Stock Options (Details 3) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Options Outstanding
Outstanding at the end of the period (in shares)	3,076
Weighted Average Remaining Contractual Life	3 years 11 months 27 days
Weighted Average Exercise Price (in dollars per share)	$ 0.74
Options Exercisable
Exercisable at the end of the period (in shares)	2,511
Weighted Average Exercise Price (in dollars per share)	$ 0.78
$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)	1,650
Weighted Average Remaining Contractual Life	3 years 8 months 19 days
Weighted Average Exercise Price (in dollars per share)	$ 0.35
Options Exercisable
Exercisable at the end of the period (in shares)	1,522
Weighted Average Exercise Price (in dollars per share)	$ 0.34
$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)	825
Weighted Average Remaining Contractual Life	4 years 7 months 28 days
Weighted Average Exercise Price (in dollars per share)	$ 0.68
Options Exercisable
Exercisable at the end of the period (in shares)	669
Weighted Average Exercise Price (in dollars per share)	$ 0.69
$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)	269
Weighted Average Remaining Contractual Life	7 years 8 months 12 days
Weighted Average Exercise Price (in dollars per share)	$ 1.84
Options Exercisable
Exercisable at the end of the period (in shares)	1
Weighted Average Exercise Price (in dollars per share)	$ 1.10
$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)	332
Weighted Average Remaining Contractual Life	7 months 21 days
Weighted Average Exercise Price (in dollars per share)	$ 3.02
Options Exercisable
Exercisable at the end of the period (in shares)	319
Weighted Average Exercise Price (in dollars per share)	$ 3.05