| Art 19 para 2 item 4-4 | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Decision on holding shareholders meeting for purpose of reverse stock split | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Decision on holding shareholders meeting for purpose of reverse stock split [text block] | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| 第19条第2項第4号の4 | ja | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| 株式の併合を目的とする株主総会の招集の決定 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 株式の併合を目的とする株主総会の招集の決定 [テキストブロック] | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |