Annual report pursuant to Section 13 and 15(d)

Information Concerning Industry Segments and Major Customers (Schedule of Segment Information) (Details)

v3.20.1
Information Concerning Industry Segments and Major Customers (Schedule of Segment Information) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Segment Reporting Information [Line Items]                    
Sales $ 15,364,000 $ 13,622,000 $ 10,704,000 $ 11,216,000 $ 13,121,000 $ 10,283,000 $ 9,165,000 $ 9,800,000 $ 50,906,179 $ 42,369,232
Cost of sales                 28,720,367 24,747,115
Gross profit                 22,185,812 17,622,117
Selling, general and administrative expenses                 22,176,598 22,372,765
Operating income (loss) from continuing operations 1,187,000 $ 772,000 $ (1,129,000) $ (821,000) 220,000 $ (1,251,000) $ (1,804,000) $ (1,916,000) 9,214 (4,750,648)
Other income (expense)                 226,136 224,029
Operating income (loss) from continuing operations before income taxes                 235,350 (4,526,619)
Depreciation and amortization                 1,032,797 1,261,235
Capital expenditures                 425,000 694,000
Assets 59,150,712       53,321,164       59,150,712 53,321,164
Intersegment Eliminations [Member]                    
Segment Reporting Information [Line Items]                    
Sales                 (1,025,000) (935,000)
Cost of sales                 (168,000) (73,000)
Gross profit                 (857,000) (862,000)
Selling, general and administrative expenses                 (857,000) (862,000)
Assets (27,000)       (27,000)       (27,000) (27,000)
Transition Networks [Member]                    
Segment Reporting Information [Line Items]                    
Sales                 44,860,000 36,470,000
Cost of sales                 24,258,000 19,775,000
Gross profit                 20,602,000 16,695,000
Selling, general and administrative expenses                 15,036,000 13,716,000
Operating income (loss) from continuing operations                 5,566,000 2,979,000
Other income (expense)                 (15,000) (31,000)
Operating income (loss) from continuing operations before income taxes                 5,551,000 2,948,000
Depreciation and amortization                 286,000 420,000
Capital expenditures                 62,000 81,000
Assets 16,682,000       19,228,000       16,682,000 19,228,000
JDL Technologies [Member]                    
Segment Reporting Information [Line Items]                    
Sales                 4,741,000 5,134,000
Cost of sales                 3,259,000 3,830,000
Gross profit                 1,482,000 1,304,000
Selling, general and administrative expenses                 1,485,000 1,603,000
Operating income (loss) from continuing operations                 (3,000) (299,000)
Other income (expense)                 (10,000) 3,000
Operating income (loss) from continuing operations before income taxes                 (13,000) (296,000)
Depreciation and amortization                 92,000 179,000
Capital expenditures                 69,000  
Assets 1,694,000       2,572,000       1,694,000 2,572,000
Net2Edge [Member]                    
Segment Reporting Information [Line Items]                    
Sales                 2,330,000 1,700,000
Cost of sales                 1,371,000 1,215,000
Gross profit                 959,000 485,000
Selling, general and administrative expenses                 2,486,000 3,279,000
Operating income (loss) from continuing operations                 (1,527,000) (2,794,000)
Other income (expense)                 8,000 22,000
Operating income (loss) from continuing operations before income taxes                 (1,519,000) (2,772,000)
Depreciation and amortization                 74,000 65,000
Capital expenditures                 19,000 127,000
Assets 3,220,000       1,894,000       3,220,000 1,894,000
Other [Member]                    
Segment Reporting Information [Line Items]                    
Selling, general and administrative expenses                 4,027,000 4,637,000
Operating income (loss) from continuing operations                 (4,027,000) (4,637,000)
Other income (expense)                 243,000 230,000
Operating income (loss) from continuing operations before income taxes                 (3,784,000) (4,407,000)
Depreciation and amortization                 581,000 597,000
Capital expenditures                 275,000 486,000
Assets $ 37,582,000       $ 29,654,000       $ 37,582,000 $ 29,654,000