CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Sales:
Products	$ 13,400,132	$ 11,588,804	$ 40,088,427	$ 32,516,670
Consulting services	789,741	717,347	2,236,639	2,172,215
Total sales	14,189,873	12,306,151	42,325,066	34,688,885
Cost of sales:
Products	5,657,331	5,120,131	17,275,469	14,508,813
Consulting services	473,621	472,801	1,356,904	1,323,752
Total cost of sales	6,130,952	5,592,932	18,632,373	15,832,565
Gross profit	8,058,921	6,713,219	23,692,693	18,856,320
Selling, general and administrative expenses	5,257,664	5,103,957	16,528,574	14,482,256
Research and development expenses	886,289	843,780	3,084,583	2,609,929
Operating income	1,914,968	765,482	4,079,536	1,764,135
Other income (expense), net	(95,308)	(25,815)	(285,990)	116,890
Income before income taxes	1,819,660	739,667	3,793,546	1,881,025
Income tax expense (benefit)	460,999	246,577	766,637	709,422
Net income	$ 1,358,661	$ 493,090	$ 3,026,909	$ 1,171,603
Net income per common share:
Basic (in dollars per share)	$ 0.24	$ 0.09	$ 0.55	$ 0.21
Diluted (in dollars per share)	$ 0.24	$ 0.09	$ 0.53	$ 0.21
Weighted average common shares outstanding:
Basic (in shares)	5,548,201	5,477,928	5,535,687	5,467,450
Diluted (in shares)	5,684,515	5,683,436	5,673,694	5,695,305
Cash dividends declared per common share (in dollars per share)	$ 0.110	$ 0.105	$ 0.330	$ 0.315