Commitments and Contingencies - Narrative (Details) $ in Thousands	1 Months Ended						3 Months Ended		6 Months Ended
	May 31, 2021 USD ($)	Apr. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Apr. 30, 2020 USD ($)	Jan. 31, 2020 USD ($)	Jul. 31, 2015 USD ($) ft²	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Oct. 31, 2017	Oct. 31, 2015
Other Commitments [Line Items]
Rent expense							$ 251	$ 231	$ 487	$ 443
Aliso Viejo headquarters
Other Commitments [Line Items]
Lease term						5 years
Square footage of lease space (in square feet) | ft²						14,881
Security deposit						$ 30
Lowest tier of letter of credit						$ 200
Scotland Design Center facility
Other Commitments [Line Items]
Lease term												5 years
Monthly rent					$ 19
Wuxi sales and design center
Other Commitments [Line Items]
Lease term											26 months
Shanghai lease
Other Commitments [Line Items]
Monthly rent				$ 3
Month-to-month lease
Other Commitments [Line Items]
Monthly rent			$ 1
Budapest, Hungary
Other Commitments [Line Items]
Lease term		3 years
Monthly rent		$ 6
Detroit, Michigan
Other Commitments [Line Items]
Lease term	7 years
Monthly rent	$ 22