SUNation Energy (SUNE) 10-Q 7 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 01, 2019
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2019
Entity Registrant Name	COMMUNICATIONS SYSTEMS INC
Entity Central Index Key	0000022701
Current Fiscal Year End Date	--12-31
Trading Symbol	JCS
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		9,316,576

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 9,490,706	$ 11,056,426
Trade accounts receivable, less allowance for doubtful accounts of $168,000 and $136,000, respectively	13,272,257	13,401,042
Inventories	15,353,018	16,175,616
Prepaid income taxes	146,013	148,036
Other current assets	1,643,156	1,553,972
Current assets held for sale	1,029,111
TOTAL CURRENT ASSETS	40,934,261	42,335,092
PROPERTY, PLANT AND EQUIPMENT, net	9,933,199	10,962,239
OTHER ASSETS:
Deferred income taxes	19,068	19,068
Operating lease right of use asset	449,995
Other assets, net	2,017	4,765
Non-current assets held for sale	852,581
TOTAL OTHER ASSETS	1,323,661	23,833
TOTAL ASSETS	52,191,121	53,321,164
CURRENT LIABILITIES:
Accounts payable	4,253,169	5,394,981
Accrued compensation and benefits	2,255,964	2,892,199
Operating lease liability	89,435
Other accrued liabilities	2,917,235	3,168,049
Dividends payable	185,482	184,541
TOTAL CURRENT LIABILITIES	9,701,285	11,639,770
LONG TERM LIABILITIES:
Long-term compensation plans	40,551
Uncertain tax positions		28,267
Operating lease liability	348,020
TOTAL LONG-TERM LIABILITIES	388,571	28,267
COMMITMENTS AND CONTINGENCIES (Footnote 9)
STOCKHOLDERS' EQUITY
Preferred stock, par value $1.00 per share; 3,000,000 shares authorized; none issued
Common stock, par value $.05 per share; 30,000,000 shares authorized; 9,308,520 and 9,158,438 shares issued and outstanding, respectively	465,426	457,922
Additional paid-in capital	43,036,333	42,680,499
Accumulated deficit	(677,819)	(734,001)
Accumulated other comprehensive loss	(722,675)	(751,293)
TOTAL STOCKHOLDERS' EQUITY	42,101,265	41,653,127
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 52,191,121	$ 53,321,164

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Condensed Consolidated Balance Sheets [Abstract]
Trade accounts receivable, allowance for doubtful accounts	$ 168	$ 136
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.05	$ 0.05
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	9,308,520	9,158,438
Common stock, shares outstanding	9,308,520	9,158,438

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Loss) and Comprehensive Income (Loss) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Condensed Consolidated Statements of Income (Loss) and Comprehensive Income (Loss) [Abstract]
Sales	$ 16,723,294	$ 16,773,685
Cost of sales	10,296,329	11,595,066
Gross profit	6,426,965	5,178,619
Operating expenses:
Selling, general and administrative expenses	6,246,330	7,152,840
Total operating expenses	6,246,330	7,152,840
Operating income (loss)	180,635	(1,974,221)
Other income (expenses):
Investment and other income	44,890	104,121
(Loss) gain on sale of assets	(935)	27,531
Interest and other expense	(9,444)	(9,706)
Other income, net	34,511	121,946
Income (Loss) from operations before income taxes	215,146	(1,852,275)
Income tax (benefit) expense	(24,967)	7,570
Net income (loss)	240,113	(1,859,845)
Other comprehensive income (loss), net of tax:
Unrealized loss (gain) on available-for-sale securities		(6,432)
Foreign currency translation adjustment	28,618	34,094
Total other comprehensive income	28,618	27,662
Comprehensive income (loss)	$ 268,731	$ (1,832,183)
Basic net income (loss) per share:	$ 0.03	$ (0.21)
Diluted net income (loss) per share:	$ 0.03	$ (0.21)
Weighted Average Basic Shares Outstanding	9,176,093	9,000,185
Weighted Average Dilutive Shares Outstanding	9,176,093	9,000,185
Dividends declared per share	$ 0.02	$ 0.04

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total
BALANCE at Dec. 31, 2017	$ 448,685	$ 42,006,750	$ 7,328,671	$ (613,379)	$ 49,170,727
BALANCE, Shares at Dec. 31, 2017	8,973,708
Net income (loss)			(1,859,845)		(1,859,845)
Issuance of common stock under Employee Stock Purchase Plan	$ 398	27,922			28,320
Issuance of common stock under Employee Stock Purchase Plan, Shares	7,955
Issuance of common stock to Employee Stock Ownership Plan	$ 5,982	419,908			425,890
Issuance of common stock to Employee Stock Ownership Plan, Shares	119,632
Issuance of common stock under Executive Stock Plan	$ 1,485				1,485
Issuance of common stock under Executive Stock Plan, Shares	29,708
Share based compensation		84,577			84,577
Other share retirements	$ (401)	(37,387)	9,325		(28,463)
Other share retirements, Shares	8,017
Shareholder dividends			(365,132)		(365,132)
Other comprehensive income (loss)				27,662	27,662
BALANCE at Mar. 31, 2018	$ 456,149	42,501,770	5,113,019	(585,717)	47,485,221
BALANCE, Shares at Mar. 31, 2018	9,122,986
BALANCE at Dec. 31, 2018	$ 457,922	42,680,499	(734,001)	(751,293)	41,653,127
BALANCE, Shares at Dec. 31, 2018	9,158,438
Net income (loss)			240,113		240,113
Issuance of common stock under Employee Stock Purchase Plan	$ 671	26,574			27,245
Issuance of common stock under Employee Stock Purchase Plan, Shares	13,421
Issuance of common stock to Employee Stock Ownership Plan	$ 6,641	262,995			269,636
Issuance of common stock to Employee Stock Ownership Plan, Shares	132,826
Issuance of common stock under Executive Stock Plan	$ 229				229
Issuance of common stock under Executive Stock Plan, Shares	4,575
Share based compensation		69,687			69,687
Other share retirements	$ (37)	(3,422)	1,494		(1,965)
Other share retirements, Shares	740
Shareholder dividends			(185,425)		(185,425)
Other comprehensive income (loss)				28,618	28,618
BALANCE at Mar. 31, 2019	$ 465,426	$ 43,036,333	$ (677,819)	$ (722,675)	$ 42,101,265
BALANCE, Shares at Mar. 31, 2019	9,308,520

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Condensed Consolidated Statements of Changes in Stockholders' Equity [Abstract]
Shareholder dividends per share	$ 0.02	$ 0.04

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 240,113	$ (1,859,845)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization	421,563	631,512
Share based compensation	69,687	84,577
Loss (gain) on sale of assets	935	(27,531)
Changes in assets and liabilities:
Trade accounts receivable	138,418	427,806
Inventories	849,494	(218,697)
Prepaid income taxes	3,300	52,064
Other assets, net	(1,115,523)	(591,025)
Accounts payable	(1,169,546)	433,148
Accrued compensation and benefits	(327,617)	249,526
Other accrued liabilities	(273,469)	1,057,571
Income taxes payable	(28,267)	408
Net cash (used in) provided by operating activities	(1,190,912)	239,514
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(226,302)	(263,867)
Purchases of investments		(3,488,793)
Proceeds from the sale of property, plant and equipment	9,000	29,013
Proceeds from the sale of investments		3,004,602
Net cash used in investing activities	(217,302)	(719,045)
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash dividends paid	(184,484)	(390,738)
Proceeds from issuance of common stock, net of shares withheld	25,509	1,342
Net cash used in financing activities	(158,975)	(389,396)
EFFECT OF FOREIGN EXCHANGE RATE CHANGES ON CASH	1,469	7,374
NET DECREASE IN CASH AND CASH EQUIVALENTS	(1,565,720)	(861,553)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	11,056,426	12,453,663
CASH AND CASH EQUIVALENTS AT END OF PERIOD	9,490,706	11,592,110
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Income taxes refunded		(44,902)
Interest paid	9,369	9,382
Dividends declared not paid	185,482	371,545
Capital expenditures in accounts payable	$ 21,701	$ 61,304

