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COMMITMENTS AND CONTINGENCIES - Right of Use Assets and Liabilities (Details) $ in Thousands	1 Months Ended		3 Months Ended
	Jun. 30, 2020 USD ($) ft²	May 31, 2020 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
ROU asset			$ 272		$ 334
Lease liability			195		219
Lease liabilities, long term			$ 99		$ 140
Right of use assets and liabilities
Weighted-average remaining lease term			1 year 2 months 12 days
Operating lease costs			$ 82	$ 59
JAPAN
Area of sublease space | ft²	500
Sublease rent per month	$ 1
Singapore
Area of sublease space | ft²	4,544
Hong Kong
Area of sublease space | ft²	3,000
Sublease rent per month	$ 2
Cost of revenue
Right of use assets and liabilities
Operating lease costs			30	24
Operating expenses
Right of use assets and liabilities
Operating lease costs			$ 52	$ 35
Space located in Irvine, California for executive offices, sales, finance and administration
Area of sublease space | ft²	4,351
Sublease rent per month	$ 5
Percentage of annual increase in sublease rent	3.00%
Shenzhen, China manufacturing facility
Area of sublease space | ft²	14,476
Sublease rent per month	$ 8	$ 7
Shenzhen, China manufacturing facility | Singapore
Sublease rent per month	$ 10

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

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-Publisher FASB
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-SubTopic 20
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Amount of lessee's right to use underlying asset under operating lease.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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