Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Leases (Details Textual)

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Note 8 - Leases (Details Textual)
1 Months Ended 3 Months Ended
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Sep. 30, 2018
USD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Feb. 01, 2017
USD ($)
ft²
Operating Lease, Expense       $ 73,000 $ 76,000  
Operating Lease, Weighted Average Remaining Lease Term (Month)   2 years 330 days   2 years 330 days    
Operating Lease, Weighted Average Discount Rate, Percent   12.50%   12.50%    
Operating Lease, Property Plant and Equipment, Amount   $ 709,000   $ 709,000    
Sublease Agreement for Relocation of Headquarters [Member]            
Area of Real Estate Property (Square Foot) | ft²           12,400
Operating Leases, Monthly Rent Per Rentable Square Foot During First Year           20.5
Operating Leases, Monthly Rent Per Rentable Square Foot During Second Year           21.12
Operating Leases, Monthly Rent Per Rentable Square Foot During Third Year           21.75
Security Deposit           $ 22,000
Operating Leases, Allowance for Certain Improvements           $ 88,000
Lessee, Operating Lease, Renewal Term (Month)   2 years 300 days   2 years 300 days    
Sublease Agreement for Relocation of Headquarters [Member] | Forecast [Member]            
Lessee, Operating Lease, Rent Abatement $ 19,000          
Sublease Agreement for Relocation of Headquarters First Year Extension [Member]            
Lessee, Operating Lease, Monthly Gross Rent   $ 21,028        
Sublease Agreement for Relocation of Headquarters Second Year Extension [Member]            
Lessee, Operating Lease, Monthly Gross Rent   21,643        
Sublease Agreement for Relocation of Headquarters Third Year Extension [Member]            
Lessee, Operating Lease, Monthly Gross Rent   $ 22,258        
Noncancelable Operating Lease Agreement for Office Equipment [Member]            
Lessee, Operating Lease, Term of Contract (Month)     3 years      
Operating Leases, Monthly Payment     $ 3,000      
Leases of Viveve Systems [Member]            
Lessor, Operating Lease, Depreciation on Leased Assets       $ 110,000 $ 113,000