill
	Goodwill is initially measured as the excess of the cost of an acquired business over the fair value of the identifiable net assets acquired.  The Company does not amortize goodwill, but rather reviews its carrying value for impairment annually (January 31) and whenever an impairment indicator is identified.  The goodwill impairment test involves a two-step approach.  The first step is to identify whether potential impairment of goodwill exists. If impairment of goodwill is determined to exist, the second step of the goodwill impairment test measures the amount of the impairment using a fair value-based approach.  No impairment indicators were identified as of October 31, 2014.
Intangible Assets, Finite-Lived, Policy [Policy Text Block]	Intangible Assets
	Intangible assets consist of patents, trademarks, copyrights, customer relationships and capitalized software.  Intangible assets are amortized over their estimated useful lives using the straight-line method.  The useful lives of the Company’s intangible assets range from 5 – 15 years.
Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block]	Impairment of Long-Lived Intangible Assets
	Long-lived assets, including amortizable intangible assets, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or group of assets may not be fully recoverable. These events or changes in circumstances may include a significant deterioration of operating results, changes in business plans, or changes in anticipated future cash flows. If an impairment indicator is present, the Company evaluates recoverability by a comparison of the carrying amount of the assets to future undiscounted cash flows expected to be generated by the asset group.  If the sum of the expected future undiscounted cash flows is less than the carrying amount, the Company would recognize an impairment loss. An impairment loss would be measured by comparing the amount by which the carrying value exceeds the fair value of the long-lived assets and intangibles.
Income Tax, Policy [Policy Text Block]	Income Taxes
	The Company accounts for income taxes in accordance with ASC Topic 740, Income Taxes.  Deferred tax assets and liabilities are recognized for the future tax consequences attributable to the differences between the tax bases of assets and liabilities and their carrying amount for financial reporting purposes, as measured by the enacted tax rates which will be in effect when these differences are expected to reverse.  The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.  In assessing the realizability of deferred income tax assets, the Company considers whether it is “more likely than not,” according to the criteria of ASC Topic 740, that some portion or all of the deferred income tax assets will be realized.  The ultimate realization of deferred income tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible.  ASC Topic 740 requires that the Company recognize the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more likely than not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with the relevant tax authority.
Guarantees, Indemnifications and Warranties Policies [Policy Text Block]	Warranty Reserve
	The Company has established a warranty reserve for rework, product warranties and customer refunds.  The Company provides a limited warranty for a period of one year from the date of receipt of products by customers and the Company offers extended warranties for additional purchase by its customers.  The standard warranties require the Company to repair or replace defective products at no cost to the customer or refund the customer’s purchase price.  The warranty reserve is based on historical experience and analysis of specific known and potential warranty issues.  The product warranty liability reflects management’s best estimate of probable liability under the product warranties.
Shipping and Handling Cost, Policy [Policy Text Block]	Shipping and Handling Costs
	Shipping and handling costs that are billed to our customers are recognized as revenues in the period that the product is shipped.  Shipping and handling costs that are incurred by the Company are recognized as cost of revenues in the period that the product is shipped.

Note_1_Nature_of_Operations_an1

Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Oct. 31, 2014
Accounting Policies [Abstract]
Property, Plant and Equipment [Table Text Block]	Description		Years
	Building and improvements		39
	Equipment	3	-	8

Note_3_Intangible_Assets_and_G1

Note 3 - Intangible Assets and Goodwill (Tables)	6 Months Ended
	Oct. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets [Table Text Block]					31-Oct-14					30-Apr-14
	Intangible Asset Description	Estimated			Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
		Useful
		Lives
	Patents, trademarks and copyrights	10	–	15	$	852	$	(508	)	$	852	$	(473	)
	Customer relationships	5	–	15		1,040		(544	)		1,040		(512	)
	Trade name		15			530		(253	)		530		(236	)
	Technologies		15			475		(210	)		475		(193	)
					$	2,897	$	(1,515	)	$	2,897	$	(1,414	)
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Year	Amounts
	2015 (remaining)	$	76
	2016		147
	2017		147
	2018		147
	2019		147
	2020		147

