Quarterly report pursuant to Section 13 or 15(d)

Accrued Warranty - Additional Information (Details)

v3.21.2
Accrued Warranty - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Product Warranty Liability [Line Items]            
Warranty expense $ 15,000 $ 8,000 $ 39,000 $ 40,000    
Accrued warranty (Note 7) 237,000   237,000   $ 242,000 $ 338,000
Catheters [Member] | Product Recall [Member]            
Product Warranty Liability [Line Items]            
Accrued warranty (Note 7) $ 100,000   $ 100,000   $ 100,000