COMMITMENTS, CONTINGENCIES AND CONCENTRATIONS - NARRATIVE (Details)	6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017	Dec. 31, 2017 USD ($)	Oct. 31, 2015 USD ($) ft²
Other Commitments [Line Items]
Purchase commitments for inventories	$ 5,400,000
Accrued severance and related	439,000		$ 1,242,000
Purchase, NY
Other Commitments [Line Items]
Accrued severance and related	$ 119,000
Customer concentration risk | Trade receivable | 10 Largest Customers
Other Commitments [Line Items]
Concentration receivable risk (as a percent)	36.70%	29.20%
Customer concentration risk | Sales Revenue | 10 Largest Customers
Other Commitments [Line Items]
Concentration receivable risk (as a percent)	39.50%	51.70%
Customer concentration risk | Sales Revenue | McKesson
Other Commitments [Line Items]
Concentration receivable risk (as a percent)	15.50%	15.50%
Customer concentration risk | Sales Revenue | National Distribution & Contracting Inc.
Other Commitments [Line Items]
Concentration receivable risk (as a percent)	7.10%	10.10%
Sophia, Bulgaria
Other Commitments [Line Items]
Area of real estate property (in square feet) | ft²				18,745
Monthly cost of office space				$ 6,006