Fair Value Measurement (Narrative) (Details) $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended	12 Months Ended
	Apr. 08, 2013 shares	Nov. 30, 2014 shares	Sep. 30, 2015 USD ($) shares	Mar. 31, 2014 USD ($)	Sep. 30, 2015 USD ($) shares	Dec. 31, 2014 USD ($) $ / warrant	Feb. 18, 2014 shares
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stipulation of settlement, payment to plaintiff, warrants	250,000						250,000
Expected volatility rate						41.00%
Risk free interest rate						1.50%
Stipulation of settlement, payment to plaintiff, warrants, term	5 years					5 years
Warrants, fair value per share | $ / warrant						6.59
Liabilities, fair value adjustment | $				$ 0.4
Number of warrants exercised		152,500	0		0
Number of warrants outstanding		97,500
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents | $			$ 1.8		$ 1.8	$ 10.6