Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 7,624	$ 6,332
Accounts receivable, net of allowance for doubtful accounts of $174 and $108, respectively	8,095	7,938
Inventories, net	11,688	12,401
Deferred tax asset, current	891	1,170
Other current assets	1,430	1,050
Total current assets	29,728	28,891
Property and equipment, net	5,188	4,869
Goodwill	1,074	1,000
Deferred tax asset, net of current portion	27,196	27,134
Total assets	63,186	61,894
Current liabilities:
Accounts payable	3,891	3,999
Accrued liabilities	3,953	3,388
Dividends payable	534	0
Current portion of deferred revenue	2,139	1,902
Line of credit	0	0
Total current liabilities	10,517	9,289
Deferred revenue, net of current portion, and other	3,905	4,166
Total liabilities	14,422	13,455
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; 0 shares issued and outstanding
Public common stock, $.01 par value, 7,500,000 shares authorized; 5,250,328 and 5,348,719 shares issued and outstanding, respectively	54	52
Additional paid-in capital	218,356	217,778
Accumulated other comprehensive income	206	242
Accumulated deficit	(169,852)	(169,633)
Total stockholders' equity	48,764	48,439
Total liabilities and stockholders' equity	$ 63,186	$ 61,894