pre_text: The following table provides reconciliation from U.S. GAAP Operating income to non-GAAP Adjusted operating income (amounts in thousands): (1) Fiscal years ending March 31, 2018 and 2017 adjusted due to the adoption of ASC 606. (2) $0.9 million in costs incurred during fiscal year 2018 related to the relocation of the Company's tantalum powder facility equipment from Carson City, Nevada to its existing Matamoros, Mexico plant were reclassified from “Plant start-up costs” to “Restructuring charges” during fiscal year 2019.
table: Fiscal Years Ended March 31,
table: 2019 2018 2017
table: Operating income (GAAP) (1) $200,849 $112,852 $34,968
table: Non-GAAP adjustments:
table: (Gain) loss on write down and disposal of long-lived assets 1,660 (992) 10,671
table: ERP integration costs/IT transition costs 8,813 80 7,045
table: Stock-based compensation 12,866 7,657 4,720
table: Restructuring charges (2) 8,779 14,843 5,404
table: Legal expenses related to antitrust class actions 5,195 6,736 2,640
table: TOKIN investment-related expenses — — 1,101
table: Plant start-up costs (2) (927) 929 427
table: Adjusted operating income (non-GAAP) (1) $237,235 $142,105 $66,976
question: Analyse this data from a financial earnings document. What was the change in the Stock-based compensation between 2017 and 2019?