Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Reconciliation of net income (loss) to cash provided (absorbed) by operating activities
Net income (loss)	$ 86,156	$ 296,162
Adjustments to reconcile net income to net cash provided (absorbed) by operating activities:
Depreciation and amortization	332,040	357,918
Gain on disposal of fixed assets	(18,282)	(50,971)
Deferred taxes	(69,000)	(24,000)
(Increase) decrease in:
Accounts receivable - billed	(2,555,349)	770,527
Accounts receivable - unbilled	659,995	(390,600)
Inventories	123,776	225,205
Prepaid taxes and other assets	92,866	408,343
Prepaid income taxes	81,750	0
Increase (decrease) in:
Accounts payable - trade	273,541	124,544
Accrued expenses and other	13,160	(32,791)
Customer deposits	237,947	(777,075)
Net cash provided (absorbed) by operating activities	(741,400)	907,262
Cash flows from investing activities:
Purchase of available for sale securities	1,985,377	0
Purchases of property and equipment	(245,138)	(8,334)
Proceeds from sale of fixed assets	18,282	50,993
Net cash provided (absorbed) by investing activities	(2,212,233)	42,659
Cash flows from financing activities:
Proceeds from long-term borrowings	39,898	0
Repayments of long-term borrowings	(169,386)	(220,024)
Proceeds from options exercised	8,431	0
Net cash absorbed by financing activities	(121,057)	(220,024)
Net increase (decrease) in cash and cash equivalents	(3,074,690)	729,897
Cash and cash equivalents
Beginning of period	4,367,474	2,130,686
End of period	$ 1,292,784	$ 2,860,583