Note_4_Inventory_Tables

Note 4 - Inventory (Tables)	6 Months Ended
	Oct. 31, 2014
Inventory Disclosure [Abstract]
Schedule of Inventory, Current [Table Text Block]		31-Oct-14			30-Apr-14
	Raw material	$	3,655		$	4,057
	Work-in-process		1,086			801
	Finished goods		3,669			3,301
			8,410			8,159
	Reserves		(526	)		(615	)
		$	7,884		$	7,544

Note_5_Stockholders_Equity_Tab

Note 5 - Stockholders' Equity (Tables)	6 Months Ended
	Oct. 31, 2014
Note 5 - Stockholders' Equity (Tables) [Line Items]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]			Six Months				Six Months
			Ended				Ended
			31-Oct-14				31-Oct-13
	Risk-free interest rate			2.97%				2.97%
	Expected life, in years			6				6
	Expected volatility		84.47	–	84.52%		82.59	–	82.61%
	Dividend yield			0.00%				0.00%
	Forfeiture rate			11.60%				11.40%
Schedule of Share-based Compensation, Activity [Table Text Block]			Number				Weighted-				Weighted-
			of				Average				Average
	Stock Options		Shares				Exercise Price				Remaining
											Contract Life
											(Years)
	Outstanding options at April 30, 2014			255,967			$	4.93
	Granted			35,000			$	12.44
	Exercised			1,763			$	5.32
	Forfeited			1,667			$	5.86
	Outstanding options at October 31, 2014			287,537			$	5.84				6.37
	Outstanding exercisable at October 31, 2014			180,704			$	4.54				4.92
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]					Options Outstanding										Options Exercisable
	Range of Exercise Prices				Number				Weighted-Average Remaining Contractual Life (years)				Weighted-Average Exercise Price		Number		Weighted-Average Exercise Price
					Outstanding at										Exercisable at
					31-Oct-14										October 31, 2014
	$3.01	-	$4.00			101,250				3.78			$	3.53		85,250	$	3.62
	$4.01	-	$5.00			20,537				7.56			$	4.35		13,037	$	4.35
	$5.01	-	$6.00			113,000				7.39			$	5.53		74,667	$	5.36
	$7.01	-	$8.00			7,750				3.86			$	7.05		7,750	$	7.05
	$11.01	-	$12.00			10,000				9.08			$	11.83		-		-
	$12.01	-	$13.00			35,000				9.58			$	12.44		-		-
		Total				287,537				6.37			$	5.84		180,704	$	4.54
Restricted Stock [Member]
Note 5 - Stockholders' Equity (Tables) [Line Items]
Schedule of Share-based Compensation, Activity [Table Text Block]	Restricted Stock		Number
			of
			Shares
	Outstanding awards at April 30, 2014			11,146
	Granted			3,860
	Issued			5,493
	Forfeited			2,226
	Outstanding awards at October 31, 2014			7,287
	Outstanding vested at October 31, 2014			-

Note_6_Net_Income_Per_Share_Ta

Note 6 - Net Income Per Share (Tables)	6 Months Ended
	Oct. 31, 2014
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]		Three Months Ended				Six Months Ended
		October 31,				October 31,
		2014		2013		2014		2013
	Numerator:
	Net income	$	80	$	653	$	353	$	917
	Denominator:
	Weighted average common shares Outstanding – basic		3,827		3,860		3,826		3,877
	Effect of dilutive options outstanding		137		77		143		65
	Weighted average common shares outstanding – diluted		3,964		3,937		3,969		3,942