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2019
Summary of Significant Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES  Description of Business  Communications Systems, Inc. (herein collectively referred to as “CSI,” “our,” “we” or the “Company”) is a Minnesota corporation organized in 1969 that operates directly and through its subsidiaries located in the United States (U.S.) and the United Kingdom (U.K.). CSI is principally engaged through its Transition Networks, Inc. (“Transition Networks” or “Transition”) subsidiary and business unit in the manufacture and sale of core media conversion products, Ethernet switches, and other connectivity and data transmission products, and through its Suttle, Inc. (“Suttle”) subsidiary and business unit in the manufacture and sale of connectivity infrastructure products for broadband and voice communications. Through its JDL Technologies, Inc. (“JDL Technologies” or “JDL”) business unit, CSI provides technology solutions including virtualization, managed services, wired and wireless network design and implementation, and hybrid cloud infrastructure and deployment. Through its Net2Edge Limited (“Net2Edge”) U.K.-based business unit, the Company develops, manufactures and sells Ethernet-based edge network access products to telecommunications carriers.   The Company classifies its businesses into four segments corresponding to the Transition Networks, Suttle, JDL Technologies, and Net2Edge business units. Non-allocated general and administrative expenses are separately accounted for as “Other” in the Company’s segment reporting. Intersegment revenues are eliminated upon consolidation.  Financial Statement Presentation  The condensed consolidated balance sheets and condensed consolidated statement of changes in stockholders’ equity as of March 31, 2019 and the related condensed consolidated statements of income (loss) and comprehensive income (loss), and the condensed consolidated statements of cash flows for the periods ended March 31, 2019 and 2018 have been prepared by Company management . In the opinion of management, all adjustments (which include only normal recurring adjustments, except where noted) necessary to present fairly the financial position, results of operations, and cash flows at March 31, 2019 and 2018 and for the periods then ended have been made.  Certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with generally accepted accounting principles in the United States of America have been condensed or omitted. We recommend these condensed consolidated financial statements be read in conjunction with the financial statements and notes thereto included in the Company’s December 31, 2018 Annual Report to Shareholders on Form 10-K. The results of operations for the period ended March 31, 2019 are not necessarily indicative of operating results for the entire year.  The presentation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the balance sheet date, and the reported amounts of revenues and expenses during the reporting period. The estimates and assumptions used in the accompanying condensed consolidated financial statements are based upon management’s evaluation of the relevant facts and circumstances as of the time of the financial statements. Actual results could differ from those estimates.  Except to the extent updated or described below, the significant accounting policies set forth in Note 1 to the consolidated financial statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2018 , appropriately represent, in all material respects, the current status of accounting policies, and are incorporated herein by reference.  Accumulated Other Comprehensive Loss  The components of accumulated other comprehensive loss, net of tax, are as follows:       Foreign Currency Translation Unrealized (loss)/gain on securities Accumulated Other Comprehensive Loss  December 31, 2018 $ (764,000) $ 13,000 $ (751,000)   Net current period change 28,000 0 28,000   March 31, 2019 $ (736,000) $ 13,000 $ (723,000) 

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2019
Revenue Recognition [Abstract]
Revenue Recognition	NOTE 2 – REVENUE RECOGNITION  Transition Networks & Suttle, Inc.  The Company has determined that the revenue recognition for its Suttle and Transition Networks divisions occurs upon delivery of the Company’s connectivity infrastructure and data transmission products. To determine when revenue should be recognized, it is important to determine when the transfer of control has occurred. The Company has determined that control transfers for these products upon shipment or delivery to the customer, in accordance with the agreed upon shipping terms. As such, the timing of revenue recognition occurs at a specific point in time.  JDL Technologies, Inc.  The Company has determined that the following performance obligations identified in its JDL Technologies, Inc. division are transferred over time: managed services and professional services (time and materials (“T&M”) and fixed price). JDL ’s managed services performance obligation is a bundled solution, a series of distinct services that are substantially the same and that have the same pattern of transfer to the customer and are recognized evenly over the term of the contract. T&M professional services arrangements are measured over time with an input method based on hours expended towards satisfying this performance obligation. Fixed price professional service arrangements under a relatively longer-term service will also be measured over time with an input method based on hours expended.  The Company has also identified the following performance obligations within its JDL Technologies division that are recognized at a point in time which include resale of third-party hardware and software, installation, arranging for another party to transfer services to the customer, and certain professional services. The resale of third-party hardware and software is recognized at a point in time, when the goods are shipped or delivered to the customer’s location, in accordance with the shipping terms. Installation services are recognized at a point in time when the services are completed. The service the Company provides to arrange for another party to transfer services to the customer is satisfied at a point in time as the Company has transferred control upon the service first being made available to the customer by the third party vendor, which are required to be presented on a net basis. Depending on the nature of the service, certain professional services transfer control at a point in time. The Company evaluates these circumstances on a case by case basis to determine if revenue should be recognized over time or at a point in time.  Net2Edge Limited  The Company’s Net2Edge division manufactures and markets Ethernet based edge network access devices. The Company principally sells these products through approved partners and integrators outside the United States. The Company has determined that the performance obligation in the Net2Edge division is recognized at a point in time, upon the delivery of its connectivity infrastructure and data transmission products.  Disaggregation of revenue  Revenues are recognized when control of the promised goods or services is transferred to our customers, in an amount that best reflects the consideration we expect to receive in exchange for those goods or services. In accordance with ASC 606-10-50-5, the following tables present how we disaggregate our revenues, which is different for each segment.  For Transition Networks, we analyze revenue by region and product group, which is as follows for the three months ended March 31, 2019 and 2018:     Transition Networks Sales by Region  Three Months Ended March 31  2019 2018  North America $ 6,910,000 $ 7,641,000  Rest of World 725,000 975,000  Europe, Middle East, Africa ("EMEA") 1,255,000 537,000  $ 8,890,000 $ 9,153,000       Transition Networks Sales by Product Group  Three Months Ended March 31  2019 2018  Media converters $ 5,378,000 $ 5,184,000  Ethernet switches and adapters 2,000,000 2,260,000  Other products 1,512,000 1,709,000  $ 8,890,000 $ 9,153,000   For Suttle, we analyze revenues by product and customer group, which is as follows for the three months ended March 31, 2019 and 2018 :     Suttle Sales by Product Group  Three Months Ended March 31  2019 2018  Structured cabling and connecting system products $ 5,077,000 $ 6,573,000  DSL and other products 444,000 400,000  $ 5,521,000 $ 6,973,000       Suttle Sales by Customer Group  Three Months Ended March 31  2019 2018  Communication service providers $ 4,591,000 $ 5,947,000  International 400,000 580,000  Distributors 530,000 446,000  $ 5,521,000 $ 6,973,000   For JDL, we analyze revenue by customer group, which is as follows for the three months ended March 31, 2019 and 2018 :     JDL Revenue by Customer Group  Three Months Ended March 31  2019 2018  Education $ 1,473,000 $ 109,000  Healthcare and commercial clients 735,000 601,000  $ 2,208,000 $ 710,000    The Company does not currently analyze revenue for Net2Edge on a disaggregated basis. Revenues from Net2Edge were $ 448,000 and $ 165,000 for the three months ended March 31, 2019 and 2018 , respectively. 

Leases

Leases	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases	NOTE 3 – LEASES  In February 2016, the Financial Accounting Standards Board (“ FASB ”) issued ASU No. 2016-02, Leases ( ASC Topic 842) , which is intended to improve financial reporting of leasing transactions by requiring organizations that lease assets to recognize assets and liabilities for the rights and obligations created by leases that extend more than twelve months on the balance sheet. This accounting update also requires additional disclosures surrounding the amount, timing, and uncertainty of cash flows arising from leases. This standard is effective for financial statements issued for annual and interim periods beginning after December 15, 2018 for public business entities.  The Company adopted this standard with a cumulative-effect adjustment as of January 1, 2019, the beginning of the period of adoption. The Company has elected the package of practical expedients permitted in ASC Topic 842. Adoption of the new standard resulted in the recording of right of use (“ROU”) assets and lease liabilities of approximately $ 280,000 and $ 259,000 , respectively as of January 1, 2019. ROU assets represent our right to use an underlying asset for the lease term , while lease liabilities represent our obligation to make lease payments arising from the lease. Lease ROU assets and liabilities are recognized at the commencement date of a lease based on the present value of lease payments over the lease term. Because the rate implicit in each individual lease is not readily determinable, the Company uses its incremental borrowing rate to determine the present value of the lease payments. Adoption of the standard did not materially impact the Company’s condensed consolidated balance sheets, consolidated statement of income (loss) and comprehensive income (loss) or condensed consolidated statements of cash flows.  The Company has entered into operating leases for two office locations , including one in February 2019 . These leases have remaining lease terms of 5 to 8 years. One of the leases includes two options to extend the lease for 5 years each, and the other lease includes an option to terminate the lease in 2022 . One of the leases includes a 3% rent adjustment on each anniversary of the lease. As of March 31, 2019 , total ROU assets and operating lease liabilities were $ 450,000 and $ 437,000 , respectively. All operating lease expense is recognized on a straight-line basis over the lease term. In the three months ended March 31, 2019 , the Company recognized $ 29,000 in lease expense.  Information related to the Company’s ROU assets and related lease liabilities were as follows:     Three Months Ended March 31, 2019   Cash paid for operating leases $ 17,000  Right-of-use assets obtained in exchange for new operating lease obligations (1) 450,000  Weighted-average remaining lease term 4 years  Weighted-average discount rate 4.5%  (1) Includes $262,000 for operating leases existing on January 1, 2019 and $188,000 for operating leases that commenced in the first quarter of 2019.  Maturities of lease liabilities as of March 31, 2019 were as follows:      Q2 - Q4 2019 $ 93,000  2020 126,000  2021 131,000  2022 89,000  2023 47,000  Thereafter 4,000  Total lease payments 490,000  Less imputed interest (53,000)  Total operating lease liabilities $ 437,000  Future minimum lease commitments under operating leases based on accounting standards applicable as of December 31, 2018 were as follows:     Year Ending December 31:  2019 $ 106,000  2020 86,000  2021 86,000  2022 50,000  $ 328,000   As of March 31, 2019 , the Company does not have any additional future operating lease obligations that have not yet commenced.

