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Note 7 - Marketable Securities - Summary of Marketable Securities (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Amortized cost basis	$ 67,380
Unrealized gains	0
Unrealized losses	(155)
Fair value	67,225
US Treasury and Government [Member]
Amortized cost basis	46,554
Unrealized gains	0
Unrealized losses	(102)
Fair value	46,452
Corporate Debt Securities [Member]
Amortized cost basis	4,416
Unrealized gains	0
Unrealized losses	(10)
Fair value	4,406
Commercial Paper [Member]
Amortized cost basis	12,336
Unrealized gains	0
Unrealized losses	(24)
Fair value	12,312
Certificates of Deposit [Member]
Amortized cost basis	4,074
Unrealized gains	0
Unrealized losses	(19)
Fair value	$ 4,055

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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