Other Assets and Liabilities - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Prepaid Expenses and Other Current Assets:
Valued-added tax recoverable	$ 807	$ 1,378
Prepaid and other expenses	2,757	2,145
Guarantee from Armistice	560	534
Income tax receivable	594	921
Research and development tax credit receivable	270	283
Short-term deposit	0	3,350
Other	175	225
Total	$ 5,163	$ 8,836

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Research And Development Tax Credit Receivable, Current

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Amount of current assets classified as other.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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Carrying amount as of the balance sheet date of value added taxes due either from customers arising from sales on credit terms, or as previously overpaid to tax authorities. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

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