Cash Equivalents and Investment

Cash Equivalents and Investments	3 Months Ended
	Mar. 31, 2019
Cash Equivalents and Investments [Abstract]
Cash Equivalents and Investments	NOTE 4 – CASH EQUIVALENTS AND INVESTMENTS  The following tables show the Company’s cash equivalents amortized cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category recorded as cash and cash equivalents as of March 31, 2019 and December 31, 2018 :     March 31, 2019  Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Cash Equivalents Short-Term Investments Long-Term Investments   Cash equivalents:  Money Market funds $ 6,974,000 $ - $ - $ 6,974,000 $ 6,974,000 $ - $ -  Total $ 6,974,000 $ - $ - $ 6,974,000 $ 6,974,000 $ - $ -         December 31, 2018  Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Cash Equivalents Short-Term Investments Long-Term Investments   Cash equivalents:  Money Market funds $ 8,428,000 $ - $ - $ 8,428,000 $ 8,428,000 $ - $ -  Total $ 8,428,000 $ - $ - $ 8,428,000 $ 8,428,000 $ - $ -  The Company tests for other than temporary losses on a quarterly basis. The Company intends to hold the investments until it can recover the full principal amount and has the ability to do so based on other sources of liquidity. The Company expects such recoveries to occur prior to the contractual maturities. The Company did no t have any unrealized losses as of March 31, 2019 .  The Company did not recognize any gross realized gains or losses during either of the three month periods ending March 31, 2019 or 2018 , respectively. If the Company had realized gains or losses, they would be included within investment and other income in the accompanying condensed consolidated statement of income (loss) and comprehensive income (loss).

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2019
Stock-Based Compensation [Abstract]
Stock-Based Compensation	NOTE 5 - STOCK-BASED COMPENSATION  Employee Stock Purchase Plan  Under the Company’s Employee Stock Purchase Plan (“ESPP”), employees are able to acquire shares of common stock at 85 % of the price at the end of each current quarterly plan term. The most recent term ended March 31, 2019 . The ESPP is considered compensatory under current Internal Revenue Service rules. At March 31, 2019 , after giving effect to the shares issued as of that date, 10,170 shares remain available for future issuance under the ESPP.  2011 Executive Incentive Compensation Plan  On March 28, 2011 the Board adopted and on May 19, 2011 the Company’s shareholders approved the Company’s 2011 Executive Incentive Compensation Plan (“2011 Incentive Plan”). The 2011 Incentive Plan authorizes incentive awards to officers, key employees and non-employee directors in the form of options (incentive and non-qualified), stock appreciation rights, restricted stock, restricted stock units, performance stock units (“deferred stock”), performance cash units, and other awards in stock, cash, or a combination of stock and cash. The 2011 Incentive Plan, as amended, allows the issuance of up to 2,500,000 shares of common stock.  During 2019 , stock options covering 50,769 shares have been awarded to key executive employees and directors. These options expire seven years from the date of award and generally vest 25 % each year beginning one year after the date of award. The Company also granted deferred stock awards of 157,907 shares to key employees during the first quarter of 2019 under the Company’s long-term incentive plan. These awards vest over three years with the first vesting date being March 28, 2020.  At March 31, 2019 , 213,130 shares have been issued under the 2011 Incentive Plan, 1,649,926 shares are subject to currently outstanding options, deferred stock awards, and unvested restricted stock units, and 636,944 shares are eligible for grant under future awards.  Stock Option Plan for Directors  Shares of common stock are reserved for issuance to non-employee directors under options granted by the Company prior to 2011 under its Stock Option Plan for Non-Employee Directors (the “Director Plan”) . Under the Director Plan nonqualified stock options to acquire shares of common stock were automatically granted to each non-employee director concurrent with annual meetings of shareholders in 2010 and earlier years, with t he exercise price of options granted being the fair market value of the common stock on the date of the respective shareholder meetings. Options granted under the Director Plan expire 10 years from date of grant. No options have been granted under the Director Plan since 2011 when the Company amended the Director Plan to prohibit future option grants. As of March 31, 2019 , there were 36,000 shares subject to outstanding options under the Director Plan.  Changes in Stock Options Outstanding  The following table summarizes changes in the number of outstanding stock options under the 2011 Incentive Plan and the Director Plan over the period December 31, 2018 to March 31, 2019 :     Weighted average  Weighted average remaining  exercise price contractual term  Options per share in years  Outstanding – December 31, 2018 1,380,492 $ 7.56 4.18  Awarded 50,769 2.64  Exercised - -  Forfeited (120,171) 11.27  Outstanding – March 31, 2019 1,311,090 7.03 4.24   Exercisable at March 31, 2019 933,496 $ 8.34 3.58  Expected to vest March 31, 2019 1,311,090 7.03 4.24  The aggregate intrinsic value of all options (the amount by which the market price of the stock on the last day of the period exceeded the market price of the stock on the date of grant) outstanding at March 31, 2019 was $ 7,000 . The intrinsic value of all options exercised during the three months ended March 31, 2019 was $ 0 . Net cash proceeds from the exercise of all stock options were $ 0 in each of the three month periods ended March 31, 2019 and 2018 .  Changes in Deferred Stock Outstanding  The following table summarizes the changes in the number of deferred stock shares under the 2011 Incentive Plan over the period December 31, 2018 to March 31, 2019 :     Weighted Average  Grant Date  Shares Fair Value  Outstanding – December 31, 2018 270,066 $ 4.48  Granted 157,907 2.64  Vested (4,575) 4.56  Forfeited (48,562) 4.40  Outstanding – March 31, 2019 374,836 3.34  Compensation Expense  Share-based compensation expense recognized for the three months ended March 31, 2019 was $ 70,000 before income taxes and $ 55,000 after income taxes. Share-based compensation expense recognized for the three months ended March 31 , 2018 was $ 85,000 before income taxes and $ 67,000 after income taxes. Unrecognized compensation expense for the Company’s plans was $ 582,000 at March 31, 2019 and is expected to be recognized over a weighted-average period of 2.8 years. Share-based compensation expense is recorded as a part of selling, general and administrative expenses.

Inventories

Inventories	3 Months Ended
	Mar. 31, 2019
Inventories [Abstract]
Inventories	NOTE 6 - INVENTORIES  Inventories summarized below are priced at the lower of first-in, first-out cost or net realizable value:     March 31 December 31  2019 2018  Finished goods $ 9,656,000 $ 9,608,000  Raw and processed materials 5,697,000 6,568,000  $ 15,353,000 $ 16,176,000

Intangible Assets

Intangible Assets	3 Months Ended
	Mar. 31, 2019
Intangible Assets [Abstract]
Intangible Assets	NOTE 7 –INTANGIBLE ASSETS  The Company’s identifiable intangible assets with finite lives, included in other assets, net on the condensed consolidated balance sheets, are being amortized over their estimated useful lives and were as follows:     March 31, 2019  Gross Carrying Amount Accumulated Amortization Impairment loss Foreign Currency Translation Net   Trademarks $ 98,000 $ (78,000) $ - $ (18,000) $ 2,000  Customer relationships 491,000 (230,000) (154,000) (107,000) -  Technology 229,000 (189,000) - (40,000) -  $ 818,000 $ (497,000) $ (154,000) $ (165,000) $ 2,000      December 31, 2018  Gross Carrying Amount Accumulated Amortization Impairment loss Foreign Currency Translation Net   Trademarks $ 98,000 $ (74,000) $ - $ (19,000) $ 5,000  Customer relationships 491,000 (230,000) (154,000) (107,000) -  Technology 229,000 (178,000) - (51,000) -  $ 818,000 $ (482,000) $ (154,000) $ (177,000) $ 5,000   Amortization expense on these identifiable intangible assets was $ 3,000 for both the three months ended March 31, 2019 and 2018 , respectively. The amortization expense is included in selling, general and administrative expenses. At March 31, 2019 , the estimated future amortization expense for definite-lived intangible assets for the remainder of 2019 and all of the following four fiscal years is as follows:      Year Ending December 31:  2019 $ 2,000 

