CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Gain (Loss) [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2010	$ 17	$ 261,740	$ 1	$ (234,105)	$ 0	$ 27,653
Balance (in shares) at Dec. 31, 2010	17,222				0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued upon exercise of stock option	0	49	0	0	0	49
Common stock issued upon exercise of stock option (in shares)	42				0	42
Common stock issued for employee stock purchase plan	0	31	0	0	0	31
Common stock issued for employee stock purchase plan (in shares)	24				0
Stock-based compensation	0	381	0	0	0	381
Change in accumulated other comprehensive loss	0	0	(25)	0	0	(25)
Net loss	0	0	0	(2,508)	0	(2,508)
Balance at Dec. 31, 2011	17	262,201	(24)	(236,613)	0	25,581
Balance (in shares) at Dec. 31, 2011	17,288				0	17,288
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued upon exercise of stock option	0	3	0	0	0	3
Common stock issued upon exercise of stock option (in shares)	2				0	2
Common stock issued for employee stock purchase plan	0	14	0	0	0	14
Common stock issued for employee stock purchase plan (in shares)	16				0
Stock-based compensation	0	245	0	0	0	245
Treasury stock at cost	0	0	0	0	(48)	(48)
Treasury stock at cost (in shares)	0				(56)
Change in accumulated other comprehensive loss	0	0	(22)	0	0	(22)
Net loss	0	0	0	(11,047)	0	(11,047)
Balance at Dec. 31, 2012	$ 17	$ 262,463	$ (46)	$ (247,660)	$ (48)	$ 14,726
Balance (in shares) at Dec. 31, 2012	17,305				(56)	17,305