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Subsequent events (Details - Textual) - Subsequent Event [Member] - Paycheck Protection Program Loan - USD ($) $ in Thousands		3 Months Ended
	Apr. 29, 2022	Jun. 30, 2022
Subsequent events
Principal amount of loan obtained	$ 1,499
Interest amount of loan obtained	31
Principal and interest payments to be received as forgiveness	$ 953
Extinguishment of debt		$ 1,499
Gain on extinguishment of debt		$ 27

X

- Definition

Decrease for amounts of indebtedness forgiven by the holder of the debt instrument.

+ References

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-Publisher FASB
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X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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X

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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X

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

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X

- Definition

Amount of interest payable on debt, including, but not limited to, trade payables.

+ References

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

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