Warranty

Warranty	3 Months Ended
	Mar. 31, 2019
Warranty [Abstract]
Warranty	NOTE 8 – WARRANTY  We provide reserves for the estimated cost of product warranties at the time revenue is recognized. We estimate the costs of our warranty obligations based on our warranty policy or applicable contractual warranty, historical experience of known product failure rates, and use of materials and service delivery costs incurred in correcting product failures. Management reviews the estimated warranty liability on a quarterly basis to determine its adequacy. The actual warranty expense could differ from the estimates made by the Company based on product performance. The warranty liability is included in other accrued liabilities on the condensed consolidated balance sheet.  The following table presents the changes in the Company’s warranty liability for the three month periods ended March 31, 2019 and 2018 , respectively, the majority of which relates to a five -year obligation to provide for potential future liabilities for network equipment sales.     2019 2018  Beginning balance $ 594,000 $ 603,000  Amounts charged (credited) to expense (13,000) 79,000  Actual warranty costs paid (11,000) (25,000)  Ending balance $ 570,000 $ 657,000

Contingencies

Contingencies	3 Months Ended
	Mar. 31, 2019
Contingencies [Abstract]
Contingencies	NOTE 9 – CONTINGENCIES  In the ordinary course of business, the Company is exposed to legal actions and claims and incurs costs to defend against these actions and claims. Company management is not aware of any outstanding or pending legal actions or claims that could materially affect the Company’s financial position or results of operations.

Debt

Debt	3 Months Ended
	Mar. 31, 2019
Debt [Abstract]
Debt	NOTE 10 – DEBT  Line of Credit The Company has a $15,000,000 line of credit from Wells Fargo Bank, N.A.. The Company had no outstanding borrowings against the line of credit at March 31, 2019 and December 31, 2018 . Due to the revolving nature of loans under our credit facility, additional borrowings and periodic repayments and re-borrowings may be made until the maturity date. The total amount available for borrowings under our credit facility at March 31, 2019 was $ 7,871,000 , based on the borrowing base calculation. Interest on borrowings on the credit line is at LIBOR plus 2.0% ( 4.5% at March 31, 2019 ). The credit agreement expires August 12, 2021 and is secured by assets of the Company. Our credit agreement contains financial covenants including a minimum liquidity balance of $10,000,000 . Liquidity is calculated as the sum of unrestricted cash, marketable securities and the availability on the line of credit. The Company was in compliance with its financial covenants at March 31, 2019 .

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Taxes [Abstract]
Income Taxes	NOTE 11 – INCOME TAXES In the preparation of the Company’s consolidated financial statements, management calculates income taxes based upon the estimated effective rate applicable to operating results for the full fiscal year. This includes estimating the current tax liability as well as assessing differences resulting from different treatment of items for tax and book accounting purposes. These differences result in deferred tax assets and liabilities, which are recorded on the balance sheet. Management analyzes these assets and liabilities regularly and assesses the likelihood that deferred tax assets will be recovered from future taxable income. At March 31, 2019 there was $ 100,000 of net uncertain tax benefit positions that would reduce the effective income tax rate if recognized. The Company records interest and penalties related to income taxes as income tax expense in the condensed consolidated statements of income ( loss ) and comprehensive income (loss).  The Company is subject to U.S. federal income tax as well as income tax of multiple state and foreign jurisdictions. The tax years 2015-2018 remain open to examination by the Internal Revenue Service and the years 2014-2018 remain open to examination by various state tax departments. The tax years from 2015-2018 remain open in Costa Rica. The Company’s effective income tax rate was (11.6%) for the first three months of 2019 . The effective tax rate differs from the federal tax rate of 21 % due to state income taxes, foreign tax rate differences, foreign losses not deductible for U.S. income tax purposes, the effect of uncertain income tax positions, stock compensation shortfalls , provision true-ups, and changes in valuation allowances related to deferred tax assets. The foreign operating losses may ultimately be deductible in the countries in which they occurred; however the Company has not recorded a deferred tax asset for these losses due to uncertainty regarding the eventual realization of the benefit. The effect of the foreign operations was an overall rate decrease of approximately 7.5% for the three months ended March 31, 2019 . There were no additional uncertain tax positions identified in the first three months of 2019 . The Company's effective income tax rate for the three months ended March 31 , 2018 was (0.4%) , and differed from the federal tax rate due to state income taxes, foreign tax rate differences, foreign losses not deductible for U.S. income tax purposes, changes in the reserve for uncertain income tax positions, provisions for interest charges for uncertain income tax positions, stock compensation shortfalls, provision true-ups, and changes in valuation allowances related to deferred tax assets.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2019
Segment Information [Abstract]
Segment Information	NOTE 12 – SEGMENT INFORMATION  Effective January 1, 2019, the Company realigned the financial reporting for its business units. As a result of this realignment, certain corporate general and administrative expenses that were previously included within the business unit level as fully allocated costs are now categorized as “Other”. The Company classifies its businesses into the four segments as follows:  · Transition Networks manufactures media converters, NIDs, NICs, Ethernet switches and other connectivity products that offer customers the ability to affordably integrate the benefits of fiber optics into any data network; · Suttle manufactures and markets connectivity infrastructure products for broadband and voice communications; · JDL Technologies provides technology solutions that address prevalent IT challenges, including virtualization and cloud solutions, managed services, wired and wireless network design and implementation, and converged infrastructure configuration and deployment ; and · Net2Edge develops, manufactures and sells edge network access products to telecommunications carriers .  Management has chosen to organize the Company and disclose reportable segments based on our products and services. Intersegment revenues are eliminated upon consolidation. In order to conform to the 2019 presentation, the Company has reclassified the 2018 Corporate expenses previously allocated to reportable segments to the “Other” section.  Information concerning the Company’s continuing operations in the various segments for the three month periods ended March 31, 2019 and 2018 is as follows:      Transition JDL Intersegment  Networks Suttle Technologies Net2Edge Other Eliminations Total  Three Months Ended March 31, 2019  Sales $ 8,890,000 $ 5,521,000 $ 2,208,000 $ 448,000 $ - $ (344,000) $ 16,723,000  Cost of sales 5,136,000 3,720,000 1,341,000 227,000 - (128,000) 10,296,000  Gross profit 3,754,000 1,801,000 867,000 221,000 - (216,000) 6,427,000  Selling, general and  administrative expenses 3,695,000 1,058,000 376,000 748,000 585,000 (216,000) 6,246,000  Operating income (loss) 59,000 743,000 491,000 (527,000) (585,000) - 181,000  Other income (expense) - 9,000 (10,000) (1,000) 36,000 - 34,000  Income (loss) before income tax $ 59,000 $ 752,000 $ 481,000 $ (528,000) $ (549,000) $ - $ 215,000   Depreciation and amortization $ 79,000 $ 295,000 $ 28,000 $ 20,000 $ - $ - $ 422,000   Capital expenditures $ - $ 16,000 $ 36,000 $ 7,000 $ 167,000 $ - $ 226,000   Assets $ 17,668,000 $ 12,236,000 $ 3,814,000 $ 2,863,000 $ 15,637,000 $ (27,000) $ 52,191,000       Transition JDL Intersegment  Networks Suttle Technologies Net2Edge Other Eliminations Total  Three Months Ended March 31, 2018  Sales $ 9,153,000 $ 6,973,000 $ 710,000 $ 165,000 $ - $ (227,000) $ 16,774,000  Cost of sales 5,226,000 5,598,000 728,000 62,000 - (19,000) 11,595,000  Gross profit (loss) 3,927,000 1,375,000 (18,000) 103,000 - (208,000) 5,179,000  Selling, general and  administrative expenses 3,466,000 1,975,000 424,000 904,000 592,000 (208,000) 7,153,000  Operating (loss) income 461,000 (600,000) (442,000) (801,000) (592,000) - (1,974,000)  Other income (expense) (2,000) 24,000 - (8,000) 108,000 - 122,000  Income (loss) before income tax $ 459,000 $ (576,000) $ (442,000) $ (809,000) $ (484,000) $ - $ (1,852,000)   Depreciation and amortization $ 141,000 $ 414,000 $ 63,000 $ 14,000 $ - $ - $ 632,000   Capital expenditures $ 20,000 $ 227,000 $ - $ 17,000 $ - $ - $ 264,000   Assets $ 13,813,000 $ 17,025,000 $ 1,243,000 $ 1,732,000 $ 23,950,000 $ (27,000) $ 57,736,000  

