Stock Based Compensation (Recognized Stock-based Compensation) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized stock based compensation	$ 244	$ 186	$ 983	$ 737
Amortization of prepaid services	0	5	11	5
Employee | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized stock based compensation	88	55	277	343
Employee | Board stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized stock based compensation	61	26	182	79
Nonemployee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized stock based compensation	103	93	450	280
Total non-employee stock-based compensation expense	103	98	461	285
Nonemployee | Management restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized stock based compensation	10	2	112	19
Nonemployee | Board restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized stock based compensation	42	67	268	201
Warrant | Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized stock based compensation	43	31	133	90
Warrant | Employee | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized stock based compensation	$ 141	$ 88	$ 522	$ 452