CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 17,420	$ 17,543
Short-term investment securities	37,516	33,596
Accounts receivable, net of allowance for doubtful accounts of $233 and $222 at September 30, 2013 and December 31, 2012, respectively	17,275	18,586
Inventories, net	15,238	17,573
Deferred tax assets, net	1,484	1,484
Prepaid expenses and other assets	1,304	2,160
Total current assets	90,237	90,942
Property and equipment, net	14,619	14,775
Goodwill	161	161
Intangible assets, net	5,199	7,004
Deferred tax assets, net	12,441	14,034
Other noncurrent assets	1,796	1,636
Assets of discontinued operations	0	18
TOTAL ASSETS	124,453	128,570
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	3,842	10,557
Accrued liabilities	6,577	5,899
Total current liabilities	10,419	16,456
Contingent consideration	0	1,130
Other long-term liabilities	2,905	2,736
Liabilities of discontinued operations	0	103
Total long-term liabilities	2,905	3,969
Total liabilities	13,324	20,425
Stockholders' equity:
Common stock, $0.001 par value, 100,000,000 shares authorized, 18,530,551 and 18,514,809 shares issued and outstanding at September 30, 2013 and December 31, 2012, respectively	19	19
Additional paid-in capital	142,496	140,388
Accumulated deficit	(31,570)	(32,410)
Accumulated other comprehensive income	184	148
Total equity	111,129	108,145
TOTAL LIABILITIES AND EQUITY	$ 124,453	$ 128,570