Net Income (Loss) Per Share

Net Income (Loss) Per Share	3 Months Ended
	Mar. 31, 2019
Net Income (Loss) Per Share [Abstract]
Net Income (Loss) Per Share	NOTE 13 – NET INCOME (LOSS) PER SHARE  Basic net income (loss) per common share is based on the weighted average number of common shares outstanding during each period and year. Diluted net income per common share takes into effect the dilutive effect of potential common shares outstanding. The Company’s only potential common shares outstanding are stock options and shares associated with the long-term incentive compensation plans, which resulted in no dilutive effect for the three month periods ended March 31, 2019 and 2018, respectively . The Company calculates the dilutive effect of outstanding options using the treasury stock method. Options totaling 1,311,090 and 1,332,272 were excluded from the calculation of diluted earnings per share for the three months ended March 31, 2019 and 2018 b ecause the exercise price was greater than the average market price of common stock during the period and deferred stock awards totaling 216,929 and 309,819 shares would not have been included for the three months ended March 31, 2019 and 2018 because of unmet performance conditions.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2019
Fair Value Measurements [Abstract]
Fair Value Measurements	NOTE 14 – FAIR VALUE MEASUREMENTS The accounting guidance establishes a valuation hierarchy for disclosure of the inputs to valuation used to measure fair value. This hierarchy prioritizes the inputs into three broad levels as follows: Level 1 – Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets that the Company has the ability to access at the measurement date. Level 2 – Observable inputs such as quoted prices for similar instruments and quoted prices in markets that are not active, and inputs that are directly observable or can be corroborated by observable market data. The types of assets and liabilities included in Level 2 are typically either comparable to actively traded securities or contracts, such as treasury securities with pricing interpolated from recent trades of similar securities, or priced with models using highly observable inputs, such as commodity options priced using observable forward prices and volatilities. Level 3 – Significant inputs to pricing that have little or no observability as of the reporting date. The types of assets and liabilities included in Level 3 are those with inputs requiring significant management judgment or estimation, such as the complex and subjective models and forecasts used to determine the fair value of financial instruments. Financial assets and liabilities measured at fair value on a recurring basis as of March 31, 2019 and December 31, 2018 , are summarized below:     March 31, 2019   Level 1 Level 2 Level 3 Total Fair Value   Cash equivalents:  Money Market Funds $ 6,974,000 $ - $ - $ 6,974,000  Total $ 6,974,000 $ - $ - $ 6,974,000      December 31, 2018   Level 1 Level 2 Level 3 Total Fair Value   Cash equivalents:  Money Market Funds $ 8,428,000 $ - $ - $ 8,428,000  Total $ 8,428,000 $ - $ - $ 8,428,000  We record transfers between levels of the fair value hierarchy, if necessary, at the end of the reporting period. There were no transfers between levels during the three months ended March 31, 2019 .

General Commitments

General Commitments	3 Months Ended
	Mar. 31, 2019
Contingencies [Abstract]
General Commitments	NOTE 15 – GENERAL COMMITMENTS  On August 2, 2018, the Company entered into a purchase agreement with Launch Properties, LLC for the sale of the Company’s building located at 10900 Red Circle Drive, Minnetonka, MN for $10,000,000 . The building currently includes the Company’s corporate administrative offices, as well as some operations for Transition Networks, Suttle and JDL Technologies. The closing of the transaction is subject to a number of closing conditions, including the buyer’s ability to complete due diligence within 180 days and the buyer’s ability to obtain regulatory approval for its intended use of the property. The due diligence period lapsed on January 29, 2019 and the buyer met certain required obligations . If the sale proceeds, the Company currently expects the transaction to close in the second half of 2019 or early 2020. 

Assets Held for Sale

Assets Held for Sale	3 Months Ended
	Mar. 31, 2019
Assets Held for Sale [Abstract]
Assets Held for Sale	 NOTE 16 – ASSETS HELD FOR SALE  On April 5, 2019, the Company sold its Suttle FutureLink™ Fiber business line, including inventory, equipment, and customer relationships, to PPC Broadband Inc. (“PPC”). The transaction was structured as an Asset Purchase Agreement with a simultaneous signing and closing. The sale price was $5,000,000 cash. The proceeds will be used for general corporate purposes. Concurrent with the closing of the transaction, Suttle and PPC entered into a Transition Services Agreement under which Suttle will continue to manufacture products related to the FutureLink™ Fiber business line until September 30, 2019, to ensure seamless supply to the customer base. Inventory and capital equipment sold under the agreement have been recorded as current and non-current assets held for sale at March 31, 2019. 

Recent Accounting Pronouncement

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2019
Recent Accounting Pronouncements [Abstract]
Recent Accounting Pronouncements	 NOTE 17 – RECENT ACCOUNTING PRONOUNCEMENTS  In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)”, which amends existing guidance and requires an entity to recognize both assets and liabilities arising from financing and operating leases, along with additional qualitative and quantitative disclosures. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within that reporting period, and early adoption is permitted. The Company adopted the accounting standard effective January 1, 2019. Please see Note 3 for the required disclosures related to the impact of adopting this standard.  In June 2016, FASB issued ASU 2016-13, "Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments." The amendments in this update replace the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects expected credit losses. This ASU is intended to provide financial statement users with more decision-useful information about the expected credit losses and is effective for annual periods and interim periods for those annual periods beginning after December 15, 2019, which for us is the first quarter ending March 31, 2020. Entities may early adopt beginning after December 15, 2018. We are currently evaluating the impact of the adoption of ASU 2016-13 on our consolidated financial statements.  

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	NOTE 18 – SUBSEQUENT EVENTS  The Company has evaluated subsequent events through the date of this filing. We do not believe there are any material subsequent events other than those disclosed in the footnotes to these financial statements that require further disclosure. 

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policy)	3 Months Ended
	Mar. 31, 2019
Summary of Significant Accounting Policies [Abstract]
Description of Business	Description of Business  Communications Systems, Inc. (herein collectively referred to as “CSI,” “our,” “we” or the “Company”) is a Minnesota corporation organized in 1969 that operates directly and through its subsidiaries located in the United States (U.S.) and the United Kingdom (U.K.). CSI is principally engaged through its Transition Networks, Inc. (“Transition Networks” or “Transition”) subsidiary and business unit in the manufacture and sale of core media conversion products, Ethernet switches, and other connectivity and data transmission products, and through its Suttle, Inc. (“Suttle”) subsidiary and business unit in the manufacture and sale of connectivity infrastructure products for broadband and voice communications. Through its JDL Technologies, Inc. (“JDL Technologies” or “JDL”) business unit, CSI provides technology solutions including virtualization, managed services, wired and wireless network design and implementation, and hybrid cloud infrastructure and deployment. Through its Net2Edge Limited (“Net2Edge”) U.K.-based business unit, the Company develops, manufactures and sells Ethernet-based edge network access products to telecommunications carriers.   The Company classifies its businesses into four segments corresponding to the Transition Networks, Suttle, JDL Technologies, and Net2Edge business units. Non-allocated general and administrative expenses are separately accounted for as “Other” in the Company’s segment reporting. Intersegment revenues are eliminated upon consolidation.
Financial Statement Presentation	Financial Statement Presentation  The condensed consolidated balance sheets and condensed consolidated statement of changes in stockholders’ equity as of March 31, 2019 and the related condensed consolidated statements of income (loss) and comprehensive income (loss), and the condensed consolidated statements of cash flows for the periods ended March 31, 2019 and 2018 have been prepared by Company management . In the opinion of management, all adjustments (which include only normal recurring adjustments, except where noted) necessary to present fairly the financial position, results of operations, and cash flows at March 31, 2019 and 2018 and for the periods then ended have been made.  Certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with generally accepted accounting principles in the United States of America have been condensed or omitted. We recommend these condensed consolidated financial statements be read in conjunction with the financial statements and notes thereto included in the Company’s December 31, 2018 Annual Report to Shareholders on Form 10-K. The results of operations for the period ended March 31, 2019 are not necessarily indicative of operating results for the entire year.  The presentation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the balance sheet date, and the reported amounts of revenues and expenses during the reporting period. The estimates and assumptions used in the accompanying condensed consolidated financial statements are based upon management’s evaluation of the relevant facts and circumstances as of the time of the financial statements. Actual results could differ from those estimates.  Except to the extent updated or described below, the significant accounting policies set forth in Note 1 to the consolidated financial statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2018 , appropriately represent, in all material respects, the current status of accounting policies, and are incorporated herein by reference.
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss  The components of accumulated other comprehensive loss, net of tax, are as follows:       Foreign Currency Translation Unrealized (loss)/gain on securities Accumulated Other Comprehensive Loss  December 31, 2018 $ (764,000) $ 13,000 $ (751,000)   Net current period change 28,000 0 28,000   March 31, 2019 $ (736,000) $ 13,000 $ (723,000) 

