Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Reconciliation of net income (loss) to cash provided (absorbed) by operating activities
Net income (loss)	$ 309,071	$ (127,375)
Adjustments to reconcile net income to net cash provided (absorbed) by operating activities:
Depreciation and amortization	159,844	181,998
Gain on disposal of fixed assets	(7,157)	(58,255)
Deferred taxes	11,000	(64,000)
(Increase) decrease in:
Accounts receivable - billed	(1,115,048)	1,430,654
Accounts receivable - unbilled	15,748	(291,024)
Inventories	125,422	219,934
Prepaid taxes and other assets	124,617	85,062
Increase (decrease) in:
Accounts payable - trade	42,813	211,875
Accrued expenses and other	(242,980)	46,281
Income taxes payable	189,602	0
Customer deposits	81,815	(809,234)
Net cash provided (absorbed) by operating activities	(305,253)	825,916
Cash flows from investing activities:
Purchase of investment securities	(1,998,922)	0
Purchases of property and equipment	(112,668)	(7,269)
Proceeds from sale of fixed assets	7,144	58,279
Net cash provided (absorbed) by investing activities	(2,104,446)	51,010
Cash flows from financing activities:
Proceeds from long-term borrowings	42,814	0
Repayments of long-term borrowings	(86,023)	(108,701)
Net cash absorbed by financing activities	(43,209)	(108,701)
Net increase (decrease) in cash and cash equivalents	(2,452,908)	768,225
Cash and cash equivalents
Beginning of period	4,367,474	2,130,686
End of period	$ 1,914,566	$ 2,898,911