Stockholders' Equity (Summary of Stock Option Activity) (Details) - $ / shares	1 Months Ended		3 Months Ended	9 Months Ended
	Apr. 30, 2015	Oct. 31, 2014	Sep. 30, 2015	Sep. 30, 2015	Jun. 30, 2014
Number of Shares
Balance at the beginning of the period (in shares)			334,686	334,686
Options granted (in shares)				296,045
Options exercised (in shares)
Options cancelled (forfeited) (in shares)				(96,158)
Options cancelled (expired) (in shares)				(7,453)
Balance at the end of the period (in shares)			527,120	527,120
Weighted-Average Exercise Price (Per Share)
Balance at the beginning of the period (in dollars per share)			$ 34.00	$ 34.00
Options granted (in dollars per share)				3.59
Options exercised (in dollars per share)
Options forfeited (in dollars per share)				24.55
Options expired (in dollars per share)				18.22
Balance at the ending of the period (in dollars per share)			18.84	18.84
Weighted-average fair value of options granted during the period			$ 1.90	$ 2.23
Equity Incentive Plan 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				4 years
Vesting period expiration				10 years
Employee Stock Purchase Plan 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period expiration				6 months
Look-back period for payroll deductions to acquire ownership interest				6 months
Weighted-Average Exercise Price (Per Share)
Shares issued during period	375	583
Fair market value percentage of ordinary shares			85.00%	85.00%
Number of shares authorized to be issued under the plan, before 2001 Plan additions					21,058
Shares available for grant			20,100	20,100
Restricted Stock Units (RSUs) [Member]
Weighted-Average Exercise Price (Per Share)
Shares issued during period			3,750	3,750