XML 67 R57.htm IDEA: XBRL DOCUMENT v3.21.1
Revolving Line of Credit (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Line of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity $ 15,000  
Line of Credit [Member]    
Line of Credit Facility [Line Items]    
Short-term Debt $ 0 $ 0