pre_text: Stock-based compensation The Company recognized $2.3 million, $2.1 million and $1.9 million of stock-based compensation expense for the years ended March 31, 2019, 2018 and 2017, respectively, as follows: Stock-based compensation expense in the years ended March 31, 2019, 2018 and 2017 included $211,000, $207,000 and $150,000, respectively, related to the Company’s Employee Stock Purchase Plan.
table: Year Ended March 31, 
table: 2019 2018 2017
table: (In thousands)
table: Cost of revenues  $234 $259 $282
table: Research and development 1,310 1,141 980
table: Selling, general and administrative 722 670 615
table: Total $2,266 $2,070 $1,877
question: Analyse this data from a financial earnings document. What was the average cost of revenues between 2017-2019?