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Restricted Cash	3 Months Ended
Restricted Cash	Mar. 31, 2014
Restricted Cash and Investments [Abstract]
Restricted Cash	Restricted Cash As of March 31, 2014, our cash balance of $2,186,000 included restricted cash of $185,000. The $185,000 letter of credit that serves as the security deposit for our lease of office space in Colorado (as discussed in Note 11) is secured by an equal amount of cash pledged as collateral and such cash is restricted by Comerica Bank. As of December 31, 2013, our cash balance of $2,294,000 included restricted cash of $242,000.