pre_text: Note 15. Stock-Based Compensation Stock-based compensation expense is included in the following line items in the consolidated statements of operations (in thousands):
table: Year Ended December 31,
table: Stock-based compensation expense data: 2019 2018 2017
table: Sales and marketing $2,075 $1,196 $561
table: General and administrative 6,474 4,901 2,638
table: Research and development 12,054 7,332 4,214
table: Total stock-based compensation expense $20,603 $13,429 $7,413
question: Analyse this data from a financial earnings document. What was the change in the Sales and marketing between 2018 and 2019?