Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 54,747	$ 53,084
Accounts receivable, net of allowance of $0 and $6 as of December 31, 2014 and December 31, 2013, respectively	7,637	9,719
Inventories, net	17,752	20,186
Prepaid expenses and other current assets	2,856	4,202
Total current assets	82,992	87,191
Property and equipment, net	1,601	2,465
Goodwill	1,973	0
Other intangible assets, net	1,188	0
Other long-term assets	83	50
Total assets	87,837	89,706
Current liabilities:
Accounts payable	13,104	10,250
Deferred revenue	3,290	2,828
Accrued and other liabilities	7,696	6,661
Total current liabilities	24,090	19,739
Other long-term liabilities	925	0
Total liabilities	25,015	19,739
Commitments and contingencies (Note 5)
Stockholders’ equity:
Preferred stock, $0.001 par value; 1,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.001 par value; authorized — 25,000; issued — 7,005 and 6,901 shares, as of December 31, 2014 and December 31, 2013, respectively; outstanding — 6,720 and 6,639 shares as of December 31, 2014 and December 31, 2013, respectively	7	7
Treasury stock, 285 shares at December 31, 2014 and 263 shares at December 31, 2013	(3,834)	(3,479)
Additional paid-in capital	818,308	816,826
Accumulated other comprehensive income	16	16
Accumulated deficit	(751,675)	(743,403)
Total stockholders’ equity	62,822	69,967
Total liabilities and stockholders’ equity	$ 87,837	$ 89,706