Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Fair Value Measurements - Fair Value Measurements (Details)

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Note 5 - Fair Value Measurements - Fair Value Measurements (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Jun. 30, 2022
Investments (2) [1] $ 55,030 $ 11,199
Total 63,860 62,234
Money Market Funds [Member]    
Corporate money market funds (1) [2] 8,830 51,035
Fair Value, Inputs, Level 1 [Member]    
Investments (2) [1] 0 0
Total 8,830 51,035
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]    
Corporate money market funds (1) [2] 8,830 51,035
Fair Value, Inputs, Level 2 [Member]    
Investments (2) [1] 55,030 11,199
Total 55,030 11,199
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]    
Corporate money market funds (1) [2] 0 0
Fair Value, Inputs, Level 3 [Member]    
Investments (2) [1] 0 0
Total 0 0
Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]    
Corporate money market funds (1) [2] $ 0 $ 0
[1] Our investments as of December 31, 2022 consist solely of U.S. Treasury Bills with maturities of less than one year. Previously held investments included fixed income securities including municipal bonds, commercial paper and certificates of deposits with maturities of less than one year. We classify our investments as available-for-sale debt investments. The fair value of our underlying investments is based on observable inputs. Our investments are classified as Level 2 and are included in Investments (short-term) within the consolidated balance sheets. All unrealized gains and losses were included in Accumulated Other Comprehensive Loss within the consolidated balance sheets. There were no material gross unrealized gains or losses on the investments at December 31, 2022 or June 30, 2022.
[2] We invest excess cash in money market accounts and short-term investments. Our corporate money market funds are readily convertible into cash and the net asset value of each fund on the last day of the quarter is used to determine its fair value. Our corporate money market funds are classified as Level 1 assets and are included in Cash and cash equivalents within the consolidated balance sheets.