Quarterly report pursuant to Section 13 or 15(d)

Accrued Warranty - Additional Information (Details)

v3.20.1
Accrued Warranty - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Product Warranty Liability [Line Items]        
Warranty expense $ 32,000 $ 300,000    
Accrued warranty (Note 7) 302,000   $ 338,000 $ 112,000
Catheters [Member] | Product Recall [Member]        
Product Warranty Liability [Line Items]        
Accrued warranty (Note 7) $ 200,000   $ 200,000