Stock Based Compensation (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2011	Apr. 01, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 649,000	$ 595,000
Compensation expense capitalized	0	0
No. of Shares [Roll Forward]
Outstanding at December 31, 2011 (in shares)	757,000
Options granted (in shares)	104,000
Exercised (in shares)	(14,000)
Forfeited and cancelled (in shares)	(130,000)
Outstanding at December 31, 2011 (in shares)	717,000	757,000
Vested and expected to vest at December 31, 2011 (in shares)	704,000
Total shares exercisable as of December 31, 2011 (in shares)	327,000
Shares remaining available for grant (in shares)	1,277,000
Weighted Average Exercise Price [Roll Forward]
Outstanding at December 31, 2010 (in dollars per share)	$ 5.47
Options granted (in dollars per share)	$ 4.91
Exercised (in dollars per share)	$ 1.72
Forfeited and cancelled (in dollars per share)	$ 5.74
Outstanding at December 31, 2011 (in dollars per share)	$ 5.37	$ 5.47
Vested and expected to vest at December 31, 2011 (in dollars per share)	$ 5.38
Total shares exercisable as of December 31, 2011 (in dollars per share)	$ 6.02
Aggregate Intrinsic Value [Abstract]
Outstanding at December 31, 2010	116,000	38,000
Outstanding at December 31, 2011	116,000	38,000
Vested and expected to vest at December 31, 2011	113,000
Total shares exercisable as of December 31, 2011	50,000
Weighted average grant date fair value of options granted (in dollars per share)	$ 2.04	$ 2.32
Total intrinsic value of options exercised	31,000	236,000
Assumptions used for fair value of options at the date of the grant [Abstract]
Expected option life	5 years 6 months	5 years 6 months
Weighted average risk-free interest rate (in hundredths)	0.90%	2.10%
Weighted average expected volatility (in hundredths)	45.00%	53.00%
Expected dividend yield (in hundredths)	0.00%	0.00%
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Unrecognized compensation expense	432,000
Period for recognition	2013 through 2016
Weighted average grant date fair value [Roll Forward]
Balance at January 1, 2011 (in dollars per share)	$ 4.68	$ 3.88
Granted (in dollars per share)	$ 4.86
Vested (in dollars per share)	$ 5.18
Forfeited and cancelled (in dollars per share)	$ 4.78
Balance at December 31, 2011 (in dollars per share)	$ 4.68	$ 3.88
Restricted stock awards granted (in shares)	183,000	40,000
Share price (in dollars per share)	$ 0.02		$ 3.83	$ 4.60
Days prior to grant date considered for fair value of award	0 days
Weighted average grant date fair value (in dollars per share)	$ 4.86	$ 4.08
Shares released (in shares)	87,000	64,000
Restricted stock awards cancelled (in shares)	23,000
$3.22 - $4.81 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Range of Exercise Price (in dollars per share)	$ 3.22
Upper Range of Exercise Price (in dollars per share)	$ 4.81
Number Outstanding (in shares)	466,000
Weighted Average Remaining Life	7 years 9 months
Weighted Average Exercise Price (in dollars per share)	$ 4.67
$4.88 - $6.01 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Range of Exercise Price (in dollars per share)	$ 4.88
Upper Range of Exercise Price (in dollars per share)	$ 6.01
Number Outstanding (in shares)	155,000
Weighted Average Remaining Life	4 years 4 months
Weighted Average Exercise Price (in dollars per share)	$ 5.62
$6.25 - $11.40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Range of Exercise Price (in dollars per share)	$ 6.25
Upper Range of Exercise Price (in dollars per share)	$ 11.4
Number Outstanding (in shares)	96,000
Weighted Average Remaining Life	4 years 6 months
Weighted Average Exercise Price (in dollars per share)	$ 8.41
$3.22 - $11.40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Range of Exercise Price (in dollars per share)	$ 3.22
Upper Range of Exercise Price (in dollars per share)	$ 11.4
Number Outstanding (in shares)	717,000
Weighted Average Remaining Life	6 years 8 months
Weighted Average Exercise Price (in dollars per share)	$ 5.37
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 302,000	$ 350,000
Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	60 months
Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	0 months
Non-vested equity awards [Member]
Activity of nonvested options outstanding [Roll Forward]
Balance at January 1, 2011 (in shares)	101,000
Granted (in shares)	183,000
Vested (in shares)	(87,000)
Forfeited and cancelled (in shares)	(23,000)
Balance at December 31, 2011 (in shares)	174,000
2005 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved under plan (in shares)	2,250,000
Expiration period	10 years
2005 Equity Incentive Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years
2005 Equity Incentive Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year