PROPERTY AND EQUIPMENT - Componants of property and equipment (Details) - USD ($)	6 Months Ended
Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 6,726,367	$ 5,385,478
Less accumulated depreciation	(5,078,393)	(4,790,711)
Property and equipment, net	$ 1,647,974	594,767
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, useful life (years)	3 years
Property and equipment, gross	$ 6,499,205	5,158,316
Office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, useful life (years)	4 years 7 months 6 days
Property and equipment, gross	$ 145,229	145,229
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, useful life (years)	5 years 4 months 24 days
Property and equipment, gross	$ 81,933	$ 81,933

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 10
-Section 50
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-Section S99
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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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