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Commitments and Contingencies - Right of Use Assets and Liabilities (Details) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) ft²	May 31, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($) ft²	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($) ft²	Dec. 31, 2020 USD ($)
Right-of-use assets and lease liabilities capitalized			5.50%		5.50%
ROU assets					$ 0
ROU asset			$ 258		258		$ 334
Lease liability			189		189		219
Lease liabilities, long-term			$ 87		$ 87		$ 140
Right of use assets and liabilities
Weighted-average remaining lease term			1 year 1 month 6 days		1 year 1 month 6 days
Operating lease costs			$ 84	$ 51	$ 166	$ 110
JAPAN
Area of sublease space | ft²	500			500		500
Sublease rent per month	$ 1
Singapore
Area of sublease space | ft²	4,544			4,544		4,544
Hong Kong
Area of sublease space | ft²	3,000			3,000		3,000
Sublease rent per month	$ 2
Cost of revenue
Right of use assets and liabilities
Operating lease costs			30	$ 19	59	$ 43
Operating expenses
Right of use assets and liabilities
Operating lease costs			$ 54	$ 32	$ 107	$ 67
Space located in Irvine, California for executive offices, sales, finance and administration
Area of sublease space | ft²	4,351			4,351		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			14,476		14,476
Sublease rent per month	$ 8	$ 7
Shenzhen, China manufacturing facility | Singapore
Sublease rent per month	$ 10

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Represents the information pertaining to number of square feet given as sublease.

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- Definition

Discount rate used by lessee to determine present value of operating lease payments.

+ References

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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.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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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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