Stock Options (Details 3) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Options Outstanding
Outstanding at the end of the period (in shares)	2,779
Weighted Average Remaining Contractual Life	5 years 11 days
Weighted Average Exercise Price (in dollars per share)	$ 0.78
Options Exercisable
Exercisable at the end of the period (in shares)	2,012
Weighted Average Exercise Price (in dollars per share)	$ 0.84
$0.20-$0.50
Stock Options Outstanding and Exercisable
Exercise price, low end of range (in dollars per share)	$ 0.20
Exercise price, high end of range (in dollars per share)	$ 0.50
Options Outstanding
Outstanding at the end of the period (in shares)	1,625
Weighted Average Remaining Contractual Life	4 years 9 months 25 days
Weighted Average Exercise Price (in dollars per share)	$ 0.33
Options Exercisable
Exercisable at the end of the period (in shares)	1,465
Weighted Average Exercise Price (in dollars per share)	$ 0.32
$0.51-$1.00
Stock Options Outstanding and Exercisable
Exercise price, low end of range (in dollars per share)	$ 0.51
Exercise price, high end of range (in dollars per share)	$ 1.00
Options Outstanding
Outstanding at the end of the period (in shares)	773
Weighted Average Remaining Contractual Life	6 years 11 months 5 days
Weighted Average Exercise Price (in dollars per share)	$ 0.70
Options Exercisable
Exercisable at the end of the period (in shares)	167
Weighted Average Exercise Price (in dollars per share)	$ 0.71
$1.01-$3.00
Stock Options Outstanding and Exercisable
Exercise price, low end of range (in dollars per share)	$ 1.01
Exercise price, high end of range (in dollars per share)	$ 3.00
Options Outstanding
Outstanding at the end of the period (in shares)	128
Weighted Average Remaining Contractual Life	1 year 8 months 8 days
Weighted Average Exercise Price (in dollars per share)	$ 2.42
Options Exercisable
Exercisable at the end of the period (in shares)	128
Weighted Average Exercise Price (in dollars per share)	$ 2.42
$3.01-$5.44
Stock Options Outstanding and Exercisable
Exercise price, low end of range (in dollars per share)	$ 3.01
Exercise price, high end of range (in dollars per share)	$ 5.44
Options Outstanding
Outstanding at the end of the period (in shares)	253
Weighted Average Remaining Contractual Life	2 years 3 months 18 days
Weighted Average Exercise Price (in dollars per share)	$ 3.12
Options Exercisable
Exercisable at the end of the period (in shares)	252
Weighted Average Exercise Price (in dollars per share)	$ 3.12