Selected Balance Sheet Accounts (Details 3) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Accrued Expenses and Other Current Liabilities:
Accrued employee-related benefits	$ 2,025	$ 2,123
Other accrued expenses	552	143
Amounts due to customers	82	94
Other current liabilities	311	301
Total other accrued expenses and other current liabilities	945	538
Total accrued expenses and other current liabilities	$ 2,970	$ 2,661