Equity-Based Compensation (Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Employee Vested Options [Member]	Dec. 31, 2013 Employee Vested Options [Member]	Mar. 31, 2014 Employee Nonvested Options [Member]	Dec. 31, 2013 Employee Nonvested Options [Member]	Mar. 31, 2014 Nonemployee Vested Options [Member]	Dec. 31, 2013 Nonemployee Vested Options [Member]	Mar. 31, 2014 Nonemployee Nonvested Options [Member]	Dec. 31, 2013 Nonemployee Nonvested Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of options outstanding (shares)			10,611,480		525,000		4,128,432		470,833
Number of options granted (shares)			0		0		0		0
Number of options vested (shares)					(216,667)				(175,000)
Number of options exercised (shares)							0
Number of options forfeited (shares)			0		0		0		0
Number of options outstanding (shares)			10,611,480	10,611,480	308,333	525,000	4,128,432	4,128,432	295,833	470,833
Number of options vested and expected to vest, outstanding (shares)			10,303,147				3,832,599
Number of options vested and expected to vest, exercisable (shares)			10,303,147				3,832,599
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Options Outstanding (usd per share)			$ 1.73		$ 0.29		$ 1.48		$ 0.25
Weighted Average Exercise Price, Options Granted (usd per share)			$ 0.00		$ 0.00		$ 0.00		$ 0.00
Weighted Average Exercise Price, Options Exercised (usd per share)							$ 0.00
Weighted Average Exercise Price, Options Vested (usd per share)					$ 0.27				$ 0.25
Weighted Average Exercise Price, Options Forfeited (usd per share)			$ 0.00		$ 0.00		$ 0.00		$ 0.00
Weighted Average Exercise Price, Options Outstanding (usd per share)			$ 1.73	$ 1.73	$ 0.30	$ 0.29	$ 1.48	$ 1.48	$ 0.25	$ 0.25
Weighted Average Exercise Price, Options Vested and Expected to Vest, Outstanding (usd per share)			$ 1.76				$ 1.79
Weighted Average Exercise Price, Options Vested and Expected to Vest, Exercisable (usd per share)			$ 1.76				$ 1.79
Share-based Compensation Arrangement By Share-based Payment Award, Options, Weighted Average Remaining Contractual Term [Roll Forward]
Weighted Average Remaining Contractual Term (Years), Options outstanding			4 years 8 months 1 day	4 years 11 months 1 day	7 years 3 months 11 days	8 years 4 months 17 days	4 years 9 months 4 days	5 years 0 months 4 days	9 years 4 months 10 days	9 years 7 months 10 days
Weighted Average Remaining Contractual Term (Years), Options Vested					9 years 4 months 2 days				9 years 4 months 10 days
Weighted Average Remaining Contractual Term (Years), Options outstanding			4 years 8 months 1 day	4 years 11 months 1 day	7 years 3 months 11 days	8 years 4 months 17 days	4 years 9 months 4 days	5 years 0 months 4 days	9 years 4 months 10 days	9 years 7 months 10 days
Weighted Average Remaining Contractual Term (Years), Options vested and expected to vest			4 years 4 months 28 days				4 years 5 months 19 days
Weighted Average Remaining Contractual Term (Years), Options exercisable			4 years 4 months 28 days				4 years 5 months 19 days
Share-based Compensation Arrangement By Share-based Payment Award, Options, Aggregate Intrinsic Value [Roll Forward]
Aggregate Intrinsic Value, Options Outstanding			$ 0		$ 0		$ 0		$ 0
Aggregate Intrinsic Value, Options Granted			0		0		0		0
Aggregate Intrinsic Value, Options Exercised							0
Aggregate Intrinsic Value, Options Vested					28				26
Aggregate Intrinsic Value, Options Forfeited			0		0		0		0
Aggregate Intrinsic Value, Options Outstanding			0	0	31	0	0	0	44	0
Aggregate Intrinsic Value, Options Vested and Expected to Vest, Outstanding			0				0
Aggregate Intrinsic Value, Options Vested and Expected to Vest, Exercisable			0				0
Stock issued during period, value	88	121
Total compensation cost not yet recognized	$ 261	$ 208