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Restricted Stock, Stock Options and Other Stock Plans - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation cost | $ 100 | $ 37 |
Amount capitalized to real estate owned | $ 14 | 5 |
Weighted-average remaining contractual term of unexercised stock options | 8 years |  | 8 years
General and Administrative Expenses and Cost of Sales [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation cost | $ 86 | $ 32 |
Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares issued by the company |  | 157,000 |
Restricted Stock Awards [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares issued by the company | 0 | 245,000 |
2004 Long-Term Compensation Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized compensation cost related to stock issuances | $ 500 |  | $ 600

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