Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details Textual)

v3.20.1
Summary of Significant Accounting Policies (Details Textual)
 3 Months Ended 12 Months Ended
Jun. 30, 2015
USD ($)
Mar. 31, 2020
USD ($)
a
Mar. 31, 2019
USD ($)
Apr. 01, 2019
USD ($)
Apr. 07, 2015
a
Apr. 02, 2013
a
Property, Plant and Equipment [Line Items]            
Inventory Write-down   $ 2,000,000 $ 600,000      
Operating Lease, Liability   589,000        
Operating Lease, Right-of-Use Asset   628,000   $ 1,300,000    
Contract with Customer, Liability, Revenue Recognized   1,200,000 1,700,000      
ContractWithCustomerProductReturnAsset   100,000 200,000      
Cash, FDIC Insured Amount   250,000        
Depreciation   400,000 600,000      
Area of Real Estate Property | a           16
Proceeds from Sale of Property Held-for-sale $ 264,000          
Capitalized Contract Cost, Net   $ 0 0      
Machinery and Equipment [Member] | Minimum [Member]            
Property, Plant and Equipment [Line Items]            
Property, Plant and Equipment, Useful Life   5 years        
Machinery and Equipment [Member] | Maximum [Member]            
Property, Plant and Equipment [Line Items]            
Property, Plant and Equipment, Useful Life   7 years        
Land available-for-sale [Member]            
Property, Plant and Equipment [Line Items]            
Area of Real Estate Property | a         4  
Land [Member]            
Property, Plant and Equipment [Line Items]            
Area of Real Estate Property | a   12        
3570 Computer and office Equipment [Member] | Minimum [Member]            
Property, Plant and Equipment [Line Items]            
Property, Plant and Equipment, Useful Life   2 years        
3570 Computer and office Equipment [Member] | Maximum [Member]            
Property, Plant and Equipment [Line Items]            
Property, Plant and Equipment, Useful Life   5 years        
Accounting Standards Update 2014-09 [Member]            
Property, Plant and Equipment [Line Items]            
Cumulative Effect on Retained Earnings, Net of Tax [1]     329,000      
Accounting Standards Update 2014-09 [Member] | Accumulated Deficit [Member]            
Property, Plant and Equipment [Line Items]            
Cumulative Effect on Retained Earnings, Net of Tax [1]     $ 329,000      
[1] Includes the cumulative effect adjustment of the ASC 606 adoption.