SEGMENT AND RELATED INFORMATION (Details) - Schedule of Segment Reporting Financial Information Including Total Assets by Segment - USD ($)		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Net revenues by segment:
Net sales by segment		$ 31,326,727	$ 33,109,106
Segment income (loss):
Segment income		2,237,117	4,019,310
Other unallocated amounts:
Corporate expenses		(4,785,226)	(3,272,271)
Other income - net		363,851	(24,418)
Consolidated income (loss) from operations before income taxes		(2,184,258)	722,621
Depreciation and amortization by segment:
Depreciation and amortization by segment		503,060	458,633
Capital expenditures by segment (a):
Capital expenditures by segment	[1]	818,588	463,428
Total assets by segment:
Total assets by segment		18,446,249	17,792,271
Corporate assets, principally cash and cash equivalents and deferred income taxes		16,988,886	16,914,053
Total consolidated assets		35,435,135	34,706,324
Network Solutions [Member]
Net revenues by segment:
Net sales by segment		20,198,377	21,534,831
Segment income (loss):
Segment income		2,485,585	3,290,220
Depreciation and amortization by segment:
Depreciation and amortization by segment		254,590	225,194
Capital expenditures by segment (a):
Capital expenditures by segment	[1]	463,626	371,718
Total assets by segment:
Total assets by segment		10,594,770	10,638,961
Test and Measurement [Member]
Net revenues by segment:
Net sales by segment		11,128,350	11,574,275
Segment income (loss):
Segment income		(248,468)	729,090
Depreciation and amortization by segment:
Depreciation and amortization by segment		248,470	233,439
Capital expenditures by segment (a):
Capital expenditures by segment	[1]	354,962	91,710
Total assets by segment:
Total assets by segment		$ 7,851,479	$ 7,153,310

[1] Net of equipment lease payable of $41,904 for 2016 (network solutions segment) and $48,804 for 2015 (test and measurement segment).