Restricted Cash

3 Months Ended

Mar. 31, 2015

Restricted Cash and Investments [Abstract]

Restricted Cash

Restricted Cash

As of March 31, 2015, our cash balance of $1,871,000 included restricted cash of $148,000. The $148,000 letter of credit that serves as the security deposit for our lease of office space in Colorado (as discussed in Note 12) is secured by an equal amount of cash pledged as collateral and such cash is held in a restricted bank account. As of December 31, 2014, our cash balance of $1,938,000 included restricted cash of $185,000.