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Segment Disclosures - Segment Reporting Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gross revenue |  |  |  |  |  |  |  |  |  |  | $ 25,317 | $ 16,447
Net income (loss) | $ (627) | $ (237) | $ 85 | $ (1,828) | $ (1,041) | $ (710) | $ (152) | $ (1,751) | $ (779) | $ (3,579) | 893 | (4,385)
Total assets |  |  |  |  |  |  |  |  |  |  | 19,933 | 35,100
Continuing Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gross revenue |  |  |  |  |  |  |  |  |  |  | 25,317 | 16,447
Gross profit |  |  |  |  |  |  |  |  |  |  | 4,145 | 1,123
Net income (loss) |  |  |  |  |  |  |  |  |  |  | 1,464 | 1,407
Total assets |  |  |  |  |  |  |  |  |  |  | 19,933 | 7,232
Depreciation, amortization, and stock based compensation |  |  |  |  |  |  |  |  |  |  | 696 | 446
Interest expense |  |  |  |  |  |  |  |  |  |  | 474 | 90
Asset Management [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gross revenue |  |  |  |  |  |  |  |  |  |  | 19,605 | 13,416
Gross profit |  |  |  |  |  |  |  |  |  |  | 3,044 | 1,182
Net income (loss) |  |  |  |  |  |  |  |  |  |  | 1,737 | 2,256
Total assets |  |  |  |  |  |  |  |  |  |  | 15,270 | 3,870
Depreciation, amortization, and stock based compensation |  |  |  |  |  |  |  |  |  |  | 430 | 225
Interest expense |  |  |  |  |  |  |  |  |  |  | 390 |
Real Estate Services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gross revenue |  |  |  |  |  |  |  |  |  |  | 5,712 | 3,031
Gross profit |  |  |  |  |  |  |  |  |  |  | 1,101 | (59)
Net income (loss) |  |  |  |  |  |  |  |  |  |  | (273) | (849)
Total assets |  |  |  |  |  |  |  |  |  |  | 4,663 | 3,362
Depreciation, amortization, and stock based compensation |  |  |  |  |  |  |  |  |  |  | 266 | 221
Interest expense |  |  |  |  |  |  |  |  |  |  | $ 84 | $ 90

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