Note 3 - Investments (Tables)

9 Months Ended

Jun. 30, 2022

Notes Tables

Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]

	June 30, 2022
(In thousands)	Cost		Unrealized Gains		Unrealized Losses		Fair Value
Short-Term
Certificates of deposit		3,962		1		69		3,894
Investment securities – short-term	$	3,962	$	1	$	69	$	3,894
Long-Term
U.S treasury securities	$	16,167	$	-	$	825	$	15,342
Certificates of deposit		10,000		1		348		9,652
Investment securities – long-term	$	26,167	$	1	$	1,173	$	24,994

Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]

	In Unrealized Loss Position For Less Than 12 Months				In Unrealized Loss Position For Greater Than 12 Months
(In thousands)	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
U.S treasury securities	$	15,342	$	825	$	-	$	-
Certificates of deposit		9,637		267		3,569		151
Investment securities	$	24,979	$	1,092	$	3,569	$	151