Annual report pursuant to Section 13 and 15(d)

Note 5 - Cash, Cash Equivalents and Investments - Investments (Details)

v3.23.1
Note 5 - Cash, Cash Equivalents and Investments - Investments (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2022
USD ($)
Amortized cost $ 20,607
Unrealized gains 0
Unrealized losses (73)
Fair value 20,534
US Treasury Securities [Member]  
Amortized cost 3,575
Unrealized gains 0
Unrealized losses (2)
Fair value $ 3,573
US Treasury Securities [Member] | Minimum [Member]  
Contractual Maturity Period (Day) 47 days
Debt Security, Government, Non-US [Member]  
Contractual Maturity Period (Day) 74 days
Amortized cost $ 899
Unrealized gains 0
Unrealized losses (3)
Fair value $ 896
Asset-Backed Securities [Member]  
Contractual Maturity Period (Day) 15 days
Amortized cost $ 500
Unrealized gains 0
Unrealized losses (1)
Fair value 499
Corporate Bond Securities [Member]  
Amortized cost 15,633
Unrealized gains 0
Unrealized losses (67)
Fair value $ 15,566
Corporate Bond Securities [Member] | Maximum [Member]  
Contractual Maturity Period (Day) 228 days