CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
CASH FLOW FROM OPERATING ACTIVITIES:
Net income (loss)		$ (1,832,024)	$ 376,681
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		503,060	458,633
Share-based compensation expense		699,254	312,776
Deferred rent		35,606	33,452
Deferred income taxes		(389,671)	275,720
Provision for (recovery of) doubtful accounts		(94,828)	54,147
Inventory reserves		438,801	73,041
Changes in assets and liabilities:
Accounts receivable		362,120	(399,067)
Inventories		(822,824)	399,308
Prepaid expenses and other assets		(173,935)	235,542
Accounts payable		1,873,163	(138,579)
Accrued expenses and other current liabilities		25,057	(659,033)
Net cash provided by operations		623,779	1,022,621
CASH FLOWS (USED FOR) INVESTING ACTIVITIES:
Capital expenditures	[1]	(818,588)	(463,428)
CASH FLOWS (USED FOR) FINANCING ACTIVITIES:
Repayments on equipment lease payable		(114,927)	(141,328)
Proceeds from exercise of stock options			23,400
Repurchase of common stock – 42,995 shares in 2016 and 977,447 shares in 2015		(65,468)	(1,438,771)
Net cash (used for) financing activities		(180,395)	(1,556,699)
NET (DECREASE) IN CASH AND CASH EQUIVALENTS		(375,204)	(977,506)
Cash and cash equivalents, at beginning of year		9,726,007	10,723,513
CASH AND CASH EQUIVALENTS, AT END OF YEAR		9,350,803	9,726,007
SUPPLEMENTAL INFORMATION:
Cash paid during the year for taxes		117,438	63,762
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Capital expenditures		(41,904)	(48,804)
Equipment lease payable		$ 41,904	$ 48,804

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