Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 39,638	$ 29,335
Investment securities available for sale	0	4,327
Trade accounts receivable, less allowance for doubtful accounts and sales returns of $602 and $790, respectively	18,123	15,664
Inventories, net	8,542	8,054
Deferred income taxes, current portion, net	610	163
Prepaid expenses and other current assets	2,421	1,568
Total current assets	69,334	59,111
Property and equipment, net	27,249	28,669
Goodwill	11,569	5,569
Other intangible assets, net	111	300
Other assets	773	46
Total assets	109,036	93,695
Current liabilities:
Accounts payable	1,521	1,392
Accrued liabilities	24,256	14,916
Deferred revenue	2,183	2,291
Total current liabilities	27,960	18,599
Accrued liabilities, net of current portion	706	598
Deferred income taxes, noncurrent portion, net	860	0
Total liabilities	29,526	19,197
Commitments and contingencies (Note 19)
Stockholders’ equity:
Preferred stock, $0.001 par value. Authorized 5,000,000 shares; none issued	0	0
Common stock, $0.001 par value. Authorized 60,000,000 shares; issued and outstanding 33,957,408 and 33,190,732 shares, respectively	34	33
Additional paid-in capital	176,277	171,890
Accumulated other comprehensive loss	(715)	(445)
Accumulated deficit	(96,086)	(96,980)
Total stockholders’ equity	79,510	74,498
Total liabilities and stockholders’ equity	$ 109,036	$ 93,695