Note 8 - Revenue - Remaining Performance Obligations (Details)	Jun. 30, 2023 USD ($)
Remaining	$ 3,575,000
Service [Member]
Remaining	1,797,000
Device Revenue [Member]
Remaining	733,000	[1]
Exclusivity Fee [Member]
Remaining	905,000
Other [Member]
Remaining	$ 140,000

[1] Represents the minimum purchase requirements under the distribution agreement the Company signed with its AXP distributor in China.