Stockholders' Equity (Common Stock Shares Reserved for Future Issuance) (Details)	Mar. 31, 2015
Class of Stock [Line Items]
Common stock shares reserved for future issuance	6,951,765
Convertible preferred shares (series A - B) [Member]
Class of Stock [Line Items]
Common stock shares reserved for future issuance	73,332
Additional stock issuable related to conversion of preferred stock (series A - B) [Member]
Class of Stock [Line Items]
Common stock shares reserved for future issuance	49,782
Common stock options outstanding [Member]
Class of Stock [Line Items]
Common stock shares reserved for future issuance	2,595,426
Common stock warrants outstanding [Member]
Class of Stock [Line Items]
Common stock shares reserved for future issuance	1,755,330
Restricted share units outstanding [Member]
Class of Stock [Line Items]
Common stock shares reserved for future issuance	672,000
Common stock equivalents available for grant [Member]
Class of Stock [Line Items]
Common stock shares reserved for future issuance	1,805,895