Note_7_Pledged_Assets_Notes_Pa1

Note 7 - Pledged Assets, Notes Payable and Long-Term Debt (Tables)	6 Months Ended
	Oct. 31, 2014
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]		31-Oct-14		30-Apr-14
	Industrial Revenue Bonds, Series 2006A, 5-year adjustable interest rate based on the yield on 5-year United States Treasury Notes, plus .45% (1.89% as of October 31, 2014), due in monthly principal and interest payments beginning October 1, 2006 through maturity  on September 1, 2026, secured by real estate.  Effective September 1, 2011, the 5-year adjustable interest rate was reset to 1.89% for the next five years.	$	2,524	$	2,619
	Operating line of credit, $6,000,000 limit on borrowing capacity, prime rate (3.25% at October 31, 2014) plus/minus 0.5% performance based interest, due in full on October 30, 2016, secured by accounts receivable and inventory.  The interest rate as of October 31, 2014 was 2.75%		-		-
			2,524		2,619
	Less current maturities		190		189
	Total long-term debt	$	2,334	$	2,430
Schedule of Maturities of Long-term Debt [Table Text Block]	Year	Amount
	2015 (remaining)	$	94
	2016		192
	2017		196
	2018		200
	2019		204
	2020		208
	Thereafter		1,430
		$	2,524

Note_8_Segment_Reporting_Table

Note 8 - Segment Reporting (Tables)	6 Months Ended
	Oct. 31, 2014
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]		Three Months Ended October 31, 2014
		OEM		Proprietary		Total
	Total revenues	$	3,540	$	2,938	$	6,478
	Gross margin	$	872	$	1,457	$	2,329
		Three Months Ended October 31, 2013
		OEM		Proprietary		Total
	Total revenues	$	3,588	$	3,742	$	7,330
	Gross margin	$	1,092	$	1,937	$	3,029
		Six Months Ended October 31, 2014
		OEM		Proprietary		Total
	Total revenues	$	7,845	$	5,304	$	13,149
	Gross margin	$	2,115	$	2,663	$	4,778
	Goodwill	$	-	$	1,942	$	1,942
		Six Months Ended October 31, 2013
		OEM		Proprietary		Total
	Total revenues	$	7,898	$	6,206	$	14,104
	Gross margin	$	2,076	$	3,160	$	5,236
	Goodwill	$	-	$	1,942	$	1,942
Revenue from External Customers by Products and Services [Table Text Block]		Three Months Ended				Six Months Ended
		October 31,				October 31,
		2014		2013		2014		2013
	Products and services:
	OEM solutions	$	3,489	$	3,525	$	7,730	$	7,773
	Remote monitoring solutions		2,361		2,859		3,804		4,334
	Industrial data communications		249		253		546		496
	Mobile data acquisition		267		513		760		1,175
	Other services:
	OEM related services		51		63		115		125
	Proprietary product related services		61		117		194		201
	Total revenues	$	6,478	$	7,330	$	13,149	$	14,104

Note_9_Warranty_Tables

Note 9 - Warranty (Tables)	6 Months Ended
	Oct. 31, 2014
Product Warranties Disclosures [Abstract]
Schedule of Product Warranty Liability [Table Text Block]		Six Months Ended October 31,
		2014			2013
	Warranty reserve balance at beginning of period	$	125		$	90
	Expense accrued, including adjustments		88			36
	Warranty costs incurred		(67	)		(36	)
	Warranty reserve balance at end of period	$	146		$	90

Note_1_Nature_of_Operations_an2

Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details)	6 Months Ended
	Oct. 31, 2014
Minimum [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Maximum [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years

Note_1_Nature_of_Operations_an3

Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) - Property and Equipment, Estimated Useful Lives	6 Months Ended
	Oct. 31, 2014
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	39 years
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	3 years
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful lives	8 years

Note_3_Intangible_Assets_and_G2

Note 3 - Intangible Assets and Goodwill (Details) (USD $)	6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Apr. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of Intangible Assets	$103,000	$103,000
Goodwill	1,942,000	1,942,000	1,942,000
Goodwill, Other Changes	$0

