Segment Information (Schedule Of Segment Information) (Details) - USD ($) |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2016 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
Dec. 31, 2015 |
|
| Segment Reporting Information [Line Items] | |||||
| Sales | $ 26,311,442 | $ 28,197,661 | $ 50,977,886 | $ 47,742,597 | |
| Cost of sales | 18,935,699 | 19,658,792 | 36,833,125 | 34,316,789 | |
| Gross profit | 7,375,000 | 8,539,000 | 14,145,000 | 13,426,000 | |
| Selling, general and administrative expenses | 10,047,201 | 10,256,538 | 19,684,262 | 20,834,714 | |
| Pension liability adjustment gains | (4,147,836) | ||||
| Operating income (loss) | (2,671,458) | (1,717,669) | (1,391,665) | (7,408,906) | |
| Depreciation and amortization | 943,000 | 851,000 | 1,833,848 | 1,633,260 | |
| Capital expenditures | 465,000 | 802,000 | 1,271,000 | 1,655,000 | |
| Assets | 85,946,384 | 97,571,000 | 85,946,384 | 97,571,000 | $ 87,916,230 |
| Intersegment Eliminations [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales | (321,000) | (264,000) | (655,000) | (272,000) | |
| Cost of sales | (50,000) | (41,000) | (142,000) | (49,000) | |
| Gross profit | (271,000) | (223,000) | (513,000) | (223,000) | |
| Selling, general and administrative expenses | (268,000) | (223,000) | (494,000) | (223,000) | |
| Operating income (loss) | (3,000) | (19,000) | |||
| Capital expenditures | (3,000) | (19,000) | |||
| Assets | (26,000) | (26,000) | |||
| Suttle [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales | 11,216,000 | 11,788,000 | 23,005,000 | 22,378,000 | |
| Cost of sales | 10,116,000 | 9,533,000 | 19,860,000 | 18,682,000 | |
| Gross profit | 1,100,000 | 2,255,000 | 3,145,000 | 3,696,000 | |
| Selling, general and administrative expenses | 3,661,000 | 3,504,000 | 7,147,000 | 7,810,000 | |
| Operating income (loss) | (2,561,000) | (1,249,000) | (4,002,000) | (4,114,000) | |
| Depreciation and amortization | 616,000 | 546,000 | 1,192,000 | 1,053,000 | |
| Capital expenditures | 342,000 | 518,000 | 821,000 | 1,167,000 | |
| Assets | 39,811,000 | 41,872,000 | 39,811,000 | 41,872,000 | |
| Transition Networks [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales | 10,175,000 | 11,753,000 | 18,506,000 | 19,518,000 | |
| Cost of sales | 5,773,000 | 6,431,000 | 10,920,000 | 11,038,000 | |
| Gross profit | 4,402,000 | 5,322,000 | 7,586,000 | 8,480,000 | |
| Selling, general and administrative expenses | 4,762,000 | 4,966,000 | 9,401,000 | 9,732,000 | |
| Operating income (loss) | (360,000) | 356,000 | (1,815,000) | (1,252,000) | |
| Depreciation and amortization | 232,000 | 231,000 | 453,000 | 444,000 | |
| Capital expenditures | 75,000 | 127,000 | 160,000 | 193,000 | |
| Assets | 19,798,000 | 24,806,000 | 19,798,000 | 24,806,000 | |
| JDL Technologies [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales | 4,650,000 | 4,718,000 | 8,963,000 | 5,583,000 | |
| Cost of sales | 2,783,000 | 3,618,000 | 5,641,000 | 4,442,000 | |
| Gross profit | 1,867,000 | 1,100,000 | 3,322,000 | 1,141,000 | |
| Selling, general and administrative expenses | 961,000 | 1,056,000 | 1,968,000 | 1,866,000 | |
| Operating income (loss) | 906,000 | 44,000 | 1,354,000 | (725,000) | |
| Depreciation and amortization | 63,000 | 38,000 | 124,000 | 66,000 | |
| Capital expenditures | 9,000 | 127,000 | 84,000 | 170,000 | |
| Assets | 5,911,000 | 4,212,000 | 5,911,000 | 4,212,000 | |
| Net2Edge [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales | 591,000 | 203,000 | 1,159,000 | 536,000 | |
| Cost of sales | 314,000 | 118,000 | 554,000 | 204,000 | |
| Gross profit | 277,000 | 85,000 | 605,000 | 332,000 | |
| Selling, general and administrative expenses | 931,000 | 954,000 | 1,662,000 | 1,650,000 | |
| Operating income (loss) | (654,000) | (869,000) | (1,057,000) | (1,318,000) | |
| Depreciation and amortization | 32,000 | 36,000 | 65,000 | 70,000 | |
| Capital expenditures | 2,000 | 2,000 | 20,000 | ||
| Assets | 1,670,000 | 1,868,000 | 1,670,000 | 1,868,000 | |
| Other [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Pension liability adjustment gains | (4,148,000) | ||||
| Operating income (loss) | 4,148,000 | ||||
| Capital expenditures | 40,000 | 30,000 | 223,000 | 105,000 | |
| Assets | $ 18,782,000 | $ 24,813,000 | $ 18,782,000 | $ 24,813,000 | |