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2019
Summary of Significant Accounting Policies [Abstract]
Components of Accumulated Other Comprehensive Loss	    Foreign Currency Translation Unrealized (loss)/gain on securities Accumulated Other Comprehensive Loss  December 31, 2018 $ (764,000) $ 13,000 $ (751,000)   Net current period change 28,000 0 28,000   March 31, 2019 $ (736,000) $ 13,000 $ (723,000) 

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2019
Revenue Recognition [Abstract]
Schedule of Disaggregation of Revenues	For Transition Networks, we analyze revenue by region and product group, which is as follows for the three months ended March 31, 2019 and 2018:     Transition Networks Sales by Region  Three Months Ended March 31  2019 2018  North America $ 6,910,000 $ 7,641,000  Rest of World 725,000 975,000  Europe, Middle East, Africa ("EMEA") 1,255,000 537,000  $ 8,890,000 $ 9,153,000       Transition Networks Sales by Product Group  Three Months Ended March 31  2019 2018  Media converters $ 5,378,000 $ 5,184,000  Ethernet switches and adapters 2,000,000 2,260,000  Other products 1,512,000 1,709,000  $ 8,890,000 $ 9,153,000   For Suttle, we analyze revenues by product and customer group, which is as follows for the three months ended March 31, 2019 and 2018 :     Suttle Sales by Product Group  Three Months Ended March 31  2019 2018  Structured cabling and connecting system products $ 5,077,000 $ 6,573,000  DSL and other products 444,000 400,000  $ 5,521,000 $ 6,973,000       Suttle Sales by Customer Group  Three Months Ended March 31  2019 2018  Communication service providers $ 4,591,000 $ 5,947,000  International 400,000 580,000  Distributors 530,000 446,000  $ 5,521,000 $ 6,973,000   For JDL, we analyze revenue by customer group, which is as follows for the three months ended March 31, 2019 and 2018 :     JDL Revenue by Customer Group  Three Months Ended March 31  2019 2018  Education $ 1,473,000 $ 109,000  Healthcare and commercial clients 735,000 601,000  $ 2,208,000 $ 710,000  

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Information Related to ROU Assets and Related Lease Liabilities	    Three Months Ended March 31, 2019   Cash paid for operating leases $ 17,000  Right-of-use assets obtained in exchange for new operating lease obligations (1) 450,000  Weighted-average remaining lease term 4 years  Weighted-average discount rate 4.5%  (1) Includes $262,000 for operating leases existing on January 1, 2019 and $188,000 for operating leases that commenced in the first quarter of 2019.
Maturities of Lease Liabilities	   Q2 - Q4 2019 $ 93,000  2020 126,000  2021 131,000  2022 89,000  2023 47,000  Thereafter 4,000  Total lease payments 490,000  Less imputed interest (53,000)  Total operating lease liabilities $ 437,000  
Future Minimum Lease Commitments under Operating Leases based on ASC 840	   Year Ending December 31:  2019 $ 106,000  2020 86,000  2021 86,000  2022 50,000  $ 328,000  

Cash Equivalents and Investme_2

Cash Equivalents and Investments (Tables)	3 Months Ended
	Mar. 31, 2019
Cash Equivalents and Investments [Abstract]
Schedule of Cash Equivalents and Available-for-Sale Securities	   March 31, 2019  Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Cash Equivalents Short-Term Investments Long-Term Investments   Cash equivalents:  Money Market funds $ 6,974,000 $ - $ - $ 6,974,000 $ 6,974,000 $ - $ -  Total $ 6,974,000 $ - $ - $ 6,974,000 $ 6,974,000 $ - $ -         December 31, 2018  Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Cash Equivalents Short-Term Investments Long-Term Investments   Cash equivalents:  Money Market funds $ 8,428,000 $ - $ - $ 8,428,000 $ 8,428,000 $ - $ -  Total $ 8,428,000 $ - $ - $ 8,428,000 $ 8,428,000 $ - $ - 

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2019
Stock-Based Compensation [Abstract]
Schedule of Changes in Number of Outstanding Stock Options Under Director Plan, Stock Plan and 2011 Incentive Plan	   Weighted average  Weighted average remaining  exercise price contractual term  Options per share in years  Outstanding – December 31, 2018 1,380,492 $ 7.56 4.18  Awarded 50,769 2.64  Exercised - -  Forfeited (120,171) 11.27  Outstanding – March 31, 2019 1,311,090 7.03 4.24   Exercisable at March 31, 2019 933,496 $ 8.34 3.58  Expected to vest March 31, 2019 1,311,090 7.03 4.24 
Schedule of Changes in the Number of Deferred Stock Shares Under the Incentive Plan	   Weighted Average  Grant Date  Shares Fair Value  Outstanding – December 31, 2018 270,066 $ 4.48  Granted 157,907 2.64  Vested (4,575) 4.56  Forfeited (48,562) 4.40  Outstanding – March 31, 2019 374,836 3.34 

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2019
Inventories [Abstract]
Schedule of Inventories	   March 31 December 31  2019 2018  Finished goods $ 9,656,000 $ 9,608,000  Raw and processed materials 5,697,000 6,568,000  $ 15,353,000 $ 16,176,000 

Intangible Assets (Tables)

Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2019
Intangible Assets [Abstract]
Schedule of Finite-Lived Intangible Assets	   March 31, 2019  Gross Carrying Amount Accumulated Amortization Impairment loss Foreign Currency Translation Net   Trademarks $ 98,000 $ (78,000) $ - $ (18,000) $ 2,000  Customer relationships 491,000 (230,000) (154,000) (107,000) -  Technology 229,000 (189,000) - (40,000) -  $ 818,000 $ (497,000) $ (154,000) $ (165,000) $ 2,000      December 31, 2018  Gross Carrying Amount Accumulated Amortization Impairment loss Foreign Currency Translation Net   Trademarks $ 98,000 $ (74,000) $ - $ (19,000) $ 5,000  Customer relationships 491,000 (230,000) (154,000) (107,000) -  Technology 229,000 (178,000) - (51,000) -  $ 818,000 $ (482,000) $ (154,000) $ (177,000) $ 5,000 
Schedule of Estimated Future Amortization Expense	   Year Ending December 31:  2019 $ 2,000 

Warranty (Tables)

Warranty (Tables)	3 Months Ended
	Mar. 31, 2019
Warranty [Abstract]
Schedule of Warranty	   2019 2018  Beginning balance $ 594,000 $ 603,000  Amounts charged (credited) to expense (13,000) 79,000  Actual warranty costs paid (11,000) (25,000)  Ending balance $ 570,000 $ 657,000 

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Information [Abstract]
Schedule of Segment Information	   Transition JDL Intersegment  Networks Suttle Technologies Net2Edge Other Eliminations Total  Three Months Ended March 31, 2019  Sales $ 8,890,000 $ 5,521,000 $ 2,208,000 $ 448,000 $ - $ (344,000) $ 16,723,000  Cost of sales 5,136,000 3,720,000 1,341,000 227,000 - (128,000) 10,296,000  Gross profit 3,754,000 1,801,000 867,000 221,000 - (216,000) 6,427,000  Selling, general and  administrative expenses 3,695,000 1,058,000 376,000 748,000 585,000 (216,000) 6,246,000  Operating income (loss) 59,000 743,000 491,000 (527,000) (585,000) - 181,000  Other income (expense) - 9,000 (10,000) (1,000) 36,000 - 34,000  Income (loss) before income tax $ 59,000 $ 752,000 $ 481,000 $ (528,000) $ (549,000) $ - $ 215,000   Depreciation and amortization $ 79,000 $ 295,000 $ 28,000 $ 20,000 $ - $ - $ 422,000   Capital expenditures $ - $ 16,000 $ 36,000 $ 7,000 $ 167,000 $ - $ 226,000   Assets $ 17,668,000 $ 12,236,000 $ 3,814,000 $ 2,863,000 $ 15,637,000 $ (27,000) $ 52,191,000       Transition JDL Intersegment  Networks Suttle Technologies Net2Edge Other Eliminations Total  Three Months Ended March 31, 2018  Sales $ 9,153,000 $ 6,973,000 $ 710,000 $ 165,000 $ - $ (227,000) $ 16,774,000  Cost of sales 5,226,000 5,598,000 728,000 62,000 - (19,000) 11,595,000  Gross profit (loss) 3,927,000 1,375,000 (18,000) 103,000 - (208,000) 5,179,000  Selling, general and  administrative expenses 3,466,000 1,975,000 424,000 904,000 592,000 (208,000) 7,153,000  Operating (loss) income 461,000 (600,000) (442,000) (801,000) (592,000) - (1,974,000)  Other income (expense) (2,000) 24,000 - (8,000) 108,000 - 122,000  Income (loss) before income tax $ 459,000 $ (576,000) $ (442,000) $ (809,000) $ (484,000) $ - $ (1,852,000)   Depreciation and amortization $ 141,000 $ 414,000 $ 63,000 $ 14,000 $ - $ - $ 632,000   Capital expenditures $ 20,000 $ 227,000 $ - $ 17,000 $ - $ - $ 264,000   Assets $ 13,813,000 $ 17,025,000 $ 1,243,000 $ 1,732,000 $ 23,950,000 $ (27,000) $ 57,736,000       

