Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Narrative) (Details)

v3.21.1
Intangible Assets (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Finite-Lived Intangible Assets [Line Items]        
Amortization of Intangible Assets $ 73,000 $ 72,000 $ 218,000 $ 225,000
Intangible asset impairment     $ 0 $ 0
Patents [Member]        
Finite-Lived Intangible Assets [Line Items]        
Intangible asset, useful life     10 years  
Maximum [Member] | Intellectual Property [Member]        
Finite-Lived Intangible Assets [Line Items]        
Intangible asset, useful life     23 years  
Minimum [Member] | Intellectual Property [Member]        
Finite-Lived Intangible Assets [Line Items]        
Intangible asset, useful life     16 years