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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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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, 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.

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- Definition

Face amount or stated value per share of common stock.

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Amount of inventory reserves for last-in first-out (LIFO) and other inventory valuation methods.

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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Summary of Significant Accounting Policies - Reverse Stock Splits (Details) $ / shares in Units, $ in Thousands	Nov. 11, 2019 $ / shares	Nov. 07, 2018	Jun. 01, 2018	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($)
Summary of Significant Accounting Policies
Reverse stock split ratio	120	140	15
Common stock, par value (in dollars per share) \| $ / shares	$ 0.01			$ 0.001	$ 0.001
Cash and cash equivalents				$ 2,935	$ 5,548
Restricted Cash				50
Total cash, cash equivalents, and restricted cash in the consolidated statement of cash flows				2,985	5,548	$ 10,163
Allowance for excess and slow moving inventory				$ 200	$ 3,400