Stockholders' Equity (Schedule of Summary of Activity Under Stock Options Plans)(Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity [Abstract]
Shares, Outstanding, Beginning of Year	366
Shares, Granted	375
Shares, Exercised	(11)
Shares, Forfeited	(48)
Shares, Expired	(18)
Shares, Outstanding, End of Year	664
Shares, Exercisable, End of Year	209
Shares, Vested and Expected to Vest, End of Year	533
Weighted-Average Exercise Price, Outstanding, Beginning of Year	$ 14.88
Weighted-Average Exercise Price, Granted	$ 9.49
Weighted-Average Exercise Price, Exercised	$ 9.23
Weighted-Average Exercise Price, Forfeited	$ 9.06
Weighted-Average Exercise Price, Expired	$ 24.39
Weighted-Average Exercise Price, Outstanding, End of Year	$ 12.08
Weighted-Average Exercise Price, Exercisable, End of Year	$ 17.02
Weighted-Average Exercise Price, Vested and Expected to Vest, End of Year	$ 12.66
Weighted-Average Remaining Contractual Term, Outstanding, End of Year	8 years 4 months 15 days
Weighted-Average Remaining Contractual Term, Exercisable, End of Year	6 years 5 months 21 days
Weighted-Average Remaining Contractual Term, Vested and Expected to Vest, End of Year	8 years 1 month 10 days
Total Intrinsic Value, exercised	$ 11
Aggregate Intrinsic Value, Outstanding, End of Year	150
Aggregate Intrinsic Value, Exercisable, End of Year	42
Aggregate Intrinsic Value, Vested and Expected to Vest, End of Year	$ 120