Note 7. Derivative Liabilities

The table below provides a summary of the changes in fair value, including net transfers in and/or out, of all financial assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the nine months ended March 31, 2021 (in thousands):

The fair value of the derivative features of the October 2018 Notes and the May 2018 Notes (as defined in Note 8 below) at the balance sheet dates were calculated using the with-and-without method, a form of the income approach, valued with the following assumptions:

Risk-free interest rate: The Company uses the risk-free interest rate of a U.S. Treasury Bill with a similar term on the date of the issuance.

Dividend yield: The Company uses a 0% expected dividend yield as the Company has not paid dividends to date and does not anticipate declaring dividends in the near future.

Volatility: The Company calculates the expected volatility of the stock price using the historical volatilities of the Company’s common stock traded on the Nasdaq Capital Market.

Remaining term: The Company’s remaining term is based on the remaining contractual term of the convertible notes.