Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 6,332	$ 5,492
Accounts receivable, net of allowance for doubtful accounts of $136 and $174, respectively	7,938	8,866
Inventories, net	12,401	11,901
Deferred tax asset, current	1,170	53
Other current assets	1,050	967
Total current assets	28,891	27,279
Property and equipment, net	4,869	5,486
Goodwill	1,000	999
Deferred tax asset, net of current portion	27,134	29,284
Total assets	61,894	63,048
Current liabilities:
Accounts payable	3,999	4,162
Accrued liabilities	2,311	3,087
Accrued compensation	1,077	521
Current portion of deferred revenue	1,902	1,811
Line of credit		3,079
Total current liabilities	9,289	12,660
Deferred revenue, net of current portion, and other	4,166	4,590
Total liabilities	13,455	17,250
Stockholders' equity:
Preferred stock, $.01 par value, 2,500,000 shares authorized; none issued or outstanding
Common stock, $.01 par value, 7,500,000 shares authorized; none issued and outstanding
Public common stock, $.01 par value, 7,500,000 shares authorized; 5,231,245 and 5,250,328 shares issued and outstanding, respectively	52	52
Additional paid-in capital	217,778	217,240
Accumulated other comprehensive income	242	284
Accumulated deficit	(169,633)	(171,778)
Total stockholders' equity	48,439	45,798
Total liabilities and stockholders' equity	$ 61,894	$ 63,048