Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accrued compensation and related:
Accrued vacation	$ 277	$ 273
Accrued payroll and commission	43	111
Accrued payroll tax	57	52
Accrued interest	696	357
Accrued consulting	31	257
Accrued distributor services fees	1,314	227
Accrued legal costs	291	292
Accrued audit and tax services	70	189
Accrued chargebacks and discounts	736	337
Accrued other	978	827
Total	$ 4,493	$ 2,922