| （単位：千ドル） | 2Q11 | 3Q11 | 4Q11 | 1Q12 | 3Q12 | 4Q12 | 1Q13 | 2Q13 | 3Q13 | 4Q13 | 1Q14 | 2Q14 | 3Q14 | 4Q14 | 1Q15 | 2Q15 | 3Q15 | 4Q15 | 1Q16 | 2Q16 | 3Q16 | 4Q16 | 1Q17 | 2Q17 | 3Q17 | 4Q17 | 1Q18 | 2Q18 | 3Q18 | 4Q18 | 1Q19 | 2Q19 | 3Q19 | 4Q19 | 1Q20 | 2Q20 | 3Q20 | 4Q20 | 1Q21 | 2Q21 | 3Q21 | 4Q21 | 1Q22 | 2Q22 | 3Q22 | 4Q22 | 1Q23 | 2Q23 | 3Q23 | 4Q23 | 1Q24 | 2Q24 | 3Q24 | 4Q24 | 1Q25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 現金同等物 | 27,140 | 29,605 | 23,704 | 29,663 | 39,006 | 19,765 | 26,472 | 36,108 | 19,471 | 17,202 | 28,106 | 40,973 | 41,892 | 35,811 | 32,942 | 27,846 | 32,588 | 34,227 | 46,230 | 41,198 | 38,479 | 45,479 | 33,885 | 32,968 | 44,373 | 40,913 | 47,538 | 43,123 | 38,069 | 30,751 | 31,106 | 21,777 | 20,558 | 30,289 | 45,539 | 78,864 | 71,139 | 42,975 | 51,960 | 45,801 | 60,980 | 67,585 | 30,766 | 27,156 | 19,676 | 9,633 | 38,739 | 35,582 | 45,999 | 53,730 | 54,953 | 60,987 | 49,981 | 33,131 | 30,428 |
| 現金 + 有価証券 | 27,140 | 29,605 | 23,704 | 29,663 | 39,006 | 19,765 | 26,472 | 36,108 | 19,471 | 17,202 | 28,106 | 40,973 | 41,892 | 35,811 | 32,942 | 27,846 | 32,588 | 34,227 | 46,230 | 41,198 | 38,479 | 45,479 | 33,885 | 32,968 | 44,373 | 40,913 | 47,538 | 43,123 | 38,069 | 30,751 | 31,106 | 21,777 | 20,558 | 30,289 | 45,539 | 78,864 | 71,139 | 42,975 | 51,960 | 45,801 | 60,980 | 67,585 | 30,766 | 27,156 | 19,676 | 9,633 | 38,739 | 35,582 | 45,999 | 53,730 | 54,953 | 60,987 | 49,981 | 33,131 | 30,428 |
| 有形固定資産 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 7,681 | 7,491 | 7,310 | - | - |
| 総資産 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 717,582 | 711,042 | 697,596 | - | - |
| 長期借入金 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 25,250 | 23,250 | 10,250 | - | - |
| 総負債 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 631,072 | 624,110 | 607,719 | - | - |
| 資本金及び資本剰余金 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 68 | 68 | 68 | - | - |
| 利益剰余金 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 79,970 | 80,725 | 81,696 | - | - |
| 株主資本 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 86,510 | 86,932 | 89,877 | - | - |
| 有利子負債合計 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 25,250 | 23,250 | 10,250 | - | - |
| 純有利子負債 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | -29,703 | -37,737 | -39,731 | - | - |
| DEレシオ（％） | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 29.19 | 26.75 | 11.4 | - | - |