Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v3.21.2
Summary of Significant Accounting Policies (Narrative) (Details)
 12 Months Ended
Jun. 30, 2021
USD ($)
customer
item
Jun. 30, 2020
USD ($)
customer
Summary Of Significant Accounting Policies [Line Items]    
Number of lines of business | item 3  
Reserve for loss on contract $ 0 $ 0
Contract assets 0 0
Contract liabilities (or deferred revenue) 423,000 1,810,000
Revenue recognized included in contract liabilities $ 1,087,000 1,087,000
Lease, Practical Expedients, Package [true false] true  
Work in progress $ 27,000 $ 798,000
Dividend rate 0.00% 0.00%
Amount in excess of insured limit $ 27,013,000 $ 54,680,000
Number of major customers | customer 4 1
One Customer [Member] | Revenue [Member] | Customer Concentration Risk [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Concentration risk, percentage   77.00%
Four Customers [Member] | Revenue [Member] | Customer Concentration Risk [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Concentration risk, percentage 99.00%  
Minimum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Fixed assets, useful life 3 years  
Maximum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Fixed assets, useful life 15 years  
Patents and Licenses [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Intangible asset, useful life 10 years  
Intellectual Property [Member] | Minimum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Intangible asset, useful life 16 years  
Intellectual Property [Member] | Maximum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Intangible asset, useful life 23 years