SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)	3 Months Ended
Mar. 31, 2021 USD ($) financialInstitution	Dec. 31, 2020 USD ($)
Restricted Cash
Restricted cash \| $	$ 105,000	$ 105,000
Allowance for doubtful accounts \| $	$ 0	0
Minimum
Debt Instrument [Line Items]
Amortization of Royalty or Other Design Development Fee, Period	12 months
Property and Equipment
Useful life (in years)	2 years
Income Taxes
Completed design license term	2 years
Maximum
Debt Instrument [Line Items]
Amortization of Royalty or Other Design Development Fee, Period	18 months
Property and Equipment
Useful life (in years)	5 years
Income Taxes
Sales-based royalties, period in which payment is due	30 days
Letter of Credit
Restricted Cash
Letter of credit annual step down \| $	$ 50,000	$ 50,000
United States
Concentration Risks, Types, No Concentration Percentage
Number of financial institutions where the company holds checking deposits \| financialInstitution	1
Switzerland \| Subsidiaries
Concentration Risks, Types, No Concentration Percentage
Number of financial institutions where the company holds checking deposits \| financialInstitution	1
South Korea
Concentration Risks, Types, No Concentration Percentage
Number of financial institutions where the company holds checking deposits \| financialInstitution	1

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