Note_3_Intangible_Assets_and_G3

Note 3 - Intangible Assets and Goodwill (Details) - The Companybs Total Intangible Assets (in thousands) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2014	Apr. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Carrying Amount	$2,897	$2,897
Amortization	-1,515	-1,414
Patents, Trademarks and Copyrights [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives	10 years
Patents, Trademarks and Copyrights [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives	15 years
Patents, Trademarks and Copyrights [Member]
Finite-Lived Intangible Assets [Line Items]
Carrying Amount	852	852
Amortization	-508	-473
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives	5 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives	15 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Carrying Amount	1,040	1,040
Amortization	-544	-512
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives	15 years
Carrying Amount	530	530
Amortization	-253	-236
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives	15 years
Carrying Amount	475	475
Amortization	($210)	($193)
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives	5 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Lives	15 years

Note_3_Intangible_Assets_and_G4

Note 3 - Intangible Assets and Goodwill (Details) - Estimated Amortization Expense (USD $)	Oct. 31, 2014
In Thousands, unless otherwise specified
Estimated Amortization Expense [Abstract]
2015 (remaining)	$76
2016	147
2017	147
2018	147
2019	147
2020	$147

Note_4_Inventory_Details_Inven

Note 4 - Inventory (Details) - Inventories (USD $)	Oct. 31, 2014	Apr. 30, 2014
In Thousands, unless otherwise specified
Inventories [Abstract]
Raw material	$3,655	$4,057
Work-in-process	1,086	801
Finished goods	3,669	3,301
	8,410	8,159
Reserves	-526	-615
	$7,884	$7,544

Note_5_Stockholders_Equity_Det

Note 5 - Stockholders' Equity (Details) (USD $)	6 Months Ended		0 Months Ended	22 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Dec. 17, 2012	Oct. 31, 2014	Apr. 30, 2014
Note 5 - Stockholders' Equity (Details) [Line Items]
Share Based Compensation, Number Of Plans	2			2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	287,537			287,537	255,967
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options (in Dollars)	$4,000	$0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)	465,000			465,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 211 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value (in Dollars)	1,199,000			1,199,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value (in Dollars)	985,000			985,000
Share-based Compensation (in Dollars)	142,000	93,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$9.02
Restricted Stock [Member] | 2010 Equity Incentive Plan [Member]
Note 5 - Stockholders' Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	7,286			7,286
Restricted Stock [Member]
Note 5 - Stockholders' Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$9.02
Minimum [Member] | 1991 Stock Option Plan [Member]
Note 5 - Stockholders' Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year
Maximum [Member] | 1991 Stock Option Plan [Member]
Note 5 - Stockholders' Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
1991 Stock Option Plan [Member]
Note 5 - Stockholders' Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	675,000			675,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	90,000			90,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	27,000			27,000
2010 Equity Incentive Plan [Member]
Note 5 - Stockholders' Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	380,000			380,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	197,537			197,537
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	156,350			156,350
Stock Repurchase Plan [Member]
Note 5 - Stockholders' Equity (Details) [Line Items]
Share Repurchase Program, Repurchase Percentage			10.00%
Share Repurchase Program, Shares to be Repurchased			400,000
Stock Repurchased During Period, Shares	0			158,181
Stock Repurchased During Period, Value (in Dollars)				$985,000
Stock Repurchase Plan, Shares Repurchased to Date, Average Cost Per Share (in Dollars per share)	$6.23			$6.23

Note_5_Stockholders_Equity_Det1

Note 5 - Stockholders' Equity (Details) - Stock Options Valuation Assumptions	6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Note 5 - Stockholders' Equity (Details) - Stock Options Valuation Assumptions [Line Items]
Risk-free interest rate	2.97%	2.97%
Expected life, in years	6 years	6 years
Dividend yield	0.00%	0.00%
Forfeiture rate	11.60%	11.40%
Minimum [Member]
Note 5 - Stockholders' Equity (Details) - Stock Options Valuation Assumptions [Line Items]
Expected volatility	84.47%	82.59%
Maximum [Member]
Note 5 - Stockholders' Equity (Details) - Stock Options Valuation Assumptions [Line Items]
Expected volatility	84.52%	82.61%

