Information Concerning Industry Segments And Major Customers (Schedule Of Segment Information) (Details) - USD ($) |
3 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Segment Reporting Information [Line Items] | ||||||||||
| Sales | $ 19,043,000 | $ 20,412,000 | $ 22,068,000 | $ 20,800,000 | $ 22,759,000 | $ 25,617,000 | $ 26,311,000 | $ 24,666,000 | $ 82,322,618 | $ 99,352,934 |
| Cost of sales | 61,486,379 | 72,771,393 | ||||||||
| Gross profit | 20,836,239 | 26,581,541 | ||||||||
| Selling, general and administrative expenses | 28,699,138 | 35,185,924 | ||||||||
| Impairment loss | 1,463,000 | 1,617,389 | ||||||||
| Pension liability adjustment gains | 4,148,000 | (4,147,836) | ||||||||
| Restructuring expense | 2,284,541 | |||||||||
| Operating loss | (1,584,000) | $ (4,654,000) | $ (4,067,000) | $ (1,460,000) | (1,891,000) | $ (1,175,000) | $ (2,671,000) | $ 1,280,000 | (11,764,829) | (4,456,547) |
| Depreciation and amortization | 3,186,458 | 3,683,009 | ||||||||
| Capital expenditures | 773,000 | 2,287,000 | ||||||||
| Assets | 58,146,261 | 73,177,016 | 58,146,261 | 73,177,016 | ||||||
| Intersegment Eliminations [Member] | ||||||||||
| Segment Reporting Information [Line Items] | ||||||||||
| Sales | (891,000) | (1,153,000) | ||||||||
| Cost of sales | (91,000) | (177,000) | ||||||||
| Gross profit | (800,000) | (976,000) | ||||||||
| Selling, general and administrative expenses | (800,000) | (956,000) | ||||||||
| Operating loss | (20,000) | |||||||||
| Capital expenditures | (20,000) | |||||||||
| Assets | (27,000) | (27,000) | (27,000) | (27,000) | ||||||
| Suttle [Member] | ||||||||||
| Segment Reporting Information [Line Items] | ||||||||||
| Sales | 32,384,000 | 42,076,000 | ||||||||
| Cost of sales | 30,964,000 | 38,193,000 | ||||||||
| Gross profit | 1,420,000 | 3,883,000 | ||||||||
| Selling, general and administrative expenses | 8,900,000 | 12,525,000 | ||||||||
| Pension liability adjustment gains | 2,285,000 | |||||||||
| Operating loss | (9,765,000) | (8,642,000) | ||||||||
| Depreciation and amortization | 2,155,000 | 2,461,000 | ||||||||
| Capital expenditures | 397,000 | 1,625,000 | ||||||||
| Assets | 18,359,000 | 33,555,000 | 18,359,000 | 33,555,000 | ||||||
| Transition Networks [Member] | ||||||||||
| Segment Reporting Information [Line Items] | ||||||||||
| Sales | 38,541,000 | 41,093,000 | ||||||||
| Cost of sales | 21,779,000 | 23,607,000 | ||||||||
| Gross profit | 16,762,000 | 17,486,000 | ||||||||
| Selling, general and administrative expenses | 15,371,000 | 17,180,000 | ||||||||
| Operating loss | 1,391,000 | 306,000 | ||||||||
| Depreciation and amortization | 705,000 | 852,000 | ||||||||
| Capital expenditures | 232,000 | 188,000 | ||||||||
| Assets | 12,543,000 | 17,518,000 | 12,543,000 | 17,518,000 | ||||||
| JDL Technologies [Member] | ||||||||||
| Segment Reporting Information [Line Items] | ||||||||||
| Sales | 11,210,000 | 15,464,000 | ||||||||
| Cost of sales | 8,437,000 | 10,245,000 | ||||||||
| Gross profit | 2,773,000 | 5,219,000 | ||||||||
| Selling, general and administrative expenses | 2,101,000 | 3,296,000 | ||||||||
| Impairment loss | 1,463,000 | |||||||||
| Operating loss | (791,000) | 1,923,000 | ||||||||
| Depreciation and amortization | 269,000 | 267,000 | ||||||||
| Capital expenditures | 8,000 | 232,000 | ||||||||
| Assets | 1,073,000 | 4,767,000 | 1,073,000 | 4,767,000 | ||||||
| Net2Edge [Member] | ||||||||||
| Segment Reporting Information [Line Items] | ||||||||||
| Sales | 1,079,000 | 1,873,000 | ||||||||
| Cost of sales | 398,000 | 904,000 | ||||||||
| Gross profit | 681,000 | 969,000 | ||||||||
| Selling, general and administrative expenses | 3,127,000 | 3,141,000 | ||||||||
| Impairment loss | 154,000 | |||||||||
| Operating loss | (2,600,000) | (2,172,000) | ||||||||
| Depreciation and amortization | 57,000 | 103,000 | ||||||||
| Capital expenditures | 69,000 | 18,000 | ||||||||
| Assets | 1,229,000 | 1,464,000 | 1,229,000 | 1,464,000 | ||||||
| Other [Member] | ||||||||||
| Segment Reporting Information [Line Items] | ||||||||||
| Pension liability adjustment gains | (4,148,000) | |||||||||
| Operating loss | 4,148,000 | |||||||||
| Capital expenditures | 67,000 | 244,000 | ||||||||
| Assets | $ 24,969,000 | $ 15,900,000 | $ 24,969,000 | $ 15,900,000 | ||||||