Restricted cash — Restricted cash as of September 30, 2020 includes proceeds received from the sale of 6,643,559 shares of Telcon RF Pharmaceutical, Inc., a Korean corporation (formerly, Telcon Inc. and herein “Telcon”) which were earmarked for the purchase of a Telcon convertible bond, described in Note 5. Reconciliation of cash, cash equivalent and restricted cash in the condensed consolidated statements of cash flows is as follows: