Annual report pursuant to Section 13 and 15(d)

Revenue - Schedule of Contract Assets and Liabilities (Details)

v3.19.1
Revenue - Schedule of Contract Assets and Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Jan. 02, 2018
Dec. 31, 2017
Account receivables, net of allowance $ 7,735 $ 7,940  
Unbilled receivables - current 3,105 4,547 $ 4,547
Unbilled receivables - non-current 184 184
Deferred revenue 6,595 $ 5,083 $ 4,311
Year-to-date Change [Member]      
Account receivables, net of allowance (205)    
Unbilled receivables - current (1,442)    
Unbilled receivables - non-current (184)    
Deferred revenue $ 1,512    
Changes in Account receivables, net of allowance, percentage (2.60%)    
Changes in Unbilled receivables - current, percentage (31.70%)    
Changes in Unbilled receivables - non-current, percentage (100.00%)    
Changes in Deferred revenue, percentage 29.70%