Condensed Consolidated Balance Sheets (unaudited) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 54,140,459	$ 44,067,477
Accounts receivable, net of reserves of $332,148 and $337,459 at June 30, 2013 and December 31, 2012, respectively	19,065,386	21,462,481
Inventories	10,357,798	8,283,472
Current portion deferred income taxes	1,989,422	2,031,583
Prepaid expenses and other	920,873	1,539,477
Total current assets	86,473,938	77,384,490
Property and equipment, at cost	51,618,726	52,376,013
Less: accumulated depreciation	(17,772,147)	(17,263,032)
Property, Plant and Equipment, Net, Total	33,846,579	35,112,981
Long-term deposits and other	154,050	171,053
Intangible assets, net	18,996,886	20,334,636
Goodwill	8,923,197	9,065,891
Total Assets	148,394,650	142,069,051
Current liabilities:
Accounts payable	2,699,678	2,341,838
Accrued expenses	4,503,551	5,837,044
Deferred revenue	1,527,917	2,875,067
Current portion of long-term debt	1,600,000	1,600,000
Income taxes payable	1,370,172	1,798,669
Total current liabilities	11,701,318	14,452,618
Other long-term liabilities	1,264,427	1,541,124
Long-term deferred revenue	2,069,444	2,152,778
Deferred tax liability	6,725,622	6,997,397
Long-term debt	7,200,000	8,000,000
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock, $.01 par value; 1,250,000 shares authorized, no shares issued and outstanding at June 30, 2013 and December 31, 2012, respectively
Common stock, $.01 par value; 30,000,000 shares authorized, 14,017,280 and 13,866,060 shares issued and outstanding at June 30, 2013 and December 31, 2012, respectively	140,173	138,659
Additional paid-in-capital	67,385,076	65,431,424
Accumulated currency translation adjustment	(3,063,985)	(2,654,630)
Retained earnings	54,972,575	46,009,681
Total stockholders' equity	119,433,839	108,925,134
Total Liabilities and Stockholders' Equity	$ 148,394,650	$ 142,069,051