Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 2,772	$ 3,307
Accounts receivable, less allowance of $305 and $289 in 2012 and 2011, respectively	8,983	8,899
Inventory, net	10,337	11,312
Prepaid expenses and other current assets	1,163	1,808
Total current assets	23,255	25,326
Property, plant and equipment, net	1,338	1,148
Intangible assets, net	179	212
Goodwill	2,926	2,926
Deferred tax asset	8	8
Other assets	187	187
Total assets	27,893	29,807
Current liabilities:
Accounts payable	7,524	7,804
Accrued liabilities	5,442	6,177
Customer deposits	20	165
Deferred revenue, current portion	2,232	2,136
Total current liabilities	15,218	16,282
Deferred tax liabilities	612	594
Deferred revenue, long-term	17	25
Other liabilities, long-term	139	337
Total liabilities	15,986	17,238
Commitments and contingencies (Notes 9 and 13)
Stockholders' equity:
Preferred stock, par value $0.001; 1,000 shares authorized, no shares issued and outstanding
Common stock, par value $0.001, 50,000 shares authorized; 32,769 and 32,502 shares issued in 2012 and 2011, respectively; and 30,805 and 30,538 shares outstanding in 2012 and 2011, respectively	33	33
Additional paid-in capital	139,454	138,507
Accumulated other comprehensive loss	(297)	(360)
Accumulated deficit	(110,884)	(109,212)
Stockholders' equity excluding treasury stock	28,306	28,968
Treasury stock (cost of 1,964 shares repurchased)	(16,399)	(16,399)
Total stockholders' equity	11,907	12,569
Total liabilities and stockholders' equity	$ 27,893	$ 29,807