Quarterly report pursuant to Section 13 or 15(d)

FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS - Fair value on a recurring basis (Details)

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FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS - Fair value on a recurring basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Jun. 30, 2023
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Marketable debt securities $ 83,446 $ 102,330
Recurring    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Financial assets measured at fair value 94,208 112,274
Recurring | Money market funds    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Cash and cash equivalents 5,272 5,464
Recurring | Corporate commercial paper    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Cash and cash equivalents 1,990 4,481
Marketable debt securities 32,752 41,597
Recurring | U.S. Government agencies    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Marketable debt securities 18,749 26,394
Recurring | U.S. Government treasuries    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Cash and cash equivalents 3,500  
Marketable debt securities 997 10,404
Recurring | Corporate notes and bonds    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Marketable debt securities 27,596 19,240
Recurring | Asset-backed securities    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Marketable debt securities 3,352 4,694
Recurring | Level 1    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Financial assets measured at fair value 11,759 20,349
Recurring | Level 1 | Money market funds    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Cash and cash equivalents 5,272 5,464
Recurring | Level 1 | Corporate commercial paper    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Cash and cash equivalents 1,990 4,481
Recurring | Level 1 | U.S. Government treasuries    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Cash and cash equivalents 3,500  
Marketable debt securities 997 10,404
Recurring | Level 2    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Financial assets measured at fair value 82,449 91,925
Recurring | Level 2 | Corporate commercial paper    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Marketable debt securities 32,752 41,597
Recurring | Level 2 | U.S. Government agencies    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Marketable debt securities 18,749 26,394
Recurring | Level 2 | Corporate notes and bonds    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Marketable debt securities 27,596 19,240
Recurring | Level 2 | Asset-backed securities    
FINANCIAL INSTRUMENTS AND SIGNIFICANT CONCENTRATIONS    
Marketable debt securities $ 3,352 $ 4,694