Basis of Presentation, Business Plan and Liquidity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
Apr. 06, 2018	Dec. 31, 2017	Dec. 31, 2016
Operations [Line Items]
Common stock, par value (in USD per share)		$ 0.01	$ 0.01
Net loss		$ 10,865	$ (5,213)
Operating cash flow		8,726	(195)
Stockholders' deficit		57,900
Cash		2,740	4,805
Liabilities		97,719	$ 91,829
NMLLC
Operations [Line Items]
Cash		$ 1,100
Subsequent Event
Operations [Line Items]
Proceeds from sale of mortgage securities	$ 2,900

Operations [Line Items]

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Face amount or stated value per share of common stock.

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Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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