Note_5_Stockholders_Equity_Det2

Note 5 - Stockholders' Equity (Details) - Equity Award Activity, Stock Options (USD $)	0 Months Ended	6 Months Ended
	Oct. 31, 2014	Oct. 31, 2014	Apr. 30, 2014
Equity Award Activity, Stock Options [Abstract]
Number of Shares		287,537	255,967
Weighted-Average Exercise Price		$5.84	$4.93
Weighted-Average Remaining Contract Life (Years)		6 years 135 days
Outstanding exercisable at October 31, 2014		180,704
Outstanding exercisable at October 31, 2014		$4.54
Outstanding exercisable at October 31, 2014	4 years 335 days
Granted		35,000
Granted		$12.44
Exercised		1,763
Exercised		$5.32
Forfeited		1,667
Forfeited		$5.86

Note_5_Stockholders_Equity_Det3

Note 5 - Stockholders' Equity (Details) - Equity Award Activity, Restricted Stock	6 Months Ended
	Oct. 31, 2014	Apr. 30, 2014
Equity Award Activity, Restricted Stock [Abstract]
Number of Shares	7,287	11,146
Granted	3,860
Issued	5,493
Forfeited	2,226

Note_5_Stockholders_Equity_Det4

Note 5 - Stockholders' Equity (Details) - Options Outstanding and Exercisable, by Exercise Range (USD $)	6 Months Ended
	Oct. 31, 2014	Apr. 30, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options Outstanding (in Shares)	287,537
Options Outstanding, Weighted-Average Remaining Contractual Life	6 years 135 days
Options Outstanding, Weighted-Average Exercise Price	$5.84	$4.93
Number of Options Exercisable (in Shares)	180,704
Options Exercisable, Weighted-Average Exercise Price	$4.54
Exercise Price Range 1 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$3.01
Range of Exercise Prices, Upper Limit	$4
Number of Options Outstanding (in Shares)	101,250
Options Outstanding, Weighted-Average Remaining Contractual Life	3 years 284 days
Options Outstanding, Weighted-Average Exercise Price	$3.53
Number of Options Exercisable (in Shares)	85,250
Options Exercisable, Weighted-Average Exercise Price	$3.62
Exercise Price Range 2 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$4.01
Range of Exercise Prices, Upper Limit	$5
Number of Options Outstanding (in Shares)	20,537
Options Outstanding, Weighted-Average Remaining Contractual Life	7 years 204 days
Options Outstanding, Weighted-Average Exercise Price	$4.35
Number of Options Exercisable (in Shares)	13,037
Options Exercisable, Weighted-Average Exercise Price	$4.35
Exercise Price Range 3 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$5.01
Range of Exercise Prices, Upper Limit	$6
Number of Options Outstanding (in Shares)	113,000
Options Outstanding, Weighted-Average Remaining Contractual Life	7 years 142 days
Options Outstanding, Weighted-Average Exercise Price	$5.53
Number of Options Exercisable (in Shares)	74,667
Options Exercisable, Weighted-Average Exercise Price	$5.36
Exercise Price Range 4 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$7.01
Range of Exercise Prices, Upper Limit	$8
Number of Options Outstanding (in Shares)	7,750
Options Outstanding, Weighted-Average Remaining Contractual Life	3 years 313 days
Options Outstanding, Weighted-Average Exercise Price	$7.05
Number of Options Exercisable (in Shares)	7,750
Options Exercisable, Weighted-Average Exercise Price	$7.05
Exercise Price Range 5 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$11.01
Range of Exercise Prices, Upper Limit	$12
Number of Options Outstanding (in Shares)	10,000
Options Outstanding, Weighted-Average Remaining Contractual Life	9 years 29 days
Options Outstanding, Weighted-Average Exercise Price	$11.83
Exercise Price Range 6 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$12.01
Range of Exercise Prices, Upper Limit	$13
Number of Options Outstanding (in Shares)	35,000
Options Outstanding, Weighted-Average Remaining Contractual Life	9 years 211 days
Options Outstanding, Weighted-Average Exercise Price	$12.44

Note_6_Net_Income_Per_Share_De

Note 6 - Net Income Per Share (Details)	3 Months Ended		6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	45,000	45,000	60,000	60,000

