Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows used by operating activities
Net loss	$ (89,777)	$ (524,369)
Adjustments to reconcile net loss to net cash absorbed by operating activities:
Depreciation and amortization	189,128	169,185
Gain on disposal of fixed assets	(5,868)	(5,254)
Provision for Doubtful Accounts	(26,484)	79,190
Deferred taxes	65,000	(58,000)
(Increase) decrease in operating assets and liabilities
Accounts receivable - billed	(466,818)	(615,662)
Accounts receivable - unbilled	(541,181)	46,603
Inventories	(116,958)	(178,578)
Prepaid expenses and other assets	(103,138)	(96,274)
Prepaid income taxes	(139,870)	(277,779)
Increase (decrease) in:
Accounts payable - trade	125,850	86,737
Accrued expenses and other	383,594	127,404
Accrued compensation	259,919	86,526
Customer deposits	(248,123)	125,185
Net cash used by operating activities	(714,726)	(1,035,086)
Cash flows from investing activities:
Purchases of investment securities available-for-sale	(8,842)	(8,729)
Purchases of property and equipment	(967,378)	(193,730)
Proceeds from sale of fixed assets	5,868	5,092
Net cash used by investing activities	(970,352)	(197,367)
Cash flows from financing activities:
Proceeds from long-term borrowings	465,131	0
Repayments of long-term borrowings	(92,659)	(91,607)
Proceeds from options exercised	0	21,100
Net cash provided (used) by financing activities	372,472	(70,507)
Net decrease in cash and cash equivalents	(1,312,606)	(1,302,960)
Cash and cash equivalents
Beginning of period	1,735,621	3,572,405
End of period	$ 423,015	$ 2,269,445