Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 32,386	$ 55,509
Marketable securities	337	0
Receivables, net of allowance for doubtful accounts of $55 and $60, respectively	8,439	8,388
Inventories, net	12,304	10,873
Deferred income taxes	3,148	3,148
Prepaid expenses and other assets	1,785	1,369
Total current assets	58,399	79,287
Long-term marketable securities	8,873	0
Long-term inventories, net	1,609	1,955
Property and equipment, net	1,783	1,708
Intangibles, net	3,996	4,258
Goodwill	3,472	3,472
Deferred income taxes	1,195	1,195
Other assets	61	64
Total assets	79,388	91,939
Current Liabilities:
Accounts payable	3,031	2,302
Accrued liabilities	2,009	2,143
Income taxes payable	0	14,782
Deferred product revenue	4,300	3,593
Total current liabilities	9,340	22,820
Deferred rent	365	422
Other long-term liabilities	2,028	2,029
Total liabilities	11,733	25,271
Shareholders' equity:
Common stock, par value $0.001, 50,000,000 shares authorized, 9,080,060 and 9,163,462 shares issued and outstanding	9	9
Additional paid-in capital	39,729	40,430
Accumulated other comprehensive loss	(87)	0
Retained earnings	28,004	26,229
Total shareholders' equity	67,655	66,668
Total liabilities and shareholders' equity	$ 79,388	$ 91,939