Note_6_Net_Income_Per_Share_De1

Note 6 - Net Income Per Share (Details) - Basic and Diluted Income Per Share (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013	Apr. 30, 2014
Basic and Diluted Income Per Share [Abstract]
Net income (in Dollars)	$80	$653	$353	$917	$2,467
Weighted average common shares Outstanding b basic	3,827	3,860	3,826	3,877
Effect of dilutive options outstanding	137	77	143	65
Weighted average common shares outstanding b diluted	3,964	3,937	3,969	3,942

Note_7_Pledged_Assets_Notes_Pa2

Note 7 - Pledged Assets, Notes Payable and Long-Term Debt (Details) (USD $)	6 Months Ended	12 Months Ended
	Oct. 31, 2014	Apr. 30, 2014	Jan. 31, 2014
Note 7 - Pledged Assets, Notes Payable and Long-Term Debt (Details) [Line Items]
Number Of Credit Agreements	2
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$6,000,000	$6,000,000
Line of Credit Facility, Remaining Borrowing Capacity (in Dollars)	$5,003,000
Debt Instrument, Basis Spread on Variable Rate	0.50%	0.50%
Prime Rate [Member] | Line of Credit [Member]
Note 7 - Pledged Assets, Notes Payable and Long-Term Debt (Details) [Line Items]
Debt Instrument, Interest Rate, Reference Rate	3.25%
Line of Credit [Member]
Note 7 - Pledged Assets, Notes Payable and Long-Term Debt (Details) [Line Items]
Line of Credit Facility, Interest Rate at Period End			2.75%

Note_7_Pledged_Assets_Notes_Pa3

Note 7 - Pledged Assets, Notes Payable and Long-Term Debt (Details) - Long-Term Debt (USD $)	Oct. 31, 2014	Apr. 30, 2014
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Industrial Revenue Bonds, Series 2006A, 5-year adjustable interest rate based on the yield on 5-year United States Treasury Notes, plus .45% (1.89% as of October 31, 2014), due in monthly principal and interest payments beginning October 1, 2006 through maturity on September 1, 2026, secured by real estate. Effective September 1, 2011, the 5-year adjustable interest rate was reset to 1.89% for the next five years.	$2,524	$2,619
	2,524	2,619
Less current maturities	190	189
Total long-term debt	$2,334	$2,430

Note_7_Pledged_Assets_Notes_Pa4

Note 7 - Pledged Assets, Notes Payable and Long-Term Debt (Details) - Long-Term Debt (Parentheticals) (USD $)	6 Months Ended	12 Months Ended
	Oct. 31, 2014	Apr. 30, 2014
Debt Instrument [Line Items]
Basis Spread on Variable Rate	0.50%	0.50%
Maturity Date	30-Oct-16	30-Oct-16
Interest Rate	2.75%	2.75%
Operating Line of Credit, Limit on Borrowing Capacity (in Dollars)	$6,000,000	$6,000,000
Operating Line of Credit, Prime Rate	3.25%	3.25%
Pre-reset Interest Rate [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	0.45%	0.45%
Secured Debt [Member] | Five Year United States Treasury Notes [Member]
Debt Instrument [Line Items]
Interest Rate Term	5 years	5 years
Secured Debt [Member]
Debt Instrument [Line Items]
Maturity Date	1-Sep-26	1-Sep-26
Interest Rate	1.89%	1.89%

Note_7_Pledged_Assets_Notes_Pa5

Note 7 - Pledged Assets, Notes Payable and Long-Term Debt (Details) - Principal to be Paid on the Long-Term Debt (USD $)	Oct. 31, 2014	Apr. 30, 2014
In Thousands, unless otherwise specified
Principal to be Paid on the Long-Term Debt [Abstract]
2015 (remaining)	$94
2016	192
2017	196
2018	200
2019	204
2020	208
Thereafter	1,430
	$2,524	$2,619

Note_8_Segment_Reporting_Detai

Note 8 - Segment Reporting (Details)	6 Months Ended
	Oct. 31, 2014
Segment Reporting [Abstract]
Number of Reportable Segments	2

