After-Hours Movers Thursday: GameStop Corp., Deckers Outdoor Corp.

Edap Tms SA

jumped 19.5 percent in late trading Thursday to $3.80 a share. The France-based medical device company didn't issue any news. GameStop Corp.

gained more than 5 percent in the extended session to $43. The company closed up more than 3 percent and posted first-quarter results after the bell. Harvest Natural Resources Inc.

traded up nearly 4 percent to $2.10 after the market closed. Shares of the oil and gas company closed up 14.7 percent on no obvious catalyst. Boot Barn Holdings Inc.

rose nearly 5 percent in the extended session to $23.85. The Western apparel retailer said fourth-quarter same-store sales grew 7 percent. MagnaChip Semiconductor Corp.

rose 3.6 percent to $6.62 in after-hours trading. The company reported a 1.7 percent decline in first-quarter revenue and named its YJ Kim as chief executive and Jonathan Kim as chief financial officer. Both had held the titles on an interim basis. Veeva Systems Inc.

lost 5 percent after hours, trading recently at $27.50. The provider of cloud services for the life sciences industry posted first-quarter results and an outlook. Deckers Outdoor Corp.

fell more than 5 percent in late trading to $67.62. The company said fourth-quarter revenue grew 15.6 percent but forecast flat sales for the first period. Crestwood Midstream Partners LP

fell nearly 4 percent to $12.50 after the bell. The master limited partnership, which plans to be acquired by its affiliate Crestwood Equity Partners LP

, didn't issue news. Splunk Inc.

fell about 3 percent to $68.91. The analytical software company posted quarterly results and an outlook. Golar LNG Ltd.

declined about 2.7 percent after the bell to $48.57. The operator of liquefied natural gas carriers posted quarterly results Wednesday but didn't issue more recent news. Deckers Outdoor Corp