Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Components of accrued liabilities
Preferred stock dividends payable	$ 2,901	$ 2,901
Accrued compensation and related charges	1,737	3,440
Payable in connection with decontamination of Nanjing JinMei factory	1,105
Accrued professional services	654	706
Accrued product warranty	343	236
Current portion of operating lease liabilities	292
Advance from customers	272	476
Accrued income taxes	245	99
Other personnel related costs	228	202
Payable in connection with construction	134	2,912
Other tax payable	84	261
Accrual for sales refund liabilities	38	47
Payable in connection with repurchase of subsidiaries shares	151	1,147
Deferred government grant income in connection with purchase of land		1,000
Dividends payable by consolidated joint ventures	0	504	$ 505
Other accrued liabilities	1,248	1,440
Accrued liabilities, Total	$ 9,432	$ 15,371