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Stock-Based Compensation - Stock-based compensation expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock-Based Compensation
Total stock-based compensation expense	$ 1,854,965	$ 1,764,319	$ 2,454,363
Cost of revenue
Stock-Based Compensation
Total stock-based compensation expense	256,924	279,221	214,325
General and administrative
Stock-Based Compensation
Total stock-based compensation expense	1,167,161	1,000,002	1,670,015
Sales and marketing
Stock-Based Compensation
Total stock-based compensation expense	348,603	329,644	441,931
Research and development
Stock-Based Compensation
Total stock-based compensation expense	$ 82,277	$ 155,452	$ 128,092

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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+ References

No definition available.

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