Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of net income (loss) to cash provided (absorbed) by operating activities
Net income (loss)	$ 376,691	$ (351,680)
Adjustments to reconcile net income to net cash provided (absorbed) by operating activities
Depreciation and amortization	674,160	712,832
Deferred taxes	(234,000)	175,000
Stock option compensation expense	0	17,043
Gain on sale of fixed assets	(110,175)	(81,376)
(Increase) decrease in
Accounts receivable - billed	2,604,342	327,735
Accounts receivable - unbilled	(332,215)	629,504
Inventories	(164,473)	(94,966)
Prepaid expenses and other assets	(9,015)	(325,582)
Prepaid income taxes	554,285	(433,571)
Increase (decrease) in
Accounts payable - trade	67,924	(459,908)
Accrued expenses and other	354,848	(953,079)
Customer deposits	(893,202)	754,942
Net cash provided (absorbed) by operating activities	2,889,170	(83,106)
Cash Flows From Investing Activities
Purchases of property and equipment	(110,275)	(742,735)
Proceeds from sale of fixed assets	112,325	99,453
Net cash provided (absorbed) by investing activities	2,050	(643,282)
Cash Flows From Financing Activities
Proceeds from long-term borrowings	0	575,000
Repayments of long-term borrowings	(413,800)	(396,214)
Dividends paid on common stock	(240,632)	0
Proceeds from options exercised	0	105,120
Net cash provided (absorbed) by financing activities	(654,432)	283,906
Net increase (decrease) in cash and cash equivalents	2,236,788	(442,482)
Cash and cash equivalents
Beginning of period	2,130,686	2,573,168
End of period	4,367,474	2,130,686
Supplemental schedule of non-cash investing activities
Cash Payments for interest	134,828	136,067
Cash Payments for income taxes	$ 6,000	$ 101,525