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Measurements [Abstract]
Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis	   March 31, 2019   Level 1 Level 2 Level 3 Total Fair Value   Cash equivalents:  Money Market Funds $ 6,974,000 $ - $ - $ 6,974,000  Total $ 6,974,000 $ - $ - $ 6,974,000      December 31, 2018   Level 1 Level 2 Level 3 Total Fair Value   Cash equivalents:  Money Market Funds $ 8,428,000 $ - $ - $ 8,428,000  Total $ 8,428,000 $ - $ - $ 8,428,000 

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Narrative) (Details)	3 Months Ended
	Mar. 31, 2019segment
Summary of Significant Accounting Policies [Abstract]
Number of segments	4

Summary of Significant Accoun_5

Summary of Significant Accounting Policies (Components of Accumulated Other Comprehensive Loss) (Details)	3 Months Ended
	Mar. 31, 2019USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE	$ 41,653,127
BALANCE	42,101,265
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE	(764,000)
Net current period change	28,000
BALANCE	(736,000)
Unrealized (Loss)/Gain On Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE	13,000
Net current period change	0
BALANCE	13,000
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
BALANCE	(751,293)
Net current period change	28,000
BALANCE	$ (722,675)

Revenue Recognition (Narrative)

Revenue Recognition (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Sales	$ 16,723,294	$ 16,773,685
Net2Edge [Member]
Segment Reporting Information [Line Items]
Sales	$ 448,000	$ 165,000

Revenue Recognition (Schedule o

Revenue Recognition (Schedule of Disaggregation of Revenues) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 16,723,294	$ 16,773,685
Transition Networks [Member]
Disaggregation of Revenue [Line Items]
Revenues	8,890,000	9,153,000
Transition Networks [Member] | North America [Member]
Disaggregation of Revenue [Line Items]
Revenues	6,910,000	7,641,000
Transition Networks [Member] | Rest of World [Member]
Disaggregation of Revenue [Line Items]
Revenues	725,000	975,000
Transition Networks [Member] | Europe, Middle East, Africa ("EMEA") [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,255,000	537,000
Transition Networks [Member] | Media Converters [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,378,000	5,184,000
Transition Networks [Member] | Ethernet Switches and Adapters [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,000,000	2,260,000
Transition Networks [Member] | Other Products [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,512,000	1,709,000
Suttle [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,521,000	6,973,000
Suttle [Member] | Communication Service Providers [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,591,000	5,947,000
Suttle [Member] | International [Member]
Disaggregation of Revenue [Line Items]
Revenues	400,000	580,000
Suttle [Member] | Distributors [Member]
Disaggregation of Revenue [Line Items]
Revenues	530,000	446,000
Suttle [Member] | Structured Cabling and Connecting System Products [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,077,000	6,573,000
Suttle [Member] | DSL and Other Products [Member]
Disaggregation of Revenue [Line Items]
Revenues	444,000	400,000
JDL Technologies [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,208,000	710,000
JDL Technologies [Member] | Education [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,473,000	109,000
JDL Technologies [Member] | Healthcare and Commercial Clients [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 735,000	$ 601,000

Leases (Narrative) (Details)

Leases (Narrative) (Details)	1 Months Ended	3 Months Ended
	Feb. 28, 2019item	Mar. 31, 2019USD ($)item	Jan. 01, 2019USD ($)
Operating lease right of use asset | $		$ 449,995	$ 280,000
Lease liability | $		$ 437,000	$ 259,000
Number of locations	1	2
Lease expense | $		$ 29,000
Lease 1 [Member]
Lease term		5 years
Number of leases with option to extend		1
Number of options to extend		2
Lease renewal term		5 years
Lease 2 [Member]
Lease term		8 years
Date of option to terminate		2022
Number of leases with annual payment adjustment		1
Percentage of annual rent adjustment		3.00%

Leases (Information Related to

Leases (Information Related to ROU Assets and Related Lease Liabilities) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019
Cash paid for operating leases	$ 17,000
Right-of-use assets obtained in exchange for new operating lease obligations	$ 450,000
Weighted-average remaining lease term	4 years
Weighted-average discount rate	4.50%
Operating lease right of use asset	$ 449,995	$ 280,000
Accounting Standards Update 2016-02 [Member]
Operating lease right of use asset	262,000
Commenced During Period [Member]
Operating lease right of use asset	$ 188,000

Leases (Maturities of Lease Lia

Leases (Maturities of Lease Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Q2 - Q4 2019	$ 93
2020	126
2021	131
2022	89
2023	47
Thereafter	4
Total lease payments	490
Less imputed interest	(53)
Total operating lease liabilities	$ 437	$ 259

Leases (Future Minimum Lease Co

Leases (Future Minimum Lease Commitments under Operating Leases based on ASC 840) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2019	$ 106
2020	86
2021	86
2022	50
Total minimum future lease commitments	$ 328

Cash Equivalents and Investme_3

Cash Equivalents and Investments (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Equivalents and Investments [Abstract]
Gross unrealized losses	$ 0
Gross realized gains (losses)	$ 0	$ 0

Cash Equivalents and Investme_4

Cash Equivalents and Investments (Schedule of Cash Equivalents and Available-for-Sale Securities) (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 6,974,000	$ 8,428,000
Gross Unrealized Losses	0
Fair Value	6,974,000	8,428,000
Cash Equivalents	6,974,000	8,428,000
Short-Term Investments
Long-Term Investments
Cash Equivalents [Member] | Money Market Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,974,000	8,428,000
Fair Value	6,974,000	8,428,000
Cash Equivalents	6,974,000	8,428,000
Short-Term Investments
Long-Term Investments

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended		4 Months Ended	84 Months Ended
	Aug. 31, 2011	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2011	Dec. 31, 2018	May 19, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding		1,311,090			1,380,492
Aggregate intrinsic value of options outstanding		$ 7,000
Intrinsic value of all options exercised		$ 0
Number of options exercised
Net cash proceeds from exercise of stock options		$ 0	$ 0
Share based compensation expense before income taxes		70,000	85,000
Share based compensation expense after income taxes		55,000	$ 67,000
Unrecognized compensation expense for awards		$ 582,000
Recognition period for unrecognized compensation expense		2 years 9 months 18 days
2011 Executive Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards authorized						2,500,000
Shares issued under Plan		213,130
Number of options outstanding		1,649,926
Awards eligible for grant		636,944
2011 Executive Incentive Compensation Plan [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting percentage		25.00%
Stock Option Plan For Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted	0	0		0	0
Award expiration period		10 years
Number of options outstanding		36,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of price of common stock at which employees are able to acquire		85.00%
Shares available		10,170
Key Employees [Member] | 2011 Executive Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred stock awards granted		157,907
Key Executive Employees [Member] | 2011 Executive Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted		50,769
Award expiration period		7 years

