| Summary of Segment Information | The following tables summarize segment information (in $000's):   
       
        |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
        |   |   | For the Three Months Ended March 31, |   |   | For the Six Months Ended March 31, |   |  
        |   |   | 2022 |   |   | 2021 |   |   | 2022 |   |   | 2021 |   |  
        | Revenues |   |   |   |   |   |   |   |   |   |   |   |   |  
        | Retail |   | $ | 20,741 |   |   | $ | 24,003 |   |   | $ | 46,952 |   |   | $ | 46,373 |   |  
        | Flooring Manufacturing |   |   | 32,772 |   |   |   | 32,972 |   |   |   | 65,644 |   |   |   | 63,194 |   |  
        | Steel Manufacturing |   |   | 14,027 |   |   |   | 13,793 |   |   |   | 26,393 |   |   |   | 23,528 |   |  
        | Corporate and Other |   |   | 2,166 |   |   |   | 122 |   |   |   | 5,875 |   |   |   | 249 |   |  
        | Total revenues |   | $ | 69,706 |   |   | $ | 70,890 |   |   | $ | 144,864 |   |   | $ | 133,344 |   |  
        |    |   |   |   |   |   |   |   |   |   |   |   |   |  
        | Gross profit |   |   |   |   |   |   |   |   |   |   |   |   |  
        | Retail |   | $ | 11,110 |   |   | $ | 12,970 |   |   | $ | 24,500 |   |   | $ | 25,017 |   |  
        | Flooring Manufacturing |   |   | 8,580 |   |   |   | 10,022 |   |   |   | 17,609 |   |   |   | 18,347 |   |  
        | Steel Manufacturing |   |   | 4,252 |   |   |   | 3,380 |   |   |   | 7,867 |   |   |   | 5,156 |   |  
        | Corporate and Other |   |   | 1,011 |   |   |   | 118 |   |   |   | 2,593 |   |   |   | 239 |   |  
        | Total gross profit |   | $ | 24,953 |   |   | $ | 26,490 |   |   | $ | 52,569 |   |   | $ | 48,759 |   |  
        |    |   |   |   |   |   |   |   |   |   |   |   |   |  
        | Operating income (loss) |   |   |   |   |   |   |   |   |   |   |   |   |  
        | Retail |   | $ | 3,132 |   |   | $ | 5,071 |   |   | $ | 7,942 |   |   | $ | 9,564 |   |  
        | Flooring Manufacturing |   |   | 3,875 |   |   |   | 6,011 |   |   |   | 8,483 |   |   |   | 10,161 |   |  
        | Steel Manufacturing |   |   | 2,719 |   |   |   | 1,742 |   |   |   | 4,373 |   |   |   | 1,886 |   |  
        | Corporate and Other |   |   | (1,277 | ) |   |   | (1,699 | ) |   |   | (1,942 | ) |   |   | (3,195 | ) |  
        | Total operating income |   | $ | 8,449 |   |   | $ | 11,125 |   |   | $ | 18,856 |   |   | $ | 18,416 |   |  
        |    |   |   |   |   |   |   |   |   |   |   |   |   |  
        | Depreciation and amortization |   |   |   |   |   |   |   |   |   |   |   |   |  
        | Retail |   | $ | 296 |   |   | $ | 391 |   |   | $ | 636 |   |   | $ | 738 |   |  
        | Flooring Manufacturing |   |   | 780 |   |   |   | 907 |   |   |   | 1,559 |   |   |   | 1,872 |   |  
        | Steel Manufacturing |   |   | 281 |   |   |   | 396 |   |   |   | 515 |   |   |   | 789 |   |  
        | Corporate and Other |   |   | 139 |   |   |   | 11 |   |   |   | 335 |   |   |   | 21 |   |  
        | Total depreciation and amortization |   | $ | 1,496 |   |   | $ | 1,705 |   |   | $ | 3,045 |   |   | $ | 3,420 |   |  
        |    |   |   |   |   |   |   |   |   |   |   |   |   |  
        | Interest expenses |   |   |   |   |   |   |   |   |   |   |   |   |  
        | Retail |   | $ | 84 |   |   | $ | 582 |   |   | $ | 236 |   |   | $ | 1,242 |   |  
        | Flooring Manufacturing |   |   | 462 |   |   |   | 648 |   |   |   | 893 |   |   |   | 1,058 |   |  
        | Steel Manufacturing |   |   | 182 |   |   |   | 288 |   |   |   | 479 |   |   |   | 556 |   |  
        | Corporate and Other |   |   | 130 |   |   |   | 131 |   |   |   | 267 |   |   |   | 263 |   |  
        | Total interest expenses |   | $ | 858 |   |   | $ | 1,649 |   |   | $ | 1,875 |   |   | $ | 3,119 |   |  
        |    |   |   |   |   |   |   |   |   |   |   |   |   |  
        | Net income (loss) before provision for income taxes |   |   |   |   |   |   |   |   |   |   |   |   |  
        | Retail |   | $ | 14,593 |   |   | $ | 4,485 |   |   | $ | 19,293 |   |   | $ | 8,658 |   |  
        | Flooring Manufacturing |   |   | 3,337 |   |   |   | 5,171 |   |   |   | 7,382 |   |   |   | 8,893 |   |  
        | Steel Manufacturing |   |   | 2,002 |   |   |   | 2,460 |   |   |   | 3,315 |   |   |   | 2,296 |   |  
        | Corporate and Other |   |   | (1,051 | ) |   |   | (193 | ) |   |   | (1,602 | ) |   |   | (1,195 | ) |  
        | Total net income before provision for income taxes |   | $ | 18,881 |   |   | $ | 11,923 |   |   | $ | 28,388 |   |   | $ | 18,652 |   |  |