REVENUE RECOGNITION AND RELATED ALLOWANCES - Additional Information (Details) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020 USD ($) customer	Jun. 30, 2019 customer	Jun. 30, 2020 USD ($) customer	Jun. 30, 2019 customer
Number of customers \| customer	3	3	3	3
Sales of contract manufactured products [Member]
Revenue, Remaining Performance Obligation, Amount	$ 5.8		$ 5.8
Product Development Services [Member]
Revenue, Remaining Performance Obligation, Amount	$ 3.0		$ 3.0
Product Development Services [Member] \| Minimum
Revenue, Remaining Performance Obligation, Remaining Period	6 months		6 months
Product Development Services [Member] \| Maximum
Revenue, Remaining Performance Obligation, Remaining Period	15 months		15 months
Customer One Two And Three [Member]
Concentration Risk, Percentage			83.00%
Customer One [Member]
Concentration Risk, Percentage	33.00%	30.00%	32.00%	32.00%
Customer Two [Member]
Concentration Risk, Percentage	22.00%	26.00%	23.00%	24.00%
Customer Three [Member]
Concentration Risk, Percentage	19.00%	24.00%	19.00%	25.00%

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- Definition

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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- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

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Remaining duration of performance obligation for which optional exemption was applied not to disclose amount of transaction price allocated to and timing of revenue recognition for remaining performance obligation, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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