5. Trade Receivables, net (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Gross trade receivables	$ 545	$ 443
Less allowance for doubtful accounts	(24)	(14)
Trade receivables, net	524	429
Current trade receivables, net	517	419
Long-term trade receivables, net	7	10
Trade receivables, net	$ 524	$ 429

Trade receivables net.

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- Definition

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Amount of allowance for credit loss on accounts receivable.

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- Definition

The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle) and amount due to the Entity from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such investments and receivables to an amount that approximates their net realizable value.

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