Annual report pursuant to Section 13 and 15(d)

Variable Interest Entity Variable Interest Entity (Details Textual)

v3.21.1
Variable Interest Entity Variable Interest Entity (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Concentration Risk [Line Items]      
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, 50 Percent or Less Owned Persons $ 36    
Revenue   $ 29,947 $ 29,956
Accounts receivable   $ 4,492 4,047
AKA [Member]      
Concentration Risk [Line Items]      
Equity Method Investment, Ownership Percentage   50.00%  
Equity Method Investments   $ 100 100
Revenue   1,200 1,300
Accounts receivable   200 200
Deferred Revenue   200 $ 500
Guarantor Obligations, Maximum Exposure, Undiscounted   $ 700