Quarterly report pursuant to Section 13 or 15(d)

Revenue from contracts with customers - Receivables and Contract Liabilities (Details)

v3.19.2
Revenue from contracts with customers - Receivables and Contract Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Deferred license revenue    
Receivables $ 125 $ 174
Deferred revenue 1,190 1,179
Deferred gift card and gift certificate revenue    
Deferred revenue $ 221 $ 491