| Disaggregation of Revenue [Table Text Block] |
| | Twelve Months Ended | |
(In thousands) | | June 30, 2026 | |
| | | | | | Display | |
| | Lighting | | | Solutions | |
| | Segment | | | Segment | |
Timing of revenue recognition | | | | | | | | |
Products and services transferred at a point in time | | $ | 219,613 | | | $ | 368,166 | |
Products and services transferred over time | | | 46,610 | | | | 55,008 | |
| | $ | 266,223 | | | $ | 423,174 | |
| | | | | | | | |
Type of Product and Services | | | | | | | | |
Lighting, poles, electronic components | | $ | 263,543 | | | $ | - | |
Signage and display products | | | - | | | | 355,114 | |
Project management, installation services, shipping and handling | | | 2,680 | | | | 68,060 | |
| | $ | 266,223 | | | $ | 423,174 | |
| | Twelve Months Ended | |
(In thousands) | | June 30, 2025 | |
| | | | | | Display | |
| | Lighting | | | Solutions | |
| | Segment | | | Segment | |
Timing of revenue recognition | | | | | | | | |
Products and services transferred at a point in time | | $ | 208,193 | | | $ | 259,432 | |
Products and services transferred over time | | | 40,164 | | | | 65,588 | |
| | $ | 248,357 | | | $ | 325,020 | |
| | | | | | | | |
Type of Product and Services | | | | | | | | |
Lighting, poles, electronic components | | $ | 245,763 | | | $ | - | |
Signage and display products | | | - | | | | 259,936 | |
Project management, installation services, shipping and handling | | | 2,594 | | | | 65,084 | |
| | $ | 248,357 | | | $ | 325,020 | |
| | Twelve Months Ended | |
(In thousands) | | June 30, 2024 | |
| | | | | | Display | |
| | Lighting | | | Solutions | |
| | Segment | | | Segment | |
Timing of revenue recognition | | | | | | | | |
Products and services transferred at a point in time | | $ | 219,820 | | | $ | 151,972 | |
Products and services transferred over time | | | 42,593 | | | | 55,253 | |
| | $ | 262,413 | | | $ | 207,225 | |
| | | | | | | | |
Type of Product and Services | | | | | | | | |
Lighting, poles, electronic components | | $ | 259,477 | | | $ | - | |
Signage and display products | | | - | | | | 165,125 | |
Project management, installation services, shipping and handling | | | 2,936 | | | | 42,100 | |
| | $ | 262,413 | | | $ | 207,225 | |
|
| Schedule of Product Warranty Liability [Table Text Block] |
(In thousands) | | June 30, 2026 | | | June 30, 2025 | | | June 30, 2024 | |
| | | | | | | | | | | | |
Balance at beginning of the period | | $ | 7,505 | | | $ | 6,623 | | | $ | 6,501 | |
Addition from acquired company | | | 500 | | | | 73 | | | | 345 | |
Additions charged to expense | | | 3,801 | | | | 5,304 | | | | 3,781 | |
Deductions for repairs and replacements | | | (4,475 | ) | | | (4,495 | ) | | | (4,004 | ) |
Balance at end of the period | | $ | 7,331 | | | $ | 7,505 | | | $ | 6,623 | |
|