Stockholders' Equity, Stock Option (Details) (Stock Options [Member], USD $)	12 Months Ended			3 Months Ended			12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2012	Dec. 31, 2011
Outstanding options, additional disclosures [Abstract]
Options exercised in period, total intrinsic value	$ 71,000	$ 8,900,000	$ 2,400,000
Fair value of options vested	845,000	1,700,000	2,800,000
Derived service period	4 years
Extension of the post-termination exercise period for outstanding stock option grants	90 days
Compensation cost not yet recognized [Abstract]
Unrecognized compensation cost related to stock options	1,800,000
Weighted average period of recognition for unrecognized compensation cost	2 years 0 months 11 days
Minimum [Member]
Outstanding options, additional disclosures [Abstract]
Estimated grant-date fair value (in dollars per share)				$ 1.27
Derived service period				1 year 10 months 13 days
Maximum [Member]
Outstanding options, additional disclosures [Abstract]
Estimated grant-date fair value (in dollars per share)				$ 1.33
Derived service period				4 years 6 months 7 days
President and Chief Executive Officer [Member]
Outstanding options, number of shares [Roll Forward]
Granted (in shares)				750,000		700,000
Outstanding options, additional disclosures [Abstract]
Stock options granted (in shares)				750,000		700,000
Stock-based compensation expense					193,000	810,000
Key Executives [Member]
Outstanding options, number of shares [Roll Forward]
Granted (in shares)				112,500
Outstanding options, additional disclosures [Abstract]
Stock options granted (in shares)				112,500
2010 Equity Performance Incentive Plan [Member]
Outstanding options, number of shares [Roll Forward]
Outstanding options, beginning of period (in shares)	5,382,391	9,529,597	10,789,590		5,382,391
Granted (in shares)	1,492,750	557,750	875,150
Exercised (in shares)	(376,804)	(4,266,423)	(1,375,431)
Forfeited (in shares)	(2,982,300)	(438,533)	(759,712)
Outstanding options, end of period (in shares)	3,516,037	5,382,391	9,529,597			9,529,597	10,789,590
Options vested and expected to vest (in shares)	3,336,740
Exercisable (in shares)	1,674,147
Outstanding options, weighted average exercise price per share [Roll Forward]
Outstanding options, beginning of period (in dollars per share)	$ 3.55	$ 3.05	$ 2.99		$ 3.55
Granted (in dollars per share)	$ 2.23	$ 4.74	$ 3.09
Exercised (in dollars per share)	$ 2.32	$ 2.52	$ 2.44
Forfeited (in dollars per share)	$ 3.50	$ 4.27	$ 3.39
Outstanding options, end of period (in dollars per share)	$ 3.16	$ 3.55	$ 3.05			$ 3.05	$ 2.99
Options vested and expected to vest (in dollars per share)	$ 3.18
Exercisable (in dollars per share)	$ 3.62
Outstanding options, additional disclosures [Abstract]
Outstanding options, weighted average remaining contractual term	6 years 3 months 11 days	3 years 7 months 28 days	3 years 7 months 17 days				4 years 3 months
Options vested and expected to vest, weighted average remaining contractual term	6 years 1 month 2 days
Exercisable, weighted average remaining contractual term	3 years 7 months 13 days
Outstanding options, aggregate intrinsic value	3,000	4,039,000	12,595,000			12,595,000	8,000
Options vested and expected to vest, aggregate intrinsic value	3,000
Exercisable, aggregate intrinsic value	$ 0
Stock options granted (in shares)	1,492,750	557,750	875,150