Quarterly report pursuant to Section 13 or 15(d)

Accrued Warranty - Additional Information (Details)

v3.20.2
Accrued Warranty - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Product Warranty Liability [Line Items]            
Warranty expense $ 8,000 $ 500,000 $ 40,000,000,000 $ 800,000    
Accrued warranty (Note 7) 251,000   251,000   $ 338,000 $ 112,000
Catheters [Member] | Product Recall [Member]            
Product Warranty Liability [Line Items]            
Accrued warranty (Note 7) $ 100,000   $ 100,000   $ 200,000