Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Reconciliation of net income to cash provided (absorbed) by operating activities
Net income (loss)	$ (127,375)	$ 187,892
Adjustments to reconcile net income to net cash provided (absorbed) by operating activities:
Depreciation and amortization	181,998	190,211
Stock option compensation expense	0	8,521
Gain on disposal of fixed assets	(58,255)	(2,837)
Deferred taxes	(64,000)	(13,000)
(Increase) decrease in:
Accounts receivable - billed	1,430,654	246,665
Accounts receivable - unbilled	(291,024)	40,738
Inventories	219,934	(101,776)
Prepaid taxes and other assets	85,062	12,768
Increase (decrease) in:
Accounts payable - trade	211,875	240,142
Accrued expenses and other	46,281	(855,503)
Customer deposits	(809,234)	(96,332)
Net cash provided (absorbed) by operating activities	825,916	(142,511)
Cash flows from investing activities:
Purchases of property and equipment	(7,269)	(243,243)
Proceeds from sale of fixed assets	58,279	3,608
Net cash absorbed by investing activities	51,010	(239,635)
Cash flows from financing activities:
Repayments of long-term borrowings and capital leases	(108,701)	(108,056)
Net cash provided (absorbed) by financing activities	(108,701)	(108,056)
Net increase (decrease) in cash and cash equivalents	768,225	(490,202)
Cash and cash equivalents
Beginning of period	2,130,686	2,573,168
End of period	$ 2,898,911	$ 2,082,966