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Basis of presentation (Details) $ in Thousands		3 Months Ended		9 Months Ended
	Oct. 16, 2020 USD ($) shares	Sep. 30, 2021 USD ($) Manufacturer shares	Sep. 30, 2020 shares	Sep. 30, 2021 USD ($) Manufacturer shares	Sep. 30, 2020 USD ($) shares	May 01, 2020 USD ($)	Mar. 13, 2020 USD ($)
Basis of presentation [Abstract]
Number of manufacturers in China and Thailand | Manufacturer		2		2
Proceeds from Public Offering	$ 8,700			$ 12,214	$ 0
Shares sold in Public Offering (in shares) | shares	1,380,000	842,000	0	842,000	0
PPP Loan [Member]
Basis of presentation [Abstract]
Face amount						$ 2,200
Revolving Credit Facility [Member]
Basis of presentation [Abstract]
Maximum borrowing capacity		$ 10,000		$ 10,000			$ 10,000

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The number of manufacturers located in China and Thailand.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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