Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Accounts receivable, allowances	$ 438	$ 387
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, issued
Preferred stock, outstanding
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	4,927,931	4,781,597
Common stock, shares outstanding	4,927,931	4,781,597