Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 5,784	$ 6,332
Accounts receivable, net of allowance for doubtful accounts of $174 and $155, respectively	11,044	7,938
Inventories, net	12,483	12,401
Deferred tax asset, current	1,130	1,170
Other current assets	2,514	1,050
Total current assets	32,955	28,891
Property and equipment, net	6,005	4,869
Goodwill	1,120	1,000
Deferred tax asset, net of current portion	26,746	27,134
Total assets	66,826	61,894
Current liabilities:
Accounts payable	5,298	3,999
Accrued liabilities	3,481	2,311
Accrued compensation	651	1,077
Current portion of deferred revenue	2,407	1,902
Line of credit	2,552
Total current liabilities	14,389	9,289
Deferred revenue, net of current portion, and other	3,575	4,166
Total liabilities	17,964	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; none issued and outstanding
Public common stock, $.01 par value, 7,500,000 shares authorized; 5,250,328 and 5,372,336 shares issued and outstanding, respectively	54	52
Additional paid-in capital	218,544	217,778
Accumulated other comprehensive income	296	242
Accumulated deficit	(170,032)	(169,633)
Total stockholders' equity	48,862	48,439
Total liabilities and stockholders' equity	$ 66,826	$ 61,894