CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Gain (Loss) [Member]	Accumulated Deficit [Member]	Total	Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2009	$ 17	$ 260,981	$ 3	$ (235,080)	$ 25,921	$ (6,195)
Balance (in shares) at Dec. 31, 2009	17,145
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued upon exercise of stock option	0	1	0	0	1
Common stock issued upon exercise of stock option (in shares)	1
Common stock issued for employee stock purchase plan	0	38	0	0	38
Common stock issued for employee stock purchase plan (in shares)	41
Issuance of restricted stock	0	46	0	0	46
Issuance of restricted stock (in shares)	35
Stock-based compensation	0	674	0	0	674
Comprehensive income (loss):
Unrealized gain on securities, net	0	0	(2)	0	(2)	(2)
Net income (loss)	0	0	0	975	975	975
Balance at Dec. 31, 2010	17	261,740	1	(234,105)	27,653	973
Balance (in shares) at Dec. 31, 2010	17,222				17,222
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued upon exercise of stock option	0	49	0	0	49
Common stock issued upon exercise of stock option (in shares)	42
Common stock issued for employee stock purchase plan	0	31	0	0	31
Common stock issued for employee stock purchase plan (in shares)	24
Stock-based compensation	0	381	0	0	381
Comprehensive income (loss):
Unrealized gain on securities, net	0	0	(25)	0	(25)	(25)
Net income (loss)	0	0	0	(2,508)	(2,508)	(2,508)
Balance at Dec. 31, 2011	$ 17	$ 262,201	$ (24)	$ (236,613)	$ 25,581	$ (2,533)
Balance (in shares) at Dec. 31, 2011	17,288				17,288