Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accrued Liabilities, Current [Abstract]
Payroll and related expenses	$ 8,214	$ 6,053
Accrued payables	2,368	2,674
Accrued payroll and other current liabilities	2,389	2,323
Lease financing, current portion	905	1,033
Product warranty	521	420
Customer Refund Liability, Current	1,147	631
Sales and use tax payable	334	599
Other	1,201	1,024
Total accrued payroll and other current liabilities	$ 17,079	$ 14,757