March 31,

December 31,

2021

2020

Payable in connection with repurchase of subsidiaries shares

$

3,730

$

1,439

Accrued compensation and related charges

2,933

4,417

Preferred stock dividends payable

2,901

Payable in connection with construction

943

1,457

Accrued income taxes

791

760

Payable in connection with land restoration of Nanjing JinMei factory

747

750

Advance from customers

657

374

Accrued product warranty

582

609

Accrued professional services

469

675

Current portion of operating lease liabilities

454

445

Other personnel-related costs

180

101

Other tax payable

124

295

Accrual for sales returns

111

81

Other accrued liabilities

1,076

1,691

$

15,698

$

15,995