Note 6 - Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2024

Notes Tables

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	March 31, 2024
	Cost Basis		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value		Cash Equivalents		Short-term Securities		Long-term Securities
Level 1:
Money market funds	$	1,437	$	-	$	-		$	1,437	$	1,437	$	-	$	-
Level 2:
Certificates of deposit		552		-		-			552		-		552		-
Municipal securities		1,105		-		(1	)		1,104		-		1,104		-
Corporate bonds		1,357		-		(2	)		1,355		-		1,355		-
Subtotal		3,014		-		(3	)		3,011		-		3,011		-
Total	$	4,451	$	-	$	(3	)	$	4,448	$	1,437	$	3,011	$	-

	September 30, 2023
	Cost Basis		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value		Cash Equivalents		Short-term Securities		Long-term Securities
Level 1:
Money market funds	$	2,307	$	-	$	-		$	2,307	$	2,307	$	-	$	-
Level 2:
Certificates of deposit		301		-		-			301		-		301		-
Municipal securities		926		-		(7	)		919		-		919		-
Corporate bonds		264		-		(3	)		261		-		261		-
Subtotal		1,491		-		(10	)		1,481		-		1,481		-
Total	$	3,798	$	-	$	(10	)	$	3,788	$	2,307	$	1,481	$	-

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

	As of March 31, 2024
	In loss position < 12 months					In loss position > 12 months					Total in loss position
	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
Certificates of deposit	$	-	$	-		$	-	$	-		$	-	$	-
U.S. government agency bonds		-		-			-		-			-		-
Municipal securities		243		(1	)		-		-			243		(1	)
Corporate bonds		993		(1	)		362		(1	)		1,355		(2	)
	$	1,236	$	(2	)	$	362	$	(1	)	$	1,598	$	(3	)

	As of September 30, 2023
	In loss position < 12 months					In loss position > 12 months					Total in loss position
	Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss			Fair Value		Gross Unrealized Loss
Certificates of deposit	$	-	$	-		$	-	$	-		$	-	$	-
U.S. government agency bonds		-		-			-		-			-		-
Municipal securities		684		(2	)		235		(5	)		919		(7	)
Corporate bonds		-		-			261		(3	)		261		(3	)
	$	684	$	(2	)	$	496	$	(8	)	$	1,180	$	(10	)

Business Combination, Fair Value Measurement of Acquired Intangible Assets [ Table Text Block]

			Fair Value Measurements at March 31, 2024
	Carrying Value		(Level 1)		(Level 2)		(Level 3)		Gain/(Loss)
Intangible assets from Evertel acquisition	$	2,550	$	-	$	-	$	2,550	$	-
Goodwill from Evertel acquisition	$	2,923	$	-	$	-	$	2,923	$	-

Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]

Value as of acquisition date	$	890
Remeasurement estimate		44
Settlement of contingent consideration liability		(874	)
Balance as of March 31, 2024	$	60

Balance as of acquisition date	$	230
Accretion		10
Balance as of March 31, 2024	$	240