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Note 7 - Intangible Assets - Amortizable - Summary of Intangible Assets (Details) - USD ($)
6 Months Ended 12 Months Ended
Dec. 31, 2020
Jun. 30, 2020
Intangible assets, gross carrying amount $ 58,093,000 $ 58,473,000
Intangible assets, accumulated amortization (12,394,000) (9,423,000)
Intangible assets, net carrying amount $ 45,699,000 $ 48,855,000
Intangible assets, weighted-average remaining life (Year) 9 years 160 days 9 years 40 days
MiOXSYS Patent   $ (195,000)
Licensed Assets [Member]    
Intangible assets, gross carrying amount $ 23,649,000 23,649,000
Intangible assets, accumulated amortization (8,200,000) (7,062,000)
Intangible assets, net carrying amount $ 15,449,281 $ 16,586,847
Intangible assets, weighted-average remaining life (Year) 11 years 262 days 11 years 321 days
Technology-Based Intangible Assets [Member]    
Intangible assets, gross carrying amount $ 22,700,000 $ 22,700,000
Intangible assets, accumulated amortization (2,648,000) (1,513,000)
Intangible assets, net carrying amount $ 20,051,666 $ 21,186,666
Intangible assets, weighted-average remaining life (Year) 8 years 306 days 9 years 124 days
MiOXSYS Patent [Member]    
Intangible assets, gross carrying amount   $ 380,000
Intangible assets, accumulated amortization   (185,000)
Intangible assets, net carrying amount  
Intangible assets, weighted-average remaining life (Year)  
MiOXSYS Patent   $ (195,000)
Distribution Rights [Member]    
Intangible assets, gross carrying amount $ 11,354,000 11,354,000
Intangible assets, accumulated amortization (1,319,000) (565,000)
Intangible assets, net carrying amount $ 10,035,000 $ 10,789,000
Intangible assets, weighted-average remaining life (Year) 7 years 98 days 7 years 284 days
Customer Lists [Member]    
Intangible assets, gross carrying amount $ 390,000 $ 390,000
Intangible assets, accumulated amortization (227,000) (98,000)
Intangible assets, net carrying amount $ 163,000 $ 292,000
Intangible assets, weighted-average remaining life (Year) 226 days 1 year 43 days