Note 8 - Leases (Tables)

6 Months Ended

Mar. 31, 2023

Notes Tables

Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]

For fiscal years ending September 30,
2023 (remainder)	$	147
2024		278
2025		186
2026		130
2027		134
2028		91
Future minimum lease payments		966
Less interest		(64	)
Present value of minimum lease payments		902
Less current portion		(248	)
Non-current portion	$	654

Lease, Cost [Table Text Block]

	Three Months Ended				Six Months Ended
	March 31, 2023		March 31, 2022		March 31, 2023		March 31, 2022
Right-of-use operating lease costs	$	68	$	68	$	136	$	136
Short-term lease costs		90		52		132		96
Total	$	158	$	120	$	268	$	232

Summary of Other Information Related to Lease Liabilities [Table Text Block]

	Six Months Ended
	March 31, 2023			March 31, 2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	123		$	119
Weighted average remaining lease term (in years)		4.3			5.1
Weighted average discount rate		3.25	%		3.25	%

Property, Plant, and Equipment, Lessor Asset under Operating Lease [Table Text Block]

	March 31, 2023			September 30, 2022
Rental equipment, primarily wireless recording equipment	$	79,479		$	83,887
Accumulated depreciation and impairment		(58,900	)		(55,688	)
	$	20,579		$	28,199

Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block]

For fiscal years ending September 30,
2023 (remainder)	$	62
2024		128
2025		131
2026		132
2027		11
	$	464