Consolidated Balance Sheets (Unaudited) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Current Assets:
Cash and cash equivalents	$ 27,719,405	$ 42,684,241
Short term investments	10,775,112	0
Accounts receivable, net of allowance of $200,000 at June 30, 2011 and December 31, 2010, respectively	9,978,838	13,542,535
Inventory	16,049,209	17,815,405
Prepaid expenses and other current assets	3,449,974	1,999,525
Deferred income tax assets, net	8,129,195	6,284,489
Total current assets	76,101,733	82,326,195
Property and equipment, net	31,768,928	35,905,765
Deferred income tax assets, net	13,819,753	13,919,753
Intangible assets, net	3,145,911	3,090,876
Other long-term assets	716,493	944,346
Total assets	125,552,818	136,186,935
Current Liabilities:
Accounts payable	4,995,678	4,550,789
Accrued liabilities	6,603,304	3,759,800
Current portion of deferred revenue	3,023,251	3,265,260
Customer deposits	276,417	372,145
Total current liabilities	14,898,650	11,947,994
Deferred revenue, net of current portion	3,719,053	4,392,860
Liability for unrecorded tax benefits	2,279,851	2,281,840
Total liabilities	20,897,554	18,622,694
Commitments and Contingencies
Stockholders' Equity
Preferred stock, $0.00001 par value per share; 25 million shares authorized; no shares issued and outstanding at June 30, 2011 and December 31, 2010, respectively	0	0
Common stock, $0.00001 par value per share; 200 million shares authorized; 59,704,086 and 62,621,268 shares issued and outstanding at June 30, 2011 and December 31, 2010, respectively	647	647
Additional paid-in capital	98,965,932	97,122,085
Treasury stock, 5,013,450 and 2,091,600 shares at June 30, 2011 and December 31, 2010, respectively	(27,208,053)	(14,708,237)
Retained earnings	32,910,091	35,185,191
Accumulated other comprehensive loss	(13,353)	(35,445)
Total stockholders' equity	104,655,264	117,564,241
Total liabilities and stockholders' equity	$ 125,552,818	$ 136,186,935