Stockholders' Equity (Common Stock Shares Reserved for Future Issuance) (Details)	Mar. 31, 2013
Class of Stock [Line Items]
Common stock shares reserved for future issuance	5,565,952
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 [Member]
Class of Stock [Line Items]
Common stock shares reserved for future issuance	189,205
Common stock options outstanding [Member]
Class of Stock [Line Items]
Common stock shares reserved for future issuance	1,794,401
Common stock warrants outstanding [Member]
Class of Stock [Line Items]
Common stock shares reserved for future issuance	2,743,050
Restricted share units outstanding [Member]
Class of Stock [Line Items]
Common stock shares reserved for future issuance	764,000
Common stock equivalents available for grant [Member]
Class of Stock [Line Items]
Common stock shares reserved for future issuance	1,964