Stockholders' Equity (Details) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Feb. 25, 2011 $ / shares shares	Mar. 31, 2015 shares	May. 31, 2014 Tranche $ / shares shares	Jun. 30, 2015 USD ($) shares	Jun. 30, 2014 USD ($) shares	Jun. 30, 2015 USD ($) shares	Jun. 30, 2014 USD ($) shares	Dec. 31, 2014 shares	Nov. 30, 2013 $ / shares shares
Convertible Preferred Stock and Stockholders' Equity
Warrant expense (reduction) | $						$ (480)	$ 4,668
Third party marketing firm
Convertible Preferred Stock and Stockholders' Equity
Shares issued for exercise of warrants (in shares)		959,676
Common Stock purchase warrants | Vulcan
Convertible Preferred Stock and Stockholders' Equity
Shares that may be purchased under warrant (in shares)									666,666
Exercise price of warrants (in dollars per share) | $ / shares									$ 15.00
Common Stock purchase warrants | Third party marketing firm
Convertible Preferred Stock and Stockholders' Equity
Exercise price of warrants (in dollars per share) | $ / shares	$ 6.02
Warrant expense (reduction) | $					$ 400		$ 2,300
Number of shares under warrants that have been earned (in shares)					104,992		343,665
Number of shares exercised through a net settlement (in shares)		1,433,333
Common Stock purchase warrants | Service provider
Convertible Preferred Stock and Stockholders' Equity
Exercise price of warrants (in dollars per share) | $ / shares			$ 12.81
Warrant expense (reduction) | $				$ (400)	$ 400	$ (600)	$ 400
Number of shares under warrants that have been earned (in shares)						114,583		33,333
Warrant vesting period			4 years
Period of warrant			5 years
Period of warrant from termination date of agreement			12 months
Common Stock purchase warrants | USAA
Convertible Preferred Stock and Stockholders' Equity
Warrant expense (reduction) | $				$ 100	$ 1,600	$ 100	$ 1,900
Number of shares under warrants that have been earned (in shares)				17,332	201,056	19,998	340,558
Common Stock purchase warrants | USAA | Affinity group marketing agreement
Convertible Preferred Stock and Stockholders' Equity
Shares that may be purchased under warrant (in shares)			1,458,979
Number of warrant tranches | Tranche			2
Common Stock purchase warrants | USAA | Affinity group marketing agreement | Tranche one
Convertible Preferred Stock and Stockholders' Equity
Shares that may be purchased under warrant (in shares)			392,313
Exercise price of warrants (in dollars per share) | $ / shares			$ 7.95
Common Stock purchase warrants | USAA | Affinity group marketing agreement | Tranche two
Convertible Preferred Stock and Stockholders' Equity
Shares that may be purchased under warrant (in shares)			1,066,666
Exercise price of warrants (in dollars per share) | $ / shares			$ 15.00
Maximum | Common Stock purchase warrants | Third party marketing firm
Convertible Preferred Stock and Stockholders' Equity
Maximum number of shares under warrant agreement (in shares)	1,433,333
Maximum | Common Stock purchase warrants | Service provider
Convertible Preferred Stock and Stockholders' Equity
Maximum number of shares under warrant agreement (in shares)			333,333