Note_8_Segment_Reporting_Detai1

Note 8 - Segment Reporting (Details) - Segment Reporting (USD $)	3 Months Ended		6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013	Apr. 30, 2014
Segment Reporting Information [Line Items]
Total Revenues	$6,478,000	$7,330,000	$13,149,000	$14,104,000
Gross Margin	2,329,000	3,029,000	4,778,000	5,236,000
Goodwill	1,942,000	1,942,000	1,942,000	1,942,000	1,942,000
Original Equipment Manufactures [Member]
Segment Reporting Information [Line Items]
Total Revenues	3,540,000	3,588,000	7,845,000	7,898,000
Gross Margin	872,000	1,092,000	2,115,000	2,076,000
Goodwill	0		0
Proprietary Products [Member]
Segment Reporting Information [Line Items]
Total Revenues	2,938,000	3,742,000	5,304,000	6,206,000
Gross Margin	1,457,000	1,937,000	2,663,000	3,160,000
Goodwill	$1,942,000	$1,942,000	$1,942,000	$1,942,000

Note_8_Segment_Reporting_Detai2

Note 8 - Segment Reporting (Details) - Total Revenues by Products and Services (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Products and services:
Total sales by products and services	$6,478	$7,330	$13,149	$14,104
Original Equipment Manufactures [Member]
Products and services:
Total sales by products and services	3,489	3,525	7,730	7,773
Remote Monitoring Solutions [Member]
Products and services:
Total sales by products and services	2,361	2,859	3,804	4,334
Industrial Data Communications [Member]
Products and services:
Total sales by products and services	249	253	546	496
Mobile Data Acquisition [Member]
Products and services:
Total sales by products and services	267	513	760	1,175
OEM Related Services [Member]
Products and services:
Total sales by products and services	51	63	115	125
Proprietary Product Related Services [Member]
Products and services:
Total sales by products and services	$61	$117	$194	$201

Note_9_Warranty_Details_Warran

Note 9 - Warranty (Details) - Warranty Liability (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013
Warranty Liability [Abstract]
Warranty reserve balance at beginning of period	$125	$90
Expense accrued, including adjustments	88	36
Warranty costs incurred	-67	-36
Warranty reserve balance at end of period	$146	$90

Note_10_Subsequent_Events_Deta

Note 10 - Subsequent Events (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended	0 Months Ended	37 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013	Apr. 30, 2014	Nov. 04, 2014	Jan. 31, 2014
Note 10 - Subsequent Events (Details) [Line Items]
Common Stock, Par or Stated Value Per Share (in Dollars per share)	$0.01		$0.01		$0.01
Net Income (Loss) Attributable to Parent	$80,000	$653,000	$353,000	$917,000	$2,467,000
Subsequent Event [Member] | Lindsay Corporation [Member]
Note 10 - Subsequent Events (Details) [Line Items]
Common Stock, Par or Stated Value Per Share (in Dollars per share)						$0.01
Business Acquisition, Share Price (in Dollars per share)						$17.50
Merger Termination Fee						2,680,000
Merger Agreemebt, Out Of Pocket Expenses Payable Upon Termination						400,000
Subsequent Event [Member] | Valid Collaborative Arrangement [Member]
Note 10 - Subsequent Events (Details) [Line Items]
Receivable from Asset Purchase Agreement						1,000,000
Physical Transfer Of Goods, Maximum Cost						400,000
Maximum Start Up Costs, On Site Technical Support And Training						200,000
Collaborative Agreement Term						6 months
Revenue Sharing, Term						5 years
Revenue Sharing, Percentage						5.00%
Scenario, Forecast [Member] | RFID Assets [Member]
Note 10 - Subsequent Events (Details) [Line Items]
Gain (Loss) on Disposition of Assets							10,000
eXtremeTAG RFID Products [Member]
Note 10 - Subsequent Events (Details) [Line Items]
Net Income (Loss) Attributable to Parent	$3,000		$4,000