Segment Information (Schedule of Segment Information) (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Dec. 31, 2018 |
|
| Segment Reporting Information [Line Items] | |||||
| Sales | $ 18,222,980 | $ 15,291,993 | $ 50,346,350 | $ 47,103,837 | |
| Cost of sales | 10,485,429 | 10,051,419 | 30,473,832 | 32,699,559 | |
| Gross profit | 7,737,551 | 5,240,574 | 19,872,518 | 14,404,278 | |
| Selling, general and administrative expenses | 6,108,756 | 6,842,348 | 18,327,186 | 20,702,476 | |
| Operating profit (loss) | 1,628,795 | (1,601,774) | 1,545,332 | (6,298,198) | |
| Other income (expense) | 91,936 | 54,905 | 3,170,161 | 246,020 | |
| Income (Loss) from operations before income taxes | 1,720,731 | (1,546,869) | 4,715,493 | (6,052,178) | |
| Depreciation and amortization | 334,000 | 523,000 | 1,088,684 | 1,695,451 | |
| Capital expenditures | 83,000 | 86,000 | 343,000 | 700,000 | |
| Assets | 57,707,450 | 52,256,000 | 57,707,450 | 52,256,000 | $ 53,321,164 |
| Intersegment Eliminations [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales | (305,000) | (212,000) | (918,000) | (703,000) | |
| Cost of sales | (85,000) | (2,000) | (275,000) | (51,000) | |
| Gross profit | (220,000) | (210,000) | (643,000) | (652,000) | |
| Selling, general and administrative expenses | (220,000) | (210,000) | (643,000) | (652,000) | |
| Depreciation and amortization | |||||
| Capital expenditures | |||||
| Assets | (27,000) | (27,000) | (27,000) | (27,000) | |
| Transition Networks [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales | 12,483,000 | 9,231,000 | 30,548,000 | 26,219,000 | |
| Cost of sales | 6,441,000 | 4,883,000 | 16,809,000 | 14,436,000 | |
| Gross profit | 6,042,000 | 4,348,000 | 13,739,000 | 11,783,000 | |
| Selling, general and administrative expenses | 3,810,000 | 3,481,000 | 11,080,000 | 10,212,000 | |
| Operating profit (loss) | 2,232,000 | 867,000 | 2,659,000 | 1,571,000 | |
| Other income (expense) | (11,000) | (1,000) | (12,000) | 3,000 | |
| Income (Loss) from operations before income taxes | 2,221,000 | 866,000 | 2,647,000 | 1,574,000 | |
| Depreciation and amortization | 74,000 | 96,000 | 224,000 | 337,000 | |
| Capital expenditures | 7,000 | 31,000 | 11,000 | 69,000 | |
| Assets | 18,487,000 | 17,644,000 | 18,487,000 | 17,644,000 | |
| Suttle [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales | 4,651,000 | 5,009,000 | 14,918,000 | 17,855,000 | |
| Cost of sales | 3,198,000 | 4,093,000 | 10,198,000 | 15,105,000 | |
| Gross profit | 1,453,000 | 916,000 | 4,720,000 | 2,750,000 | |
| Selling, general and administrative expenses | 888,000 | 1,756,000 | 2,883,000 | 5,633,000 | |
| Operating profit (loss) | 565,000 | (840,000) | 1,837,000 | (2,883,000) | |
| Other income (expense) | 5,000 | (5,000) | 2,994,000 | 15,000 | |
| Income (Loss) from operations before income taxes | 570,000 | (845,000) | 4,831,000 | (2,868,000) | |
| Depreciation and amortization | 223,000 | 374,000 | 735,000 | 1,173,000 | |
| Capital expenditures | 48,000 | 16,000 | 508,000 | ||
| Assets | 9,212,000 | 13,277,000 | 9,212,000 | 13,277,000 | |
| JDL Technologies [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales | 783,000 | 859,000 | 3,942,000 | 2,482,000 | |
| Cost of sales | 603,000 | 712,000 | 2,643,000 | 2,281,000 | |
| Gross profit | 180,000 | 147,000 | 1,299,000 | 201,000 | |
| Selling, general and administrative expenses | 349,000 | 380,000 | 1,056,000 | 1,225,000 | |
| Operating profit (loss) | (169,000) | (233,000) | 243,000 | (1,024,000) | |
| Other income (expense) | (10,000) | 3,000 | |||
| Income (Loss) from operations before income taxes | (169,000) | (233,000) | 233,000 | (1,021,000) | |
| Depreciation and amortization | 26,000 | 40,000 | 80,000 | 144,000 | |
| Capital expenditures | 4,000 | 40,000 | |||
| Assets | 1,419,000 | 1,177,000 | 1,419,000 | 1,177,000 | |
| Net2Edge [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales | 611,000 | 405,000 | 1,856,000 | 1,251,000 | |
| Cost of sales | 328,000 | 365,000 | 1,099,000 | 929,000 | |
| Gross profit | 283,000 | 40,000 | 757,000 | 322,000 | |
| Selling, general and administrative expenses | 653,000 | 809,000 | 2,162,000 | 2,533,000 | |
| Operating profit (loss) | (370,000) | (769,000) | (1,405,000) | (2,211,000) | |
| Other income (expense) | 22,000 | 19,000 | 25,000 | 31,000 | |
| Income (Loss) from operations before income taxes | (348,000) | (750,000) | (1,380,000) | (2,180,000) | |
| Depreciation and amortization | 11,000 | 13,000 | 50,000 | 41,000 | |
| Capital expenditures | (7,000) | 8,000 | 109,000 | ||
| Assets | 2,627,000 | 2,421,000 | 2,627,000 | 2,421,000 | |
| Other [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales | |||||
| Cost of sales | |||||
| Gross profit | |||||
| Selling, general and administrative expenses | 629,000 | 627,000 | 1,789,000 | 1,751,000 | |
| Operating profit (loss) | (629,000) | (627,000) | (1,789,000) | (1,751,000) | |
| Other income (expense) | 76,000 | 42,000 | 173,000 | 194,000 | |
| Income (Loss) from operations before income taxes | (553,000) | (585,000) | (1,616,000) | (1,557,000) | |
| Depreciation and amortization | |||||
| Capital expenditures | 72,000 | 14,000 | 268,000 | 14,000 | |
| Assets | $ 25,989,000 | $ 17,764,000 | $ 25,989,000 | $ 17,764,000 | |