Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v3.21.1
Summary of Significant Accounting Policies (Narrative) (Details)
 3 Months Ended 9 Months Ended
Mar. 31, 2021
USD ($)
customer
Mar. 31, 2020
USD ($)
customer
Mar. 31, 2021
USD ($)
customer
item
Mar. 31, 2020
USD ($)
customer
Jun. 30, 2020
USD ($)
Summary Of Significant Accounting Policies [Line Items]          
Number of lines of business | item     3    
Contract liabilities (or deferred revenue) $ 886,000   $ 886,000   $ 1,810,000
Goodwill and Intangible Asset Impairment     0 $ 0  
Work in process 432,000   432,000   798,000
Reserve for loss on contract 300,000   300,000    
Contract with Customer, Liability, Revenue Recognized 388,000 $ 86,000 887,000 $ 204,000  
Contract with Customer, Asset, Net, Current 0   $ 0   0
Dividend rate     0.00%    
Amount in excess of insured limit $ 34,229,000   $ 34,229,000   $ 54,680,000
Number of major customers | customer 3 2 4 5  
No Customer [Member] | Revenue [Member] | Customer Concentration Risk [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Concentration Risk, Percentage     50.00%    
One Customers [Member] | Revenue [Member] | Customer Concentration Risk [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Concentration Risk, Percentage 92.00% 78.00%   31.00%  
Two Customers [Member] | Revenue [Member] | Customer Concentration Risk [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Concentration Risk, Percentage   100.00%      
Three Customers [Member] | Revenue [Member] | Customer Concentration Risk [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Concentration Risk, Percentage 100.00%        
Four Customers [Member] | Revenue [Member] | Customer Concentration Risk [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Concentration Risk, Percentage     100.00%    
Five Customers [Member] | Revenue [Member] | Customer Concentration Risk [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Concentration Risk, Percentage       100.00%  
Minimum [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Estimated useful life, Fixed assets     P3Y    
Maximum [Member]          
Summary Of Significant Accounting Policies [Line Items]          
Estimated useful life, Fixed assets     P15Y    
Patents [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