CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flows from Operating Activities:
Net income	$ 1,142,800	$ 1,520,674	$ 2,987,392
Noncash items included in net income:
Depreciation and amortization	393,705	267,741	277,868
Deferred income taxes	(150,000)	(34,000)	(114,000)
Stock based compensation	137,554	103,216	81,175
(Gain) loss on disposal of property	0	(2,650)	0
Tax benefit from stock options exercised	(603,993)	(211,638)	(12,000)
Change in current assets and liabilities:
Accounts receivable	983,421	(1,373,459)	2,087,352
Inventory	(770,975)	238,172	(669,920)
Prepaid items and other assets	73,823	238,091	(354,122)
Income taxes receivable	(214,770)	(172,305)	82,695
Accounts payable	501,910	(320,677)	55,259
Deferred revenue	382,602	126,468	(24,826)
Accrued expenses	(353,875)	(248,779)	108,125
Billings in excess of costs and estimated earnings	105,133	(160,684)	361,699
Deferred rent	(120,967)	(106,525)	(100,791)
Net Cash Provided (Used) by Operating Activities	1,506,368	(136,355)	4,765,906
Cash Flows from Investing Activities:
Restricted cash and cash equivalents	(50,359)	36,152	236,328
Purchase of property and equipment	(179,131)	(85,650)	(99,963)
Business acquisition	(4,241,914)	0	0
Certificate of deposit	924,294	(5,164)	(10,211)
Other assets	8,374	5,178	18,760
Proceeds from the sale of property and equipment	0	2,650	0
Net Cash Provided (Used) by Investing Activities	(3,538,736)	(46,834)	144,914
Cash Flows from Financing Activities:
Tax benefit from stock options exercised	603,993	211,638	12,000
Proceeds from stock options exercised	273,300	128,080	3,400
Net Cash Provided (Used) by Financing Activities	877,293	339,718	15,400
Effect of exchange rate changes on cash and cash equivalents	(6,094)	(127,817)	24,547
Net increase (decrease) in cash and cash equivalents	(1,161,169)	28,712	4,950,767
Cash and Cash Equivalents, beginning of year	8,737,543	8,708,831	3,758,064
Cash and Cash Equivalents, end of year	$ 7,576,374	$ 8,737,543	$ 8,708,831