Stock-Based Compensation (Sched

Stock-Based Compensation (Schedule of Changes in Number of Outstanding Stock Options Under Director Plan, Stock Plan and 2011 Incentive Plan) (Details) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Stock-Based Compensation [Abstract]
Options, Outstanding - December 31, 2018	1,380,492
Options, Awarded	50,769
Options, Exercised
Options, Forfeited	(120,171)
Options, Outstanding - March 31, 2019	1,311,090	1,380,492
Options, Exercisable at March 31, 2019	933,496
Options, Expected to vest March 31, 2019	1,311,090
Weighted average exercise price per share, Outstanding - December 31, 2018	$ 7.56
Weighted average exercise price per share, Awarded	2.64
Weighted average exercise price per share, Exercised
Weighted average exercise price per share, Forfeited	11.27
Weighted average exercise price per share, Outstanding - March 31, 2019	7.03	$ 7.56
Weighted average exercise price per share, Exercisable at March 31, 2019	8.34
Weighted average exercise price per share, Expected to vest March 31, 2019	$ 7.03
Options, Outstanding - Weighted average remaining contractual term (in years)	4 years 2 months 27 days	4 years 2 months 5 days
Options, Exercisable - Weighted average remaining contractual term (in years)	3 years 6 months 29 days
Options, Expected to vest - Weighted average remaining contractual term (in years)	4 years 2 months 27 days

Stock-Based Compensation (Sch_2

Stock-Based Compensation (Schedule of Changes in the Number of Deferred Stock Shares Under the Incentive Plan) (Details) - Performance Units [Member]	3 Months Ended
	Mar. 31, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding - December 31, 2018 | shares	270,066
Shares, Granted | shares	157,907
Shares, Vested | shares	(4,575)
Shares, Forfeited | shares	(48,562)
Shares, Outstanding - March 31, 2019 | shares	374,836
Weighted Average Grant Date Fair Value, Outstanding - December 31, 2018 | $ / shares	$ 4.48
Weighted Average Grant Date Fair Value, Granted | $ / shares	2.64
Weighted Average Grant Date Fair Value, Vested | $ / shares	4.56
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	4.40
Weighted Average Grant Date Fair Value, Outstanding - March 31, 2019 | $ / shares	$ 3.34

Inventories (Schedule of Invent

Inventories (Schedule of Inventories) (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Inventories [Abstract]
Finished goods	$ 9,656,000	$ 9,608,000
Raw and processed materials	5,697,000	6,568,000
Inventories	$ 15,353,018	$ 16,175,616

Intangible Assets (Narrative) (

Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Intangible Assets [Abstract]
Amortization expense	$ 3	$ 3

Intangible Assets (Schedule of

Intangible Assets (Schedule of Finite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 818	$ 818
Accumulated Amortization	(497)	(482)
Impairment loss	(154)	(154)
Foreign Currency Translation	(165)	(177)
Net	2	5
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	98	98
Accumulated Amortization	(78)	(74)
Impairment loss
Foreign Currency Translation	(18)	(19)
Net	2	5
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	491	491
Accumulated Amortization	(230)	(230)
Impairment loss	(154)	(154)
Foreign Currency Translation	(107)	(107)
Net
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	229	229
Accumulated Amortization	(189)	(178)
Impairment loss
Foreign Currency Translation	(40)	(51)
Net

Intangible Assets (Schedule o_2

Intangible Assets (Schedule of Estimated Future Amortization Expense) (Details)	Mar. 31, 2019USD ($)
Intangible Assets [Abstract]
2019	$ 2,000

Warranty (Details)

Warranty (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Warranty [Abstract]
Product warranty period	5 years
Beginning balance	$ 594	$ 603
Amounts charged (credited) to expense	(13)	79
Actual warranty costs paid	(11)	(25)
Ending balance	$ 570	$ 657

Debt (Narrative) (Details)

Debt (Narrative) (Details) - Line of Credit [Member] - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity	$ 15,000,000
Line of credit, amount outstanding	0	$ 0
Line of credit, remaining borrowing capacity	$ 7,871,000
Line of credit facility, interest rate at period end	4.50%
Line of credit, expiration date	Aug. 12, 2021
Minimum liquidity	$ 10,000,000
LIBOR [Member]
Debt Instrument [Line Items]
Line of credit, basis spread on variable rate	2.00%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Taxes [Abstract]
Uncertain tax benefit positions that would reduce the effective income tax rate if recognized	$ 100,000
Effective tax rate	(11.60%)	0.40%
Federal tax rate	21.00%
Foreign net operating loss carry-forwards and credits	$ 0
Foreign income taxes, net of foreign tax credits	7.50%
Uncertain tax positions	$ 0

Segment Information (Narrative)

Segment Information (Narrative) (Details)	3 Months Ended
	Mar. 31, 2019segment
Segment Information [Abstract]
Number of segments	4

Segment Information (Schedule o

Segment Information (Schedule of Segment Information) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Sales	$ 16,723,294	$ 16,773,685
Cost of sales	10,296,329	11,595,066
Gross profit	6,426,965	5,178,619
Selling, general and administrative expenses	6,246,330	7,152,840
Operating income (loss)	180,635	(1,974,221)
Other income (expense)	34,511	121,946
Income (Loss) from operations before income taxes	215,146	(1,852,275)
Depreciation and amortization	421,563	631,512
Capital expenditures	226,000	264,000
Assets	52,191,121	57,736,000	$ 53,321,164
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales	(344,000)	(227,000)
Cost of sales	(128,000)	(19,000)
Gross profit	(216,000)	(208,000)
Selling, general and administrative expenses	(216,000)	(208,000)
Depreciation and amortization
Capital expenditures
Assets	(27,000)	(27,000)
Transition Networks [Member]
Segment Reporting Information [Line Items]
Sales	8,890,000	9,153,000
Cost of sales	5,136,000	5,226,000
Gross profit	3,754,000	3,927,000
Selling, general and administrative expenses	3,695,000	3,466,000
Operating income (loss)	59,000	461,000
Other income (expense)		(2,000)
Income (Loss) from operations before income taxes	59,000	459,000
Depreciation and amortization	79,000	141,000
Capital expenditures		20,000
Assets	17,668,000	13,813,000
Suttle [Member]
Segment Reporting Information [Line Items]
Sales	5,521,000	6,973,000
Cost of sales	3,720,000	5,598,000
Gross profit	1,801,000	1,375,000
Selling, general and administrative expenses	1,058,000	1,975,000
Operating income (loss)	743,000	(600,000)
Other income (expense)	9,000	24,000
Income (Loss) from operations before income taxes	752,000	(576,000)
Depreciation and amortization	295,000	414,000
Capital expenditures	16,000	227,000
Assets	12,236,000	17,025,000
JDL Technologies [Member]
Segment Reporting Information [Line Items]
Sales	2,208,000	710,000
Cost of sales	1,341,000	728,000
Gross profit	867,000	(18,000)
Selling, general and administrative expenses	376,000	424,000
Operating income (loss)	491,000	(442,000)
Other income (expense)	(10,000)
Income (Loss) from operations before income taxes	481,000	(442,000)
Depreciation and amortization	28,000	63,000
Capital expenditures	36,000
Assets	3,814,000	1,243,000
Net2Edge [Member]
Segment Reporting Information [Line Items]
Sales	448,000	165,000
Cost of sales	227,000	62,000
Gross profit	221,000	103,000
Selling, general and administrative expenses	748,000	904,000
Operating income (loss)	(527,000)	(801,000)
Other income (expense)	(1,000)	(8,000)
Income (Loss) from operations before income taxes	(528,000)	(809,000)
Depreciation and amortization	20,000	14,000
Capital expenditures	7,000	17,000
Assets	2,863,000	1,732,000
Other [Member]
Segment Reporting Information [Line Items]
Sales
Cost of sales
Gross profit
Selling, general and administrative expenses	585,000	592,000
Operating income (loss)	(585,000)	(592,000)
Other income (expense)	36,000	108,000
Income (Loss) from operations before income taxes	(549,000)	(484,000)
Depreciation and amortization
Capital expenditures	167,000
Assets	$ 15,637,000	$ 23,950,000

Net Income (Loss) Per Share (Na

Net Income (Loss) Per Share (Narrative) (Details) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive effect of outstanding stock options and shares associated with long-term incentive compensation plans	0	0
Stock Compensation Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares not included in the computation of diluted earnings per share	1,311,090	1,332,272
Performance Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares not included in the computation of diluted earnings per share	216,929	309,819

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details)	3 Months Ended
	Mar. 31, 2019USD ($)
Fair Value Measurements [Abstract]
Transfers between levels	$ 0

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets (Liabilities) Net, fair value	$ 6,974	$ 8,428
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets (Liabilities) Net, fair value	6,974	8,428
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	6,974	8,428
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 6,974	$ 8,428

General Commitments (Narrative)

General Commitments (Narrative) (Details)	Aug. 02, 2018USD ($)
Contingencies [Abstract]
Sale of building, purchase agreement, consideration amount	$ 10,000,000
Purchase agreement, buyer to complete due diligence, period	180 days

Assets Held for Sale (Narrative

Assets Held for Sale (Narrative) (Details)	Apr. 05, 2019USD ($)
Subsequent Event [Member]
Proceeds from sale	$ 5,000,000