CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 18,330	$ 17,543
Short-term investment securities	33,151	33,596
Accounts receivable, net of allowance for doubtful accounts of $239 and $222 at June 30, 2013 and December 31, 2012, respectively	18,337	18,586
Inventories, net	16,108	17,573
Deferred tax assets, net	1,484	1,484
Prepaid expenses and other assets	1,164	2,160
Total current assets	88,574	90,942
Property and equipment, net	14,671	14,775
Goodwill	161	161
Intangible assets, net	5,795	7,004
Deferred tax assets, net	12,989	14,034
Other noncurrent assets	1,727	1,636
Assets of discontinued operations	0	18
TOTAL ASSETS	123,917	128,570
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	5,752	10,557
Accrued liabilities	5,751	5,899
Total current liabilities	11,503	16,456
Contingent consideration	0	1,130
Other long-term liabilities	2,781	2,736
Liabilities of discontinued operations	0	103
Total long-term liabilities	2,781	3,969
Total liabilities	14,284	20,425
Stockholders' equity:
Common stock, $0.001 par value, 100,000,000 shares authorized, 18,445,099 and 18,514,809 shares issued and outstanding at June 30, 2013 and December 31, 2012, respectively	18	19
Additional paid-in capital	141,122	140,388
Accumulated deficit	(31,675)	(32,410)
Accumulated other comprehensive income	168	148
Total equity	109,633	108,145
TOTAL LIABILITIES AND EQUITY	$ 123,917	$ 128,570