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Summary of Significant Accounting Policies (Details Textual)	3 Months Ended
	Mar. 31, 2019 USD ($) Customer / Customers	Mar. 31, 2018 USD ($) Customer / Customers	Dec. 31, 2018 USD ($)
Summary of Significant Accounting Policies (Textual)
Stock-based compensation	$ 272,000	$ 83,000
Goodwill	163,000		$ 163,000
NTW
Summary of Significant Accounting Policies (Textual)
Goodwill	$ 163,000		$ 163,000
Sales [Member]
Summary of Significant Accounting Policies (Textual)
Number of customers | Customer / Customers	3	3
Concentration risks	73.80%	73.10%
Receivables [Member]
Summary of Significant Accounting Policies (Textual)
Number of customers | Customer / Customers	2	2
Concentration risks	57.00%	64.50